NXP P89LPC971FDH 8-bit microcontroller Data Sheet

P89LPC970/971/972
8-bit microcontroller with accelerated two-clock 80C51 core
2 kB/4 kB/8 kB wide-voltage byte-erasable flash
Rev. 3 — 8 June 2010
Product data sheet
1. General description
The P89LPC970/971/972 is a single-chip microcontroller, available in low cost packages,
based on a high performance processor architecture that executes instructions in two to
four clocks, six times the rate of standard 80C51 devices. Many system-level functions
have been incorporated into the P89LPC970/971/972 in order to reduce component
count, board space, and system cost.
2. Features and benefits
2.1 Principal features
„ 2 kB/4 kB/8 kB byte-erasable flash code memory organized into 1 kB sectors and
64-byte pages. Single-byte erasing allows any byte(s) to be used as non-volatile data
storage.
„ 256-byte RAM data memory.
„ Two analog comparators with selectable inputs and reference source.
„ Five 16-bit counter/timers (each may be configured to toggle a port output upon timer
overflow or to become a PWM output).
„ A 23-bit system timer that can also be used as real-time clock consisting of a 7-bit
prescaler and a programmable and readable 16-bit timer.
„ Enhanced UART with a fractional baud rate generator, break detect, framing error
detection, and automatic address detection; 400 kHz byte-wide I2C-bus
communication port.
„ SPI communication port (pin remap).
„ High-accuracy internal RC oscillator option 7.373 MHz calibrated to ±1 %, with clock
doubler option, allows operation without external oscillator components. The RC
oscillator option is selectable and fine tunable.
„ Watchdog timer with separate on-chip oscillator, nominal 400 kHz/25 kHz, calibrated to
±10 % at 400 kHz, requiring no external components. The watchdog prescaler is
selectable from eight values.
„ Pin remap for UART, I2C-bus and SPI.
„ 2.4 V to 5.5 V VDD operating range.
„ Enhanced low voltage (brownout) detect allows a graceful system shutdown when
power fails.
„ 20-pin TSSOP and DIP packages with 15 I/O pins minimum and up to 18 I/O pins
while using on-chip oscillator and reset options.
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
2.2 Additional features
„ A high performance 80C51 CPU provides instruction cycle times of 111 ns to 222 ns
for all instructions except multiply and divide when executing at 18 MHz. This is six
times the performance of the standard 80C51 running at the same clock frequency. A
lower clock frequency for the same performance results in power savings and reduced
EMI.
„ Serial flash In-Circuit Programming (ICP) allows simple production coding with
commercial EPROM programmers. Flash security bits prevent reading of sensitive
application programs.
„ Serial flash In-System Programming (ISP) allows coding while the device is mounted
in the end application.
„ In-Application Programming (IAP) of the flash code memory. This allows changing the
code in a running application.
„ Clock switching on the fly among internal RC oscillator, watchdog oscillator, external
clock source provides optimal support of minimal power active mode with fast
switching to maximum performance.
„ Idle and two different power-down reduced power modes. Improved wake-up from
Power-down mode (a LOW interrupt input starts execution). Typical power-down
current is 1 μA (total power-down with voltage comparators disabled).
„ Integrated PMU (Power Management Unit) automatically adjusts internal regulators to
minimize power consumption during Idle mode, Power-down mode and total
Power-down mode. In addition, the power consumption can be further reduced in
Normal or Idle mode through configuring regulators modes according to the
applications.
„ Active-LOW reset. On-chip power-on reset allows operation without external reset
components. A software reset function is also available.
„ Configurable on-chip oscillator with frequency range options selected by user
programmed flash configuration bits. Oscillator options support frequencies from
20 kHz to the maximum operating frequency of 18 MHz.
„ Oscillator fail detect. The watchdog timer has a separate fully on-chip oscillator
allowing it to perform an oscillator fail detect function.
„ Programmable port output configuration options: quasi-bidirectional, open drain,
push-pull, input-only.
„ High current sourcing/sinking (20 mA) on eight I/O pins (P0.3 to P0.7, P1.4, P1.6,
P1.7). All other port pins have high sinking capability (20 mA). A maximum limit is
specified for the entire chip.
„ Port ‘input pattern match’ detect. Port 0 may generate an interrupt when the value of
the pins match or do not match a programmable pattern.
„ Controlled slew rate port outputs to reduce EMI. Outputs have approximately 10 ns
minimum ramp times.
„ Only power and ground connections are required to operate the P89LPC970/971/972
when internal reset option is selected.
„ Four interrupt priority levels.
„ Eight keypad interrupt inputs, plus two additional external interrupt inputs.
„ Schmitt trigger port inputs.
„ Second data pointer.
„ Emulation support.
P89LPC97X
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
2 of 66
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
3. Ordering information
Table 1.
Ordering information
Type number
Package
Name
Description
Version
P89LPC970FDH
TSSOP20
plastic thin shrink small outline package; 20
leads; body width 4.4 mm
SOT360-1
P89LPC971FDH
TSSOP20
plastic thin shrink small outline package; 20
leads; body width 4.4 mm
SOT360-1
P89LPC972FDH
TSSOP20
plastic thin shrink small outline package; 20
leads; body width 4.4 mm
SOT360-1
P89LPC972FN
DIP20
plastic dual in-line package; 20 leads (300 mil)
SOT146-1
3.1 Ordering options
Table 2.
P89LPC97X
Product data sheet
Ordering options
Type number
Flash memory
Temperature range
Frequency
P89LPC970FDH
2 kB
−40 °C to +85 °C
0 MHz to 18 MHz
P89LPC971FDH
4 kB
−40 °C to +85 °C
0 MHz to 18 MHz
P89LPC972FDH
8 kB
−40 °C to +85 °C
0 MHz to 18 MHz
P89LPC972FN
8 kB
−40 °C to +85 °C
0 MHz to 18 MHz
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
3 of 66
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
4. Block diagram
P89LPC970/971/972
ACCELERATED 2-CLOCK 80C51 CPU
2 kB/4 kB/8 kB
CODE FLASH
P3[1:0]
PORT 3
CONFIGURABLE I/Os
P1[7:0]
PORT 1
CONFIGURABLE I/Os
P0[7:0]
PORT 0
CONFIGURABLE I/Os
I2C-BUS
SCL
SDA
REAL-TIME CLOCK/
SYSTEM TIMER
WATCHDOG TIMER
AND OSCILLATOR
PROGRAMMABLE
OSCILLATOR DIVIDER
SPICLK(1)
MOSI(1)
MISO(1)
SS(1)
SPI
KEYPAD
INTERRUPT
CONFIGURABLE
OSCILLATOR
TXD
RXD
internal bus
256-BYTE
DATA RAM
XTAL1
CRYSTAL
OR
RESONATOR XTAL2
UART
CPU
clock
ON-CHIP RC
OSCILLATOR
WITH CLOCK
DOUBLER
TIMER 0
TIMER 1
T0
T1
TIMER 2
TIMER 3
TIMER 4
T2
T2EX
T3
T3EX
T4
T4EX
ANALOG
COMPARATORS
CMP2
CIN2B
CIN2A
CMP1
CIN1A
CIN1B
POWER MANAGEMENT
(POWER-ON RESET,
BROWNOUT RESET,
REGULATORS)
002aae550
(1) For pin remap
Fig 1.
Block diagram
P89LPC97X
Product data sheet
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Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
4 of 66
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
5. Functional diagram
VDD
SPICLK(1)
KBI0
KBI1
KBI2
KBI3
KBI4
KBI5
KBI6
KBI7
CMP2
CIN2B
CIN2A
CIN1B
CIN1A
CMPREF
CMP1
T1
CLKOUT
XTAL2
T2
T3
VSS
PORT 0
PORT 1
P89LPC970/
971/972
TXD
RXD
T0
INT0
INT1
RST
MISO(1)
T3EX
T2EX
SCL
SDA
T4EX
T4
SS(1)
MOSI(1)
PORT 3
XTAL1
002aae551
(1) For pin remap
Fig 2.
Functional diagram
P89LPC97X
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
5 of 66
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
6. Pinning information
6.1 Pinning
P0.0/CMP2/KBI0/SPICLK
1
20 P0.1/CIN2B/KBI1
P1.7/T3EX/MOSI
2
19 P0.2/CIN2A/KBI2
P1.6/MISO
3
18 P0.3/CIN1B/KBI3/T2
P1.5/RST
4
17 P0.4/CIN1A/KBI4
VSS
5
P3.1/XTAL1
6
P3.0/XTAL2/CLKOUT
7
14 P0.6/CMP1/KBI6
P1.4/INT1/T4EX/SS
8
13 P0.7/KBI7/T1
P1.3/INT0/SDA/T4
9
12 P1.0/TXD
P89LPC970/971/972
P1.2/SCL/T0 10
16 P0.5/CMPREF/KBI5/T3
15 VDD
11 P1.1/RXD/T2EX
002aae552
Fig 3.
TSSOP20 pin configuration
P89LPC972
P0.0/CMP2/KBI0/SPICLK
1
20 P0.1/CIN2B/KBI1
P1.7/T3EX/MOSI
2
19 P0.2/CIN2A/KBI2
P1.6/MISO
3
18 P0.3/CIN1B/KBI3/T2
P1.5/RST
4
17 P0.4/CIN1A/KBI4
VSS
5
16 P0.5/CMPREF/KBI5/T3
P3.1/XTAL1
6
15 VDD
P3.0/XTAL2/CLKOUT
7
14 P0.6/CMP1/KBI6
P1.4/INT1/T4EX/SS
8
13 P0.7/KBI7/T1
P1.3/INT0/SDA/T4
9
12 P1.0/TXD
P1.2/SCL/T0 10
11 P1.1/RXD/T2EX
002aae553
Fig 4.
P89LPC97X
Product data sheet
P89LPC972 DIP20 pin configuration
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Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
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P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
6.2 Pin description
Table 3.
Pin description
Symbol
Pin
Type
Description
I/O
Port 0: Port 0 is an 8-bit I/O port with a user-configurable output type. During reset
Port 0 latches are configured in the input-only mode with the internal pull-up
disabled. The operation of Port 0 pins as inputs and outputs depends upon the port
configuration selected. Each port pin is configured independently. Refer to Section
7.16.1 “Port configurations” and Table 11 “Static characteristics” for details.
DIP20,
TSSOP20
P0.0 to P0.7
The Keypad Interrupt feature operates with Port 0 pins.
All pins have Schmitt trigger inputs.
Port 0 also provides various special functions as described below:
P0.0/CMP2/KBI0/
SPICLK
P0.1/CIN2B/
KBI1
P0.2/CIN2A/
KBI2
P0.3/CIN1B/
KBI3/T2
1
20
19
18
P0.4/CIN1A/
KBI4
17
P0.5/CMPREF/
KBI5/T3
16
P89LPC97X
Product data sheet
I/O
P0.0 — Port 0 bit 0.
O
CMP2 — Comparator 2 output
I
KBI0 — Keyboard input 0.
I/O
SPICLK — SPI clock. When configured as master, this pin is output; when
configured as slave, this pin is input (pin remap).
I/O
P0.1 — Port 0 bit 1.
I
CIN2B — Comparator 2 positive input B.
I
KBI1 — Keyboard input 1.
I/O
P0.2 — Port 0 bit 2.
I
CIN2A — Comparator 2 positive input A.
I
KBI2 — Keyboard input 2.
I/O
P0.3 — Port 0 bit 3. High current source.
I
CIN1B — Comparator 1 positive input B.
I
KBI3 — Keyboard input 3.
I/O
T2 — Timer/counter 2 external count input or overflow output.
I/O
P0.4 — Port 0 bit 4. High current source.
I
CIN1A — Comparator 1 positive input A.
I
KBI4 — Keyboard input 4.
I/O
P0.5 — Port 0 bit 5. High current source.
I
CMPREF — Comparator reference (negative) input.
I
KBI5 — Keyboard input 5.
I/O
T3 — Timer/counter 3 external count input or overflow output.
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Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
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P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
Table 3.
Pin description …continued
Symbol
Pin
Type
Description
I/O
P0.6 — Port 0 bit 6. High current source.
DIP20,
TSSOP20
P0.6/CMP1/KBI6
P0.7/KBI7/T1
14
13
P1.0 to P1.7
O
CMP1 — Comparator 1 output.
I
KBI6 — Keyboard input 6.
I/O
P0.7 — Port 0 bit 7. High current source.
I
KBI7 — Keyboard input 7.
I/O
T1 — Timer/counter 1 external count input or overflow output.
I/O, I
Port 1: Port 1 is an 8-bit I/O port with a user-configurable output type, except for
three pins as noted below. During reset Port 1 latches are configured in the
input-only mode with the internal pull-up disabled. The operation of the configurable
Port 1 pins as inputs and outputs depends upon the port configuration selected.
Each of the configurable port pins are programmed independently. Refer to Section
7.16.1 “Port configurations” and Table 11 “Static characteristics” for details. P1.2 to
P1.3 are open drain when used as outputs. P1.5 is input only.
[1]
All pins have Schmitt trigger inputs.
Port 1 also provides various special functions as described below:
P1.0/TXD
P1.1/RXD/T2EX
P1.2/SCL/T0
P1.3/INT0/SDA/
T4
P1.4/INT1/T4EX/
SS
P1.5/RST
P1.6/MISO
P89LPC97X
Product data sheet
12
11
10
9
8
4
3
I/O
P1.0 — Port 1 bit 0.
O
TXD — Transmitter output for serial port.
I/O
P1.1 — Port 1 bit 1.
I
RXD — Receiver input for serial port.
I
T2EX — Timer/counter 2 external capture input.
I/O
P1.2 — Port 1 bit 2 (open-drain when used as output).
I/O
SCL — I2C-bus serial clock input/output.
I/O
T0 — Timer/counter 0 external count input or overflow output. (open-drain when
used as output.)
I/O
P1.3 — Port 1 bit 3 (open-drain when used as output).
I
INT0 — External interrupt 0 input.
I/O
SDA — I2C-bus serial data input/output.
I/O
T4 — Timer/counter 4 external count input or overflow output.
I/O
P1.4 — Port 1 bit 4. High current source.
I
INT1 — External interrupt 1 input.
I
T4EX — Timer/counter 4 external capture input.
I
SS — SPI Slave select input (pin remap).
I
P1.5 — Port 1 bit 5 (input only).
I
RST — External Reset input during power-on or if selected via UCFG1. When
functioning as a reset input, a LOW on this pin resets the microcontroller, causing
I/O ports and peripherals to take on their default states, and the processor begins
execution at address 0. Also used during a power-on sequence to force ISP mode.
I/O
P1.6 — Port 1 bit 6. High current source.
I/O
MISO — SPI master in slave out. When configured as master, this pin is input,
when configured as slave, this pin is output (pin remap).
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Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
8 of 66
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
Table 3.
Pin description …continued
Symbol
Pin
Type
Description
I/O
P1.7 — Port 1 bit 7. High current source.
I
T3EX — Timer/counter 3 external capture input.
I/O
MOSI — SPI master out slave in. When configured as master, this pin is output;
when configured as slave, this pin is input (pin remap).
I/O
Port 3: Port 3 is a 2-bit I/O port with a user-configurable output type. During reset
Port 3 latches are configured in the input-only mode with the internal pull-up
disabled. The operation of Port 3 pins as inputs and outputs depends upon the port
configuration selected. Each port pin is configured independently. Refer to Section
7.16.1 “Port configurations” and Table 11 “Static characteristics” for details.
DIP20,
TSSOP20
P1.7/T3EX/MOSI
2
P3.0 to P3.1
All pins have Schmitt trigger inputs.
Port 3 also provides various special functions as described below:
P3.0/XTAL2/
CLKOUT
P3.1/XTAL1
7
6
I/O
P3.0 — Port 3 bit 0.
O
XTAL2 — Output from the oscillator amplifier (when a crystal oscillator option is
selected via the flash configuration.
O
CLKOUT — CPU clock divided by 2 when enabled via SFR bit (ENCLK -TRIM.6).
It can be used if the CPU clock is the internal RC oscillator, watchdog oscillator or
external clock input, except when XTAL1/XTAL2 are used to generate clock source
for the RTC/system timer.
I/O
P3.1 — Port 3 bit 1.
I
XTAL1 — Input to the oscillator circuit and internal clock generator circuits (when
selected via the flash configuration). It can be a port pin if internal RC oscillator or
watchdog oscillator is used as the CPU clock source, and if XTAL1/XTAL2 are not
used to generate the clock for the RTC/system timer.
VSS
5
I
Ground: 0 V reference.
VDD
15
I
Power supply: This is the power supply voltage for normal operation as well as
Idle and Power-down modes.
[1]
Input/output for P1.0 to P1.4, P1.6, P1.7. Input for P1.5.
P89LPC97X
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
9 of 66
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
7. Functional description
Remark: Please refer to the P89LPC970/971/972 User manual for a more detailed
functional description.
7.1 Special function registers
Remark: SFR accesses are restricted in the following ways:
• User must not attempt to access any SFR locations not defined.
• Accesses to any defined SFR locations must be strictly for the functions for the SFRs.
• SFR bits labeled ‘-’, ‘0’ or ‘1’ can only be written and read as follows:
– ‘-’ Unless otherwise specified, must be written with ‘0’, but can return any value
when read (even if it was written with ‘0’). It is a reserved bit and may be used in
future derivatives.
– ‘0’ must be written with ‘0’, and will return a ‘0’ when read.
– ‘1’ must be written with ‘1’, and will return a ‘1’ when read.
P89LPC97X
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
10 of 66
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xxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxx xxxxxxxxxxxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxx x x
Name
Description
SFR
addr.
Bit functions and addresses
Reset value
Binary
00
0000 000
0
00
0000 00x0
F0H
00
0000 000
0
BRGR0[1] Baud rate
generator 0 rate
low
BEH
00
0000 000
0
BRGR1[1] Baud rate
generator 0 rate
high
BFH
00
0000 000
0
BRGCO
N
Baud rate
generator 0
control
BDH
-
-
-
-
-
-
SBRGS
BRGEN
00[1]
xxxx xx00
CMP1
Comparator 1
control register
ACH
-
-
CE1
CP1
CN1
OE1
CO1
CMF1
00[2]
xx00 0000
CMP2
Comparator 2
control register
ADH
-
-
CE2
CP2
CN2
OE2
CO2
CMF2
00[2]
xx00 0000
DIVM
CPU clock
divide-by-M
control
95H
00
0000 000
0
DPTR
Data pointer
(2 bytes)
Bit address
Accumulator
E0H
AUXR1
Auxiliary
function register
A2H
Bit address
B*
B register
MSB
E7
LSB
E6
E5
E4
E3
E2
E1
E0
CLKLP
EBRR
ENT1
ENT0
SRST
0
-
DPS
F7
F6
F5
F4
F3
F2
F1
F0
11 of 66
© NXP B.V. 2010. All rights reserved.
Data pointer
high
83H
00
0000 000
0
DPL
Data pointer low
82H
00
0000 000
0
FMADRH Program flash
address high
E7H
00
0000 000
0
FMADRL Program flash
address low
E6H
00
0000 000
0
8-bit microcontroller with accelerated two-clock 80C51 core
Rev. 3 — 8 June 2010
All information provided in this document is subject to legal disclaimers.
DPH
P89LPC970/971/972
Hex
ACC*
NXP Semiconductors
P89LPC97X
Product data sheet
Table 4.
Special function registers
* indicates SFRs that are bit addressable.
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx
Name
FMCON
Description
SFR
addr.
Bit functions and addresses
Reset value
MSB
LSB
Binary
70
0111 0000
00
0000 000
0
00
0000 000
0
00
x000 00x0
-
-
-
HVA
HVE
SV
OI
Program flash
control (Write)
E4H
FMCMD.
7
FMCMD.
6
FMCMD.
5
FMCMD.
4
FMCMD.
3
FMCMD.
2
FMCMD.
1
FMCMD.
0
FMDATA
Program flash
data
E5H
I2ADR
I2C-bus slave
address register
DBH
I2CON*
I2C-bus control
register
D8H
I2DAT
I2C-bus data
register
DAH
I2SCLH
Serial clock
generator/SCL
duty cycle
register high
DDH
00
0000 000
0
I2SCLL
Serial clock
generator/SCL
duty cycle
register low
DCH
00
0000 000
0
I2STAT
I2C-bus status
register
D9H
F8
1111 1000
00
0000 000
0
00[2]
00x0 0000
Rev. 3 — 8 June 2010
Bit address
IEN0*
Interrupt
enable 0
A8H
Bit address
12 of 66
© NXP B.V. 2010. All rights reserved.
IEN1*
Interrupt
enable 1
E8H
Bit address
I2ADR.5
I2ADR.4
I2ADR.3
I2ADR.2
I2ADR.1
I2ADR.0
GC
DF
DE
DD
DC
DB
DA
D9
D8
-
I2EN
STA
STO
SI
AA
-
CRSEL
STA.4
STA.3
STA.2
STA.1
STA.0
0
0
0
AF
AE
AD
AC
AB
AA
A9
A8
EA
EWDRT
EBO
ES/ESR
ET1
EX1
ET0
EX0
EF
EE
ED
EC
EB
EA
E9
E8
-
EST
-
EXTIM
ESPI
EC
EKBI
EI2C
BF
BE
BD
BC
BB
BA
B9
B8
IP0*
Interrupt
priority 0
B8H
-
PWDRT
PBO
PS/PSR
PT1
PX1
PT0
PX0
00[2]
x000 0000
IP0H
Interrupt
priority 0 high
B7H
-
PWDRTH
PBOH
PSH/
PSRH
PT1H
PX1H
PT0H
PX0H
00[2]
x000 0000
P89LPC970/971/972
BUSY
8-bit microcontroller with accelerated two-clock 80C51 core
E4H
Bit address
All information provided in this document is subject to legal disclaimers.
Hex
Program flash
control (Read)
I2ADR.6
NXP Semiconductors
P89LPC97X
Product data sheet
Table 4.
Special function registers …continued
* indicates SFRs that are bit addressable.
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xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx
Name
Description
SFR
addr.
Bit address
Bit functions and addresses
Reset value
MSB
LSB
Hex
Binary
FF
FE
FD
FC
FB
FA
F9
F8
IP1*
Interrupt
priority 1
F8H
-
PST
-
PXTIM
PSPI
PC
PKBI
PI2C
00[2]
00x0 0000
IP1H
Interrupt
priority 1 high
F7H
-
PSTH
-
PXTIMH
PSPIH
PCH
PKBIH
PI2CH
00[2]
00x0 0000
KBCON
Keypad control
register
94H
-
-
-
-
-
-
PATN
_SEL
KBIF
00[2]
xxxx xx00
86H
00
0000 000
0
KBPATN
93H
FF
1111 1111
Bit address
P0*
Port 0
80H
Bit address
P1*
Port 1
90H
Bit address
86
85
84
83
82
81
80
T1/KB7
CMP1/
KB6
CMPREF
/
KB5/T3
CIN1A/
KB4
CIN1B/
KB3/T2
CIN2A/
KB2
CIN2B/
KB1
CMP2/
KB0
97
96
95
94
93
92
91
90
T3EX
-
RST
INT1/
T4EX
INT0/
SDA/T4
T0/SCL
RXD/
T2EX
TXD
B7
B6
B5
B4
B3
B2
B1
B0
XTAL2
[2]
[2]
[2]
13 of 66
© NXP B.V. 2010. All rights reserved.
P3*
Port 3
B0H
-
-
-
-
-
-
XTAL1
P0M1
Port 0 output
mode 1
84H
(P0M1.7)
(P0M1.6)
(P0M1.5)
(P0M1.4)
(P0M1.3)
(P0M1.2)
(P0M1.1)
(P0M1.0) FF[2]
1111 1111
P0M2
Port 0 output
mode 2
85H
(P0M2.7)
(P0M2.6)
(P0M2.5)
(P0M2.4)
(P0M2.3)
(P0M2.2)
(P0M2.1)
(P0M2.0) 00[2]
0000 000
0
P1M1
Port 1 output
mode 1
91H
(P1M1.7)
(P1M1.6)
-
(P1M1.4)
(P1M1.3)
(P1M1.2)
(P1M1.1)
(P1M1.0) D3[2]
11x1 xx11
P1M2
Port 1 output
mode 2
92H
(P1M2.7)
(P1M2.6)
-
(P1M2.4)
(P1M2.3)
(P1M2.2)
(P1M2.1)
(P1M2.0) 00[2]
00x0 xx00
P3M1
Port 3 output
mode 1
B1H
-
-
-
-
-
-
(P3M1.1)
(P3M1.0) 03[2]
xxxx xx11
P3M2
Port 3 output
mode 2
B2H
-
-
-
-
-
-
(P3M2.1)
(P3M2.0) 00[2]
xxxx xx00
P89LPC970/971/972
87
8-bit microcontroller with accelerated two-clock 80C51 core
Rev. 3 — 8 June 2010
All information provided in this document is subject to legal disclaimers.
KBMASK Keypad interrupt
mask register
Keypad pattern
register
NXP Semiconductors
P89LPC97X
Product data sheet
Table 4.
Special function registers …continued
* indicates SFRs that are bit addressable.
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xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx
Name
Description
SFR
addr.
Bit functions and addresses
Reset value
MSB
LSB
Hex
Binary
00
0000 000
0
Power control
register
87H
SMOD1
SMOD0
-
BOI
GF1
GF0
PMOD1
PMOD0
PCONA
Power control
register A
B5H
RTCPD
-
VCPD
-
I2PD
SPPD
SPD
-
00[2]
0000 000
0
PINCON
pin remap
control register
CFH
-
-
-
-
-
-
SPI
-
00[2]
0000 000
0
PMUCO
N
Power
Management
Unit control
register
FAH
LPMOD
-
-
-
-
-
-
HCOK
D7
D6
D5
D4
D3
D2
D1
D0
0xxx xxx1
Program status
word
D0H
CY
AC
F0
RS1
RS0
OV
F1
P
00
0000 000
0
PT0AD
Port 0 digital
input disable
F6H
-
-
PT0AD.5
PT0AD.4
PT0AD.3
PT0AD.2
PT0AD.1
-
00
xx00 000x
PWMD2
H
PWM Free
Cycle register 2
high byte
AEH
00
0000 0000
PWMD2L PWM Free
Cycle register 2
low byte
AFH
00
0000 0000
PWMD3
H
PWM Free
Cycle register 3
high byte
E9H
00
0000 0000
PWMD3L PWM Free
Cycle register 3
low byte
EAH
00
0000 0000
PWMD4
H
PWM Free
Cycle register 4
high byte
AAH
00
0000 0000
PWMD4L PWM Free
Cycle register 4
low byte
ABH
00
0000 0000
RCAP2H Capture register
2 high byte
FCH
00
0000 0000
P89LPC970/971/972
14 of 66
© NXP B.V. 2010. All rights reserved.
PSW*
8-bit microcontroller with accelerated two-clock 80C51 core
Rev. 3 — 8 June 2010
All information provided in this document is subject to legal disclaimers.
PCON
Bit address
NXP Semiconductors
P89LPC97X
Product data sheet
Table 4.
Special function registers …continued
* indicates SFRs that are bit addressable.
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xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx
Name
RCAP2L
Description
SFR
addr.
Bit functions and addresses
Reset value
MSB
LSB
Hex
Binary
Capture register
2 low byte
FBH
00
0000 0000
RCAP3H Capture register
3 high byte
ECH
00
0000 0000
RCAP3L
Capture register
3 low byte
EBH
00
0000 0000
RCAP4H Capture register
4 high byte
CAH
00
0000 0000
RCAP4L
C9H
00
0000 0000
[3]
DFH
-
BOIF
BORF
POF
R_KB
R_WD
R_SF
R_EX
RTCCON RTC control
D1H
RTCF
RTCS1
RTCS0
-
-
-
ERTC
RTCEN
RTCH
RTC register
high
D2H
00[4]
0000 000
0
RTCL
RTC register
low
D3H
00[4]
0000 000
0
SADDR
Serial port
address register
A9H
00
0000 000
0
SADEN
Serial port
address enable
B9H
00
0000 000
0
SBUF
Serial port data
buffer register
99H
xx
xxxx xxxx
Bit address
9F
9E
9D
9C
9B
9A
99
98
60[2][4] 011x xx00
15 of 66
© NXP B.V. 2010. All rights reserved.
SCON*
Serial port
control
98H
SM0/FE
SM1
SM2
REN
TB8
RB8
TI
RI
00
0000 000
0
SSTAT
Serial port
extended status
register
BAH
DBMOD
INTLO
CIDIS
DBISEL
FE
BR
OE
STINT
00
0000 000
0
SP
Stack pointer
81H
07
0000 0111
SPCTL
SPI control
register
E2H
04
0000 010
0
SSIG
SPEN
DORD
MSTR
CPOL
CPHA
SPR1
SPR0
P89LPC970/971/972
RSTSRC Reset source
register
8-bit microcontroller with accelerated two-clock 80C51 core
Rev. 3 — 8 June 2010
All information provided in this document is subject to legal disclaimers.
Capture register
4 low byte
NXP Semiconductors
P89LPC97X
Product data sheet
Table 4.
Special function registers …continued
* indicates SFRs that are bit addressable.
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx
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xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx
Name
Description
SFR
addr.
SPSTAT
SPI status
register
E1H
SPDAT
SPI data
register
E3H
TAMOD
Timer 0 and 1
auxiliary mode
8FH
Bit address
Bit functions and addresses
Reset value
MSB
SPIF
LSB
WCOL
-
-
-
-
-
-
-
-
-
T1M2
-
-
-
T0M2
8F
8E
8D
8C
8B
8A
89
88
TF1
TR1
TF0
TR0
IE1
IT1
IE0
IT0
Hex
Binary
00
00xx xxxx
00
0000 000
0
00
xxx0 xxx0
00
0000 000
0
88H
TH0
Timer 0 high
8CH
00
0000 000
0
TH1
Timer 1 high
8DH
00
0000 000
0
TL0
Timer 0 low
8AH
00
0000 000
0
TL1
Timer 1 low
8BH
00
0000 000
0
TMOD
Timer 0 and 1
mode
89H
T1GATE
T1C/T
T1M1
T1M0
T0GATE
T0C/T
T0M1
00
0000 0000
T2CON
Timer/Counter 2
control
FFH
PSEL2
ENT2
TIEN2
PWM2
EXEN2
TR2
C/NT2
TH2
Timer/Counter 2
high byte
TL2
T0M0
16 of 66
© NXP B.V. 2010. All rights reserved.
CP/NRL2 00
0000 000
0
FEH
00
0000 000
0
Timer/Counter 2
low byte
FDH
00
0000 0000
T3CON
Timer/Counter 3
control
EFH
TH3
Timer/Counter 3
high byte
TL3
T4CON
CP/NRL3 00
0000 000
0
EEH
00
0000 000
0
Timer/Counter 3
low byte
EDH
00
0000 0000
Timer/Counter 2
control
CDH
PSEL4
ENT3
ENT4
TIEN3
TIEN4
PWM3
PWM4
EXEN3
EXEN4
TR3
TR4
C/NT3
C/NT4
CP/NRL4 00
0000 000
0
P89LPC970/971/972
Timer 0 and 1
control
8-bit microcontroller with accelerated two-clock 80C51 core
Rev. 3 — 8 June 2010
All information provided in this document is subject to legal disclaimers.
TCON*
PSEL3
NXP Semiconductors
P89LPC97X
Product data sheet
Table 4.
Special function registers …continued
* indicates SFRs that are bit addressable.
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx
Name
Description
SFR
addr.
Bit functions and addresses
Reset value
MSB
LSB
Hex
Binary
Timer/Counter 4
high byte
CCH
00
0000 000
0
TL4
Timer/Counter 4
low byte
CBH
00
0000 0000
TINTF
Timer/Counters
2/3/4 overflow
and external
flags
CEH
-
-
TF4
EXF4
TF3
EXF3
TF2
EXF2
00
0000 000
0
TRIM
Internal
oscillator trim
register
96H
RCCLK
ENCLK
TRIM.5
TRIM.4
TRIM.3
TRIM.2
TRIM.1
TRIM.0
[4][5]
WDCON
Watchdog
control register
A7H
PRE2
PRE1
PRE0
-
-
WDRUN
WDTOF
WDCLK
[4][6]
WDL
Watchdog load
C1H
C2H
WFEED2 Watchdog
feed 2
C3H
[1]
FF
1111 1111
BRGR1 and BRGR0 must only be written if BRGEN in BRGCON SFR is logic 0. If any are written while BRGEN = 1, the result is unpredictable.
All ports are in input only (high-impedance) state after power-up.
[3]
The RSTSRC register reflects the cause of the P89LPC970/971/972 reset except BOIF bit. Upon a power-up reset, all reset source flags are cleared except POF and BOF; the
power-on reset value is x011 0000.
[4]
The only reset sources that affect these SFRs are power-on reset and watchdog reset.
[5]
On power-on reset and watchdog reset, the TRIM SFR is initialized with a factory preprogrammed value. Other resets will not cause initialization of the TRIM register.
[6]
After reset, the value is 1110 01x1, i.e., PRE2 to PRE0 are all logic 1, WDRUN = 1 and WDCLK = 1. WDTOF bit is logic 1 after watchdog reset and is logic 0 after power-on reset.
Other resets will not affect WDTOF.
17 of 66
© NXP B.V. 2010. All rights reserved.
P89LPC970/971/972
[2]
8-bit microcontroller with accelerated two-clock 80C51 core
Rev. 3 — 8 June 2010
All information provided in this document is subject to legal disclaimers.
TH4
WFEED1 Watchdog
feed 1
NXP Semiconductors
P89LPC97X
Product data sheet
Table 4.
Special function registers …continued
* indicates SFRs that are bit addressable.
xxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx x xxxxxxxxxxxxxx xxxxxxxxxx xxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx
xxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxx xxxxxxxxxxxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxx x x
Extended special function registers[1]
Name
Description
SFR addr. Bit functions and addresses
Reset value
MSB
LSB
Hex
Binary
[2]
BOD
configuration
register
FFC8H
-
-
-
-
-
CLKCON
Clock control
register
FFDEH
CLKOK
-
WDMOD
XTALWD
CLKDBL
FOSC2
FOSC1
FOSC0
[3]
1000 xxxx
CMPREF
Comparator
reference
register
FFCBH
-
REFS5
REFS4
REFS3
-
REFS2
REFS1
REFS0
00
0000
0000
RTCDAT
H
Real-time
clock data
register high
FFBFH
00
0000
0000
FFBEH
00
0000
0000
BOICFG2 BOICFG1 BOICFG0
[1]
Extended SFRs are physically located on-chip but logically located in external data memory address space (XDATA). The MOVX A,@DPTR and MOVX @DPTR,A
instructions are used to access these extended SFRs.
[2]
The BOICFG2/1/0 will be copied from UCFG1.5 to UCFG1.3 when power-on reset.
[3]
CLKCON register reset value comes from UCFG1. The reset value of CLKCON.2 to CLKCON.0 come from UCFG1.2 to UCFG1.0 and reset value of CLKDBL bit comes
from UCFG1.7.
P89LPC970/971/972
18 of 66
© NXP B.V. 2010. All rights reserved.
8-bit microcontroller with accelerated two-clock 80C51 core
Rev. 3 — 8 June 2010
All information provided in this document is subject to legal disclaimers.
BODCFG
RTCDATL Real-time
clock data
register low
NXP Semiconductors
P89LPC97X
Product data sheet
Table 5.
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
7.2 Enhanced CPU
The P89LPC970/971/972 uses an enhanced 80C51 CPU which runs at six times the
speed of standard 80C51 devices. A machine cycle consists of two CPU clock cycles, and
most instructions execute in one or two machine cycles.
7.3 Clocks
7.3.1 Clock definitions
The P89LPC970/971/972 device has several internal clocks as defined below:
OSCCLK — Input to the DIVM clock divider. OSCCLK is selected from one of four clock
sources (see Figure 5) and can also be optionally divided to a slower frequency (see
Section 7.11 “CCLK modification: DIVM register”).
Remark: fosc is defined as the OSCCLK frequency.
CCLK — CPU clock; output of the clock divider. There are two CCLK cycles per machine
cycle, and most instructions are executed in one to two machine cycles (two or four CCLK
cycles).
RCCLK — The internal 7.373 MHz RC oscillator output. The clock doubler option, when
enabled, provides an output frequency of 14.746 MHz.
PCLK — Clock for the various peripheral devices and is CCLK⁄2.
7.3.2 CPU clock (OSCCLK)
The P89LPC970/971/972 provides several user-selectable oscillator options in generating
the CPU clock. This allows optimization for a range of needs from high precision to lowest
possible cost. These options are configured when the flash is programmed and include an
on-chip watchdog oscillator, an on-chip RC oscillator, an oscillator using an external
crystal, or an external clock source.
7.4 Crystal oscillator option
The crystal oscillator option can be optimized for low, medium, or high frequency crystals
covering a range from 20 kHz to 18 MHz. It can be the clock source of OSCCLK and RTC.
The low speed oscillator option can be the clock source of the WDT.
7.4.1 Low speed oscillator option
This option supports an external crystal in the range of 20 kHz to 100 kHz. Ceramic
resonators are also supported in this configuration.
7.4.2 Medium speed oscillator option
This option supports an external crystal in the range of 100 kHz to 4 MHz. Ceramic
resonators are also supported in this configuration.
7.4.3 High speed oscillator option
This option supports an external crystal in the range of 4 MHz to 18 MHz. Ceramic
resonators are also supported in this configuration.
P89LPC97X
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
19 of 66
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
7.5 Clock output
The P89LPC970/971/972 supports a user-selectable clock output function on the
P3.0/XTAL2/CLKOUT pin when crystal oscillator is not being used. This condition occurs
if another clock source has been selected (on-chip RC oscillator, watchdog oscillator,
external clock input on XTAL1) and if the RTC and WDT are not using the crystal oscillator
as their clock source. This allows external devices to synchronize to the
P89LPC970/971/972. This output is enabled by the ENCLK bit in the TRIM register.
The frequency of this clock output is 1⁄2 that of the CCLK. If the clock output is not needed
in Idle mode, it may be turned off prior to entering Idle, saving additional power.
7.6 On-chip RC oscillator option
The P89LPC970/971/972 has a 6-bit TRIM register that can be used to tune the
frequency of the RC oscillator. During reset, the TRIM value is initialized to a factory
preprogrammed value to adjust the oscillator frequency to 7.373 MHz ± 1 % at room
temperature. End-user applications can write to the TRIM register to adjust the on-chip
RC oscillator to other frequencies. When the clock doubler option is enabled (UCFG2.7 =
1), the output frequency is 14.746 MHz. If CCLK is 8 MHz or slower, the CLKLP SFR bit
(AUXR1.7) can be set to logic 1 to reduce power consumption. On reset, CLKLP is logic 0
allowing highest performance access. This bit can then be set in software if CCLK is
running at 8 MHz or slower. When clock doubler option is enabled, BOE0 to BOE2 bits
(UCFG1[3:5]) are required to hold the device in reset at power-up until VDD has reached
its specified level.
7.7 Watchdog oscillator option
The watchdog has a separate oscillator which provides two options: 400 kHz and 25 kHz.
It is calibrated to ±10 % at 400 kHz. The oscillator can be used to save power when a high
clock frequency is not needed.
7.8 External clock input option
In this configuration, the processor clock is derived from an external source driving the
P3.1/XTAL1 pin. The rate may be from 0 Hz up to 18 MHz. The P3.0/XTAL2/CLKOUT pin
may be used as a standard port pin or a clock output. When using an oscillator frequency
above 12 MHz, BOE0 to BOE2 bits (UCFG1[3:5]) are required to hold the device in reset
at power-up until VDD has reached its specified level.
7.9 Clock source switching on the fly
P89LPC970/971/972 can implement clock switching on any sources of watchdog
oscillator, 7 MHz/14 MHz internal RC oscillator, crystal oscillator and external clock input
during code is running. CLKOK bit in CLKCON register is used to indicate the clock switch
status. CLKOK is cleared when starting clock source switch and set when completed.
Notice that when CLKOK is ‘0’, writing to CLKCON register is not allowed.
P89LPC97X
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
20 of 66
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
HIGH FREQUENCY
MEDIUM FREQUENCY
LOW FREQUENCY
XTAL1
XTAL2
RTC
OSCCLK
RC OSCILLATOR
WITH CLOCK DOUBLER
DIVM
RCCLK
CCLK
CPU
÷2
PCLK
(7.3728 MHz/14.7456 MHz ± 1 %)
WDT
WATCHDOG
OSCILLATOR
PCLK
(400 kHz/25 kHz ± 10 %)
TIMER 0/
TIMER 1
TIMER 2/
TIMER 3/
TIMER 4
SPI(1)
UART
I2C-BUS
002aae554
(1) ±10 % at 400 kHz.
Fig 5.
Block diagram of oscillator control
7.10 CCLK wake-up delay
The P89LPC970/971/972 has an internal wake-up timer that delays the clock until it
stabilizes depending on the clock source used. If the clock source is any of the three
crystal selections (low, medium and high frequencies) the delay is 1024 OSCCLK cycles
plus 60 μs to 100 μs. If the clock source is the internal RC oscillator, the delay is 200 μs to
300 μs. If the clock source is watchdog oscillator or external clock, the delay is
32 OSCCLK cycles.
7.11 CCLK modification: DIVM register
The OSCCLK frequency can be divided down up to 510 times by configuring a dividing
register, DIVM, to generate CCLK. This feature makes it possible to temporarily run the
CPU at a lower rate, reducing power consumption. By dividing the clock, the CPU can
retain the ability to respond to events that would not exit Idle mode by executing its normal
program at a lower rate. This can also allow bypassing the oscillator start-up time in cases
where Power-down mode would otherwise be used. The value of DIVM may be changed
by the program at any time without interrupting code execution.
7.12 Low power select
The P89LPC970/971/972 is designed to run at 18 MHz (CCLK) maximum. However, if
CCLK is 8 MHz or slower, the CLKLP SFR bit (AUXR1.7) can be set to logic 1 to lower the
power consumption further. On any reset, CLKLP is logic 0 allowing highest performance
access. This bit can then be set in software if CCLK is running at 8 MHz or slower.
P89LPC97X
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
21 of 66
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
7.13 Memory organization
The various P89LPC970/971/972 memory spaces are as follows:
• DATA
128 bytes of internal data memory space (00H:7FH) accessed via direct or indirect
addressing, using instructions other than MOVX and MOVC. All or part of the Stack
may be in this area.
• IDATA
Indirect Data. 256 bytes of internal data memory space (00H:FFH) accessed via
indirect addressing using instructions other than MOVX and MOVC. All or part of the
Stack may be in this area. This area includes the DATA area and the 128 bytes
immediately above it.
• SFR
Special Function Registers. Selected CPU registers and peripheral control and status
registers, accessible only via direct addressing.
• XDATA
‘External’ Data or Auxiliary RAM. Duplicates the classic 80C51 64 kB memory space
addressed via the MOVX instruction using the DPTR, R0, or R1. All or part of this
space could be implemented on-chip.
• CODE
64 kB of Code memory space, accessed as part of program execution and via the
MOVC instruction. The P89LPC970/971/972 has 4 kB/8 kB of on-chip Code memory.
7.14 Data RAM arrangement
The 768 bytes of on-chip RAM are organized as shown in Table 6.
Table 6.
On-chip data memory usages
Type
Data RAM
Size (bytes)
DATA
Memory that can be addressed directly and indirectly
128
IDATA
Memory that can be addressed indirectly
256
XDATA
Auxiliary (External Data) on-chip memory that is accessed
using the MOVX instructions
256
7.15 Interrupts
The P89LPC970/971/972 uses a four priority level interrupt structure. This allows great
flexibility in controlling the handling of the many interrupt sources. The
P89LPC970/971/972 supports 15 interrupt sources: external interrupts 0 and 1, Timers 0
and 1, Timer 2/3/4, serial port TX, serial port RX, combined serial port RX/TX, brownout
detect, watchdog/RTC, I2C-bus, keyboard, comparators 1 and 2, SPI.
Each interrupt source can be individually enabled or disabled by setting or clearing a bit in
the interrupt enable registers IEN0 or IEN1. The IEN0 register also contains a global
disable bit, EA, which disables all interrupts.
Each interrupt source can be individually programmed to one of four priority levels by
setting or clearing bits in the interrupt priority registers IP0, IP0H, IP1 and IP1H. An
interrupt service routine in progress can be interrupted by a higher priority interrupt, but
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not by another interrupt of the same or lower priority. The highest priority interrupt service
cannot be interrupted by any other interrupt source. If two requests of different priority
levels are pending at the start of an instruction, the request of higher priority level is
serviced.
If requests of the same priority level are pending at the start of an instruction, an internal
polling sequence determines which request is serviced. This is called the arbitration
ranking. Note that the arbitration ranking is only used to resolve pending requests of the
same priority level.
7.15.1 External interrupt inputs
The P89LPC970/971/972 has two external interrupt inputs as well as the Keypad Interrupt
function. The two interrupt inputs are identical to those present on the standard 80C51
microcontrollers.
These external interrupts can be programmed to be level-triggered or edge-triggered by
setting or clearing bit IT1 or IT0 in Register TCON.
In edge-triggered mode, if successive samples of the INTn pin show a HIGH in one cycle
and a LOW in the next cycle, the interrupt request flag IEn in TCON is set, causing an
interrupt request.
If an external interrupt is enabled when the P89LPC970/971/972 is put into Power-down
or Idle mode, the interrupt will cause the processor to wake-up and resume operation.
Refer to Section 7.17.3 “Power reduction modes” for details.
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IE0
EX0
IE1
EX1
BOIF
EBO
RTCF
ERTC
wake-up
(if in power-down)
KBIF
EKBI
WDOVF
EWDRT
CMF2
CMF1
EC
EA (IE0.7)
TF0
ET0
TF1
ET1
TI and RI/RI
ES/ESR
TI
EST
interrupt
to CPU
SI
EI2C
SPIF(1)
ESPI(1)
TF2
EXF2
TIEN2
TF3
EXF3
TIEN3
TF4
EXF4
TIEN4
EXTIM
002aae555
(1) For pin remap.
Fig 6.
Interrupt sources, interrupt enables, and power-down wake-up sources
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7.16 I/O ports
The P89LPC970/971/972 has four I/O ports: Port 0, Port 1 and Port 3. Ports 0, 1 are 8-bit
ports, and Port 3 is a 2-bit port. The exact number of I/O pins available depends upon the
clock and reset options chosen, as shown in Table 7.
Table 7.
Number of I/O pins available
Clock source
Reset option
Number of I/O
pins (20-pin
package)
On-chip oscillator or watchdog
oscillator
no external reset (except during
power-up)
18
external RST pin supported
17
External clock input
no external reset (except during
power-up)
17
external RST pin supported
16
no external reset (except during
power-up)
16
external RST pin supported
15
Low/medium/high speed
oscillator (external crystal or
resonator)
7.16.1 Port configurations
All but three I/O port pins on the P89LPC970/971/972 may be configured by software to
one of four types on a bit-by-bit basis. These are: quasi-bidirectional (standard 80C51 port
outputs), push-pull, open drain, and input-only. Two configuration registers for each port
select the output type for each port pin.
1. P1.5/RST can only be an input and cannot be configured.
2. P1.2/SCL/T0 and P1.3/INT0/SDA/T4 may only be configured to be either input-only or
open-drain.
7.16.1.1
Quasi-bidirectional output configuration
Quasi-bidirectional output type can be used as both an input and output without the need
to reconfigure the port. This is possible because when the port outputs a logic HIGH, it is
weakly driven, allowing an external device to pull the pin LOW. When the pin is driven
LOW, it is driven strongly and able to sink a fairly large current. These features are
somewhat similar to an open-drain output except that there are three pull-up transistors in
the quasi-bidirectional output that serve different purposes.
A quasi-bidirectional port pin has a Schmitt trigger input that also has a glitch suppression
circuit.
7.16.1.2
Open-drain output configuration
The open-drain output configuration turns off all pull-ups and only drives the pull-down
transistor of the port driver when the port latch contains a logic 0. To be used as a logic
output, a port configured in this manner must have an external pull-up, typically a resistor
tied to VDD.
An open-drain port pin has a Schmitt trigger input that also has a glitch suppression
circuit.
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7.16.1.3
Input-only configuration
The input-only port configuration has no output drivers. It is a Schmitt trigger input that
also has a glitch suppression circuit.
7.16.1.4
Push-pull output configuration
The push-pull output configuration has the same pull-down structure as both the
open-drain and the quasi-bidirectional output modes, but provides a continuous strong
pull-up when the port latch contains a logic 1. The push-pull mode may be used when
more source current is needed from a port output. A push-pull port pin has a
Schmitt triggered input that also has a glitch suppression circuit. The P89LPC970/971/972
device has high current source on eight pins in push-pull mode. See Table 10 “Limiting
values”.
7.16.2 Port 0 analog functions
The P89LPC970/971/972 incorporates two Analog Comparators. In order to give the best
analog function performance and to minimize power consumption, pins that are being
used for analog functions must have the digital outputs and digital inputs disabled.
Digital outputs are disabled by putting the port output into the input-only (high-impedance)
mode.
Digital inputs on Port 0 may be disabled through the use of the PT0AD register, bits 1:5.
On any reset, PT0AD[1:5] defaults to logic 0s to enable digital functions.
7.16.3 Additional port features
After power-up, all pins are in input-only mode. Please note that this is different from
the LPC76x series of devices.
• After power-up, all I/O pins except P1.5, may be configured by software.
• Pin P1.5 is input only. Pins P1.2 and P1.3 are configurable for either input-only or
open-drain.
Every output on the P89LPC970/971/972 has been designed to sink typical LED drive
current. However, there is a maximum total output current for all ports which must not be
exceeded. Please refer to Table 11 “Static characteristics” for detailed specifications.
All ports pins that can function as an output have slew rate controlled outputs to limit noise
generated by quickly switching output signals. The slew rate is factory-set to
approximately 10 ns rise and fall times.
7.16.4 Pin remap
This feature allows the functions of UART/I2C/SPI to be remapped to other pins.
Configuration register controls the multiplexers to allow connection between the pins and
the on chip peripherals. See Table 8 “SPI/I2C/UART pin remap”.
UART/I2C/SPI, each has two options of pin configuration: primary pin map and alternative
pin map. After reset, UART/I2C/SPI chooses the primary pin map as default. User can
adjust to the alternative pin map through configuring PINCON register according to the
application.
Please refer to P89LPC970/971/972 User manual for detail configurations.
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Table 8.
SPI/I2C/UART pin remap
Peripherals
Function
Primary pin out
Alternative pin out
SPI
SPICLK
-
P0.0
MOSI
-
P1.7
MISO
-
P1.6
SS
-
P1.4
I2C
SDA
P1.3
-
SCL
P1.2
-
UART
TXD
P1.0
-
RXD
P1.1
-
7.17 Power management
The P89LPC970/971/972 support a variety of power management features.
Power-on detect and brownout detect are designed to prevent incorrect operation during
initial power-up and power loss or reduction during operation.
The P89LPC970/971/972 support three different power reduction modes: Idle mode,
Power-down mode, and total Power-down mode. In addition, individual on-chip
peripherals can be disabled to eliminate unnecessary dynamic power use in any
peripherals that are not required for the application.
Integrated PMU automatically adjusts internal regulators to minimize power consumption
during Idle mode, Power-down mode and total Power-down mode. In addition, the power
consumption can be further reduced in Normal or Idle mode through configuring
regulators mode according to the applications.
7.17.1 Brownout detection
The brownout detect function determines if the power supply voltage drops below a
certain level. Enhanced brownout detection has 3 independent functions: BOD reset,
BOD interrupt and BOD flash.
These three functions are disabled in Power-down mode and Total Power-down mode. In
Normal or Idle mode, BOD reset and BOD flash are always on and can not be disabled in
software. BOD interrupt may be enabled or disabled in software.
BOD reset and BOD interrupt, each has 6 levels. BOE0 to BOE2 (UCFG1[3:5]) are used
as trip point configuration bits of BOD reset. BOICFG0 to BOICFG2 in register BODCFG
are used as trip point configuration bits of BOD interrupt.
BOD reset voltage should be lower than BOD interrupt trip point. BOD flash is used for
flash programming/erase protection and has only 1 trip point at 2.4 V. Please refer to
P89LPC970/971/972 User manual for detail configurations.
If brownout detection works, the brownout condition occurs when VDD falls below the
brownout falling trip voltage and is negated when VDD rises above the brownout rising trip
voltage.
For correct activation of brownout detect, the VDD rise and fall times must be observed.
Please see Table 11 “Static characteristics” for specifications.
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7.17.2 Power-on detection
The Power-on detect has a function similar to the brownout detect, but is designed to work
as power comes up initially to ensure that the device is reset from Power-on. The POF
flag in the RSTSRC register is set to indicate an initial power-up condition. The POF flag
will remain set until cleared by software.
7.17.3 Power reduction modes
The P89LPC970/971/972 supports three different power reduction modes. These modes
are Idle mode, Power-down mode, and total Power-down mode.
7.17.3.1
Idle mode
Idle mode leaves peripherals running in order to allow them to activate the processor
when an interrupt is generated. Any enabled interrupt source or reset may terminate Idle
mode.
7.17.3.2
Power-down mode
The Power-down mode stops the oscillator in order to minimize power consumption.
Brownout detection circuitry is disabled. The P89LPC970/971/972 exits Power-down
mode via any reset, or certain interrupts.
Some chip functions continue to operate and draw power during Power-down mode,
increasing the total power used during power-down. These include: Brownout detect,
watchdog timer, comparators and RTC/system timer (note that watchdog timer,
comparators and RTC/system timer can be powered down separately). The internal RC
oscillator is disabled unless both the RC oscillator has been selected as the system clock
and the RTC is enabled.
7.17.3.3
Total Power-down mode
The total Power-down mode is a deeper power reduction mode. Brownout detection
circuitry and analog comparators are disabled, as well as the internal RC oscillator.
Please use an external low frequency clock or 25 kHz watchdog oscillator to achieve low
power with the RTC running during power-down.
7.17.4 Regulators
Internal regulators can be adjusted automatically to minimize power consumption during
different power reduction modes. In Normal or Idle modes, power consumption can be
further reduced by configuring PMUCON register.
In Normal or Idle mode, regulators have two operation modes: High-speed mode and Low
current mode.
The regulators can be configured to Low current mode to reduce the power consumption.
After power-on-reset, internal regulators enter into High-speed mode as default.
PMUCON register is used to configure the regulators operation modes. LPMOD bit is
used to select the regulator’s mode and HCOK bit indicates whether the switch completed
or not. When switching back to high speed mode, first clear LPMOD bit to select high
speed mode, then check HCOK bit. If HCOK bit turns to ‘1’, it means the switch was
completed.
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7.18 Reset
The P1.5/RST pin can function as either a LOW-active reset input or as a digital input,
P1.5. The Reset Pin Enable (RPE) bit in UCFG1, when set to logic 1, enables the external
reset input function on P1.5. When cleared, P1.5 may be used as an input pin.
Remark: During a power-up sequence, the RPE selection is overridden and this pin
always functions as a reset input. An external circuit connected to this pin should not
hold this pin LOW during a power-on sequence as this will keep the device in reset.
After power-up this pin will function as defined by the RPE bit. Only a power-up reset will
temporarily override the selection defined by RPE bit. Other sources of reset will not
override the RPE bit.
Reset can be triggered from the following sources:
•
•
•
•
•
•
External reset pin (during power-up or if user configured via UCFG1)
Power-on detect
Brownout detect
Watchdog timer
Software reset
UART break character detect reset
For every reset source, there is a flag in the Reset Register, RSTSRC. The user can read
this register to determine the most recent reset source. These flag bits can be cleared in
software by writing a logic 0 to the corresponding bit. More than one flag bit may be set:
• During a power-on reset, both POF and BOF are set but the other flag bits are
cleared.
• A Watchdog reset is similar to a power-on reset, both POF and BOF are set but the
other flag bits are cleared.
• For any other reset, previously set flag bits that have not been cleared will remain set.
7.18.1 Reset vector
Following reset, the P89LPC970/971/972 will fetch instructions from either address 0000H
or the Boot address. The Boot address is formed by using the boot vector as the high byte
of the address and the low byte of the address = 00H.
The boot address will be used if a UART break reset occurs, or the non-volatile boot
status bit (BOOTSTAT.0) = 1, or the device is forced into ISP mode during power-on (see
P89LPC970/971/972 User manual). Otherwise, instructions will be fetched from address
0000H.
7.19 Timers/counters 0 and 1
The P89LPC970/971/972 has two general purpose counter/timers which are upward
compatible with the standard 80C51 Timer 0 and Timer 1. Both can be configured to
operate either as timers or event counters. An option to automatically toggle the T0 or T1
pins upon timer overflow has been added.
In the ‘Timer’ function, the register is incremented every machine cycle.
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In the ‘Counter’ function, the register is incremented in response to a 1-to-0 transition at its
corresponding count input pin, T0 or T1. In this function, the count input is sampled once
during every machine cycle.
Timer 0 and Timer 1 have five operating modes (Modes 0, 1, 2, 3 and 6). Modes 0, 1, 2
and 6 are the same for both Timers/Counters. Mode 3 is different.
7.19.1 Mode 0
Putting either Timer into Mode 0 makes it look like an 8048 Timer, which is an 8-bit
Counter with a divide-by-32 prescaler. In this mode, the Timer register is configured as a
13-bit register. Mode 0 operation is the same for Timer 0 and Timer 1.
7.19.2 Mode 1
Mode 1 is the same as Mode 0, except that all 16 bits of the timer register are used.
7.19.3 Mode 2
Mode 2 configures the Timer register as an 8-bit Counter with automatic reload. Mode 2
operation is the same for Timer 0 and Timer 1.
7.19.3.1
Mode 3
When Timer 1 is in Mode 3 it is stopped. Timer 0 in Mode 3 forms two separate 8-bit
counters and is provided for applications that require an extra 8-bit timer. When Timer 1 is
in Mode 3 it can still be used by the serial port as a baud rate generator.
7.19.3.2
Mode 6
In this mode, the corresponding timer can be changed to a PWM with a full period of
256 timer clocks.
7.19.4 Timer overflow toggle output
Timers 0 and 1 can be configured to automatically toggle a port output whenever a timer
overflow occurs. The same device pins that are used for the T0 and T1 count inputs are
also used for the timer toggle outputs. The port outputs will be a logic 1 prior to the first
timer overflow when this mode is turned on.
7.20 Timers/counters 2, 3 and 4
The P89LPC970/971/972 has three external 16-bit timer/counters. All can be configured
to operate either as timers or event counters. An option to automatically toggle pin Tx (x =
2, 3 or 4) upon timer overflow has been added.
In the ‘Timer’ function, the register is incremented every PCLK.
In the ‘Counter’ function, the register is incremented in response to a 1-to-0 transition at its
corresponding count input pin (T2/T3 /T4). In this function, the count input is sampled
once during every machine cycle.
Only external Timer 2/3/4 has the external input pin TxEX (x = 2, 3 or 4). A 1-to-0
transition on this pin can trigger a reload or capture event.
Timer 2, Timer 3 and Timer 4 have three operating modes (Modes 0, 1 and 2).
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7.20.1 Mode 0: 16-bit timer/counter with auto-reload
Mode 0 configures the timer register as an 16-bit Timer/counter with automatic reload. An
overflow upon the timer or a 1-to-0 transition at TxEX pin can cause the reload event.
7.20.2 Mode 1: 16-bit timer/counter with input capture
Mode 1 configures the timer register as an 16-bit Timer/counter with input capture. A
1-to-0 transition at TxEX pin can cause the capture event.
7.20.3 Mode 2: 16-bit PWM mode
In this mode, the corresponding timer can be changed to a 16-bit PWM generator with
adjustable duty cycle. In this mode, the corresponding timer can be changed to a 16-bit
PWM generator with adjustable duty cycle and adjustable full period (from 0, theoretically,
to 131072).
7.20.4 Timer overflow toggle output
Timers 2, 3 and 4 can be configured to automatically toggle a port output whenever a
timer overflow occurs. The same device pins that are used for the T2, T3 and T4 count
inputs are also used for the timer toggle outputs. The port outputs will be a logic 1 prior to
the first timer overflow when this mode is turned on.
7.21 RTC/system timer
The P89LPC970/971/972 has a simple RTC that allows a user to continue running an
accurate timer while the rest of the device is powered down. The RTC can be a wake-up
or an interrupt source. The RTC is a 23-bit down counter comprised of a 7-bit prescaler
and a 16-bit loadable down counter. When it reaches all logic 0s, the counter will be
reloaded again and the RTCF flag will be set. The clock source for this counter can be
either the CPU clock (CCLK) or the XTAL oscillator. Only power-on reset and watchdog
reset will reset the RTC and its associated SFRs to the default state.
The 16-bit loadable counter portion of the RTC is readable by reading the RTCDATL and
RTCDATH registers.
7.22 UART
The P89LPC970/971/972 has an enhanced UART that is compatible with the
conventional 80C51 UART except that Timer 2 overflow cannot be used as a baud rate
source. The P89LPC970/971/972 does include an independent baud rate generator. The
baud rate can be selected from the oscillator (divided by a constant), Timer 1 overflow, or
the independent baud rate generator. In addition to the baud rate generation,
enhancements over the standard 80C51 UART include Framing Error detection,
automatic address recognition, selectable double buffering and several interrupt options.
The UART can be operated in four modes: shift register, 8-bit UART, 9-bit UART, and CPU
clock/32 or CPU clock/16.
7.22.1 Mode 0
Serial data enters and exits through RXD. TXD outputs the shift clock. 8 bits are
transmitted or received, LSB first. The baud rate is fixed at 1⁄16 of the CPU clock
frequency.
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7.22.2 Mode 1
10 bits are transmitted (through TXD) or received (through RXD): a start bit (logic 0),
8 data bits (LSB first), and a stop bit (logic 1). When data is received, the stop bit is stored
in RB8 in special function register SCON. The baud rate is variable and is determined by
the Timer 1 overflow rate or the baud rate generator (described in Section 7.22.5 “Baud
rate generator and selection”).
7.22.3 Mode 2
11 bits are transmitted (through TXD) or received (through RXD): start bit (logic 0), 8 data
bits (LSB first), a programmable 9th data bit, and a stop bit (logic 1). When data is
transmitted, the 9th data bit (TB8 in SCON) can be assigned the value of logic 0 or logic 1.
Or, for example, the parity bit (P, in the PSW) could be moved into TB8. When data is
received, the 9th data bit goes into RB8 in special function register SCON, while the stop
bit is not saved. The baud rate is programmable to either 1⁄16 or 1⁄32 of the CPU clock
frequency, as determined by the SMOD1 bit in PCON.
7.22.4 Mode 3
11 bits are transmitted (through TXD) or received (through RXD): a start bit (logic 0), 8
data bits (LSB first), a programmable 9th data bit, and a stop bit (logic 1). In fact, Mode 3 is
the same as Mode 2 in all respects except baud rate. The baud rate in Mode 3 is variable
and is determined by the Timer 1 overflow rate or the baud rate generator (described in
Section 7.22.5 “Baud rate generator and selection”).
7.22.5 Baud rate generator and selection
The P89LPC970/971/972 enhanced UART has an independent baud rate generator. The
baud rate is determined by a baud-rate preprogrammed into the BRGR1 and BRGR0
SFRs which together form a 16-bit baud rate divisor value that works in a similar manner
as Timer 1 but is much more accurate. If the baud rate generator is used, Timer 1 can be
used for other timing functions.
The UART can use either Timer 1 or the baud rate generator output (see Figure 7). Note
that Timer T1 is further divided by 2 if the SMOD1 bit (PCON.7) is cleared. The
independent baud rate generators use OSCCLK.
timer 1 overflow
(PCLK-based)
SMOD1 = 1
SBRGS = 0
÷2
baud rate modes 1 and 3
SMOD1 = 0
baud rate generator
(CCLK-based)
Fig 7.
SBRGS = 1
002aaa897
Baud rate sources for UART (Modes 1, 3)
7.22.6 Framing error
Framing error is reported in the status register (SSTAT). In addition, if SMOD0 (PCON.6)
is logic 1, framing errors can be made available in SCON.7 respectively. If SMOD0 is
logic 0, SCON.7 is SM0. It is recommended that SM0 and SM1 (SCON.7:6) are set up
when SMOD0 is logic 0.
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7.22.7 Break detect
Break detect is reported in the status register (SSTAT). A break is detected when
11 consecutive bits are sensed LOW. The break detect can be used to reset the device
and force the device into ISP mode.
7.22.8 Double buffering
The UART has a transmit double buffer that allows buffering of the next character to be
written to SnBUF while the first character is being transmitted. Double buffering allows
transmission of a string of characters with only one stop bit between any two characters,
as long as the next character is written between the start bit and the stop bit of the
previous character.
Double buffering can be disabled. If disabled (DBMOD, i.e., SSTAT.7 = 0), the UART is
compatible with the conventional 80C51 UART. If enabled, the UART allows writing to
SBUF while the previous data is being shifted out. Double buffering is only allowed in
Modes 1, 2 and 3. When operated in Mode 0, double buffering must be disabled
(DBMOD = 0).
7.22.9 Transmit interrupts with double buffering enabled (modes 1, 2 and 3)
Unlike the conventional UART, in double buffering mode, the TI interrupt is generated
when the double buffer is ready to receive new data.
7.22.10 The 9th bit (bit 8) in double buffering (modes 1, 2 and 3)
If double buffering is disabled TB8 can be written before or after SBUF is written, as long
as TB8 is updated some time before that bit is shifted out. TB8 must not be changed until
the bit is shifted out, as indicated by the TI interrupt.
If double buffering is enabled, TB must be updated before SBUF is written, as TB8 will be
double-buffered together with SBUF data.
7.23 I2C-bus serial interface
The I2C-bus uses two wires (SDA and SCL) to transfer information between devices
connected to the bus, and it has the following features:
• Bidirectional data transfer between masters and slaves
• Multi master bus (no central master)
• Arbitration between simultaneously transmitting masters without corruption of serial
data on the bus
• Serial clock synchronization allows devices with different bit rates to communicate via
one serial bus
• Serial clock synchronization can be used as a handshake mechanism to suspend and
resume serial transfer
• The I2C-bus may be used for test and diagnostic purposes.
A typical I2C-bus configuration is shown in Figure 8. The P89LPC970/971/972 device
provides a byte-oriented I2C-bus interface that supports data transfers up to 400 kHz.
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RP
RP
SDA
I2C-bus
SCL
P1.3/SDA
P1.2/SCL
P89LPC970/971/972
OTHER DEVICE
WITH I2C-BUS
INTERFACE
OTHER DEVICE
WITH I2C-BUS
INTERFACE
002aaf092
Fig 8.
P89LPC97X
Product data sheet
I2C-bus configuration
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8
I2ADR
ADDRESS REGISTER
P1.3
COMPARATOR
INPUT
FILTER
P1.3/SDA
SHIFT REGISTER
OUTPUT
STAGE
ACK
I2DAT
BIT COUNTER /
ARBITRATION
AND SYNC LOGIC
INPUT
FILTER
P1.2/SCL
SERIAL CLOCK
GENERATOR
OUTPUT
STAGE
CCLK
TIMING
AND
CONTROL
LOGIC
interrupt
INTERNAL BUS
8
timer 1
overflow
P1.2
I2CON
I2SCLH
I2SCLL
CONTROL REGISTERS AND
SCL DUTY CYCLE REGISTERS
8
status bus
I2STAT
STATUS
DECODER
STATUS REGISTER
8
002aaa899
Fig 9.
P89LPC97X
Product data sheet
I2C-bus serial interface block diagram
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7.24 SPI (Pin remap)
The P89LPC970/971/972 provides another high-speed serial communication interface:
the SPI interface. SPI is a full-duplex, high-speed, synchronous communication bus with
two operation modes: Master mode and Slave mode. Up to 3 Mbit/s can be supported in
either Master mode or Slave mode. It has a Transfer Completion Flag and Write Collision
Flag Protection.
S
M
CPU clock
8-BIT SHIFT REGISTER
clock
MSTR
SPR0
SPICLK
P0.0
SS
P1.4
SPR0
SPR1
CPOL
CPHA
MSTR
SSIG
WCOL
DORD
MSTR
SPEN
SPI CONTROL
SPEN
SPR1
S
M
CLOCK LOGIC
MOSI
P1.7
SPEN
SPI clock (master)
SELECT
SPIF
PIN
CONTROL
LOGIC
READ DATA BUFFER
DIVIDER
BY 4, 16, 64, 128
MISO
P1.6
M
S
SPI CONTROL REGISTER
SPI STATUS REGISTER
SPI
interrupt
request
internal
data
bus
002aaf091
Fig 10. SPI block diagram
The SPI interface has four pins: SPICLK, MOSI, MISO and SS:
• SPICLK, MOSI and MISO are typically tied together between two or more SPI
devices. Data flows from master to slave on MOSI (Master Out Slave In) pin and flows
from slave to master on MISO (Master In Slave Out) pin. The SPICLK signal is output
in the Master mode and is input in the Slave mode. If the SPI system is disabled, i.e.,
SPEN (SPCTL.6) = 0 (reset value), these pins are configured for port functions.
• SS is the optional slave select pin. In a typical configuration, an SPI master asserts
one of its port pins to select one SPI device as the current slave. An SPI slave device
uses its SS pin to determine whether it is selected.
Typical connections are shown in Figure 11 through Figure 13.
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7.24.1 Typical SPI configurations
master
8-BIT SHIFT
REGISTER
slave
MISO
MISO
MOSI
MOSI
SPICLK
SPI CLOCK
GENERATOR
PORT
8-BIT SHIFT
REGISTER
SPICLK
SS
002aaa901
Fig 11. SPI single master single slave configuration
master
8-BIT SHIFT
REGISTER
slave
MISO
MISO
MOSI
MOSI
SPICLK
SPI CLOCK
GENERATOR
SS
8-BIT SHIFT
REGISTER
SPICLK
SS
SPI CLOCK
GENERATOR
002aaa902
Fig 12. SPI dual device configuration, where either can be a master or a slave
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master
slave
8-BIT SHIFT
REGISTER
MISO
MISO
MOSI
MOSI
SPICLK
SPI CLOCK
GENERATOR
port
8-BIT SHIFT
REGISTER
SPICLK
SS
slave
MISO
MOSI
8-BIT SHIFT
REGISTER
SPICLK
port
SS
002aaa903
Fig 13. SPI single master multiple slaves configuration
7.25 Analog comparators
Two analog comparators are provided on the P89LPC970/971/972. Input and output
options allow use of the comparators in a number of different configurations. Comparator
operation is such that the output is a logical one (which may be read in a register and/or
routed to a pin) when the positive input (one of two selectable pins) is greater than the
negative input (selectable from a pin or an internal reference voltage). Otherwise the
output is a zero. Each comparator may be configured to cause an interrupt when the
output value changes.
The overall connections to both comparators are shown in Figure 14. The comparators
function to VDD = 2.4 V.
When each comparator is first enabled, the comparator output and interrupt flag are not
guaranteed to be stable for 10 μs. The corresponding comparator interrupt should not be
enabled during that time, and the comparator interrupt flag must be cleared before the
interrupt is enabled in order to prevent an immediate interrupt service.
When a comparator is disabled the comparator’s output, COn, goes HIGH. If the
comparator output was LOW and then is disabled, the resulting transition of the
comparator output from a LOW to HIGH state will set the comparator flag, CMFn. This will
cause an interrupt if the comparator interrupt is enabled. The user should therefore
disable the comparator interrupt prior to disabling the comparator. Additionally, the user
should clear the comparator flag, CMFn, after disabling the comparator.
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CP1
OE1
comparator 1
(P0.4) CIN1A
(P0.3) CIN1B
CO1
CMP1 (P0.6)
(P0.5) CMPREF
change detect
Vref(cmp)(1)
CMF1
CN1
interrupt
change detect
EC
CP2
CMF2
comparator 2
(P0.2) CIN2A
(P0.1) CIN2B
CMP2 (P0.0)
CO2
OE2
CN2
002aac346
(1) See Section 7.25.1 for more details.
Fig 14. Comparator input and output connections
7.25.1 Selectable internal reference voltage
An internal reference voltage generator may be used to supply a default reference when a
single comparator input pin is used. The user may program one of eight different values
for the internal reference voltage using the Comparator Reference register (CMPREF).
Each of the two comparators may use a different reference voltage.
7.25.2 Comparator interrupt
Each comparator has an interrupt flag contained in its configuration register. This flag is
set whenever the comparator output changes state. The flag may be polled by software or
may be used to generate an interrupt. The two comparators use one common interrupt
vector. If both comparators enable interrupts, after entering the interrupt service routine,
the user needs to read the flags to determine which comparator caused the interrupt.
7.25.3 Comparators and power reduction modes
Either or both comparators may remain enabled when Power-down or Idle mode is
activated, but both comparators are disabled automatically in Total Power-down mode.
If a comparator interrupt is enabled (except in Total Power-down mode), a change of the
comparator output state will generate an interrupt and wake-up the processor. If the
comparator output to a pin is enabled, the pin should be configured in the push-pull mode
in order to obtain fast switching times while in Power-down mode. The reason is that with
the oscillator stopped, the temporary strong pull-up that normally occurs during switching
on a quasi-bidirectional port pin does not take place.
Comparators consume power in Power-down and Idle modes, as well as in the normal
operating mode. This fact should be taken into account when system power consumption
is an issue. To minimize power consumption, the user can disable the comparators via
PCONA.5, or put the device in Total Power-down mode.
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7.26 KBI
The Keypad Interrupt function (KBI) is intended primarily to allow a single interrupt to be
generated when Port 0 is equal to or not equal to a certain pattern. This function can be
used for bus address recognition or keypad recognition. The port can be configured via
SFRs for different tasks.
The Keypad Interrupt Mask Register (KBMASK) is used to define which input pins
connected to Port 0 can trigger the interrupt. The Keypad Pattern Register (KBPATN) is
used to define a pattern that is compared to the value of Port 0. The Keypad Interrupt Flag
(KBIF) in the Keypad Interrupt Control Register (KBCON) is set when the condition is
matched while the Keypad Interrupt function is active. An interrupt will be generated if
enabled. The PATN_SEL bit in the Keypad Interrupt Control Register (KBCON) is used to
define equal or not-equal for the comparison.
In order to use the Keypad Interrupt as an original KBI function like in P87LPC76x series,
the user needs to set KBPATN = 0FFH and PATN_SEL = 1 (not equal), then any key
connected to Port 0 which is enabled by the KBMASK register will cause the hardware to
set KBIF and generate an interrupt if it has been enabled. The interrupt may be used to
wake-up the CPU from Idle or Power-down modes. This feature is particularly useful in
handheld, battery-powered systems that need to carefully manage power consumption
yet also need to be convenient to use.
In order to set the flag and cause an interrupt, the pattern on Port 0 must be held longer
than six CCLKs.
7.27 Watchdog timer
The watchdog timer causes a system reset when it underflows as a result of a failure to
feed the timer prior to the timer reaching its terminal count. It consists of a programmable
12-bit prescaler, and an 8-bit down counter. The down counter is decremented by a tap
taken from the prescaler. The clock source for the prescaler can be the PCLK, the nominal
400 kHz/25 kHz watchdog oscillator or low speed crystal oscillator. The watchdog timer
can only be reset by a power-on reset. When the watchdog feature is disabled, it can be
used as an interval timer and may generate an interrupt. Figure 15 shows the watchdog
timer in Watchdog mode. Feeding the watchdog requires a two-byte sequence. If PCLK is
selected as the watchdog clock and the CPU is powered down, the watchdog is disabled.
The watchdog timer has a time-out period that ranges from a few μs to a few seconds.
Please refer to the P89LPC970/971/972 User manual for more details.
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8-bit microcontroller with accelerated two-clock 80C51 core
WDL (C1H)
MOV WFEED1, #0A5H
MOV WFEED2, #05AH
400 kHz
oscillator
25 kHz
oscillator
PCLK
0
1
0
0
1
watchdog
oscillator
crystal
oscillator
÷32
1
8-BIT DOWN
COUNTER
PRESCALER
XTALWD
(CLKCON.4)
reset(1)
SHADOW REGISTER
WDMOD
(CLKCON.5)
PRE2
WDCON (A7H)
PRE1
PRE0
-
-
WDRUN
WDTOF
WDCLK
002aae542
(1) Watchdog reset can also be caused by an invalid feed sequence, or by writing to WDCON not immediately followed by a feed
sequence.
Fig 15. Watchdog timer in Watchdog mode (WDTE = 1)
7.28 Additional features
7.28.1 Software reset
The SRST bit in AUXR1 gives software the opportunity to reset the processor completely,
as if an external reset or watchdog reset had occurred. Care should be taken when writing
to AUXR1 to avoid accidental software resets.
7.28.2 Dual data pointers
The dual Data Pointers (DPTR) provides two different Data Pointers to specify the
address used with certain instructions. The DPS bit in the AUXR1 register selects one of
the two Data Pointers. Bit 2 of AUXR1 is permanently wired as a logic 0 so that the DPS
bit may be toggled (thereby switching Data Pointers) simply by incrementing the AUXR1
register, without the possibility of inadvertently altering other bits in the register.
7.29 Flash program memory
7.29.1 General description
The P89LPC970/971/972 flash memory provides in-circuit electrical erasure and
programming. The flash can be erased, read, and written as bytes. The Sector and Page
Erase functions can erase any flash sector (1 kB) or page (64 bytes). The Chip Erase
operation will erase the entire program memory. ICP using standard commercial
programmers is available. In addition, IAP and byte-erase allows code memory to be used
for non-volatile data storage. On-chip erase and write timing generation contribute to a
user-friendly programming interface. The P89LPC970/971/972 flash reliably stores
memory contents even after 100000 erase and program cycles. The cell is designed to
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optimize the erase and programming mechanisms. The P89LPC970/971/972 uses VDD as
the supply voltage to perform the Program/Erase algorithms. When voltage supply is
lower than 2.4 V, the BOD flash is tripped and flash erase/program is blocked.
7.29.2 Features
•
•
•
•
•
Programming and erase over the full operating voltage range.
Byte erase allows code memory to be used for data storage.
Read/Programming/Erase using ISP/IAP/ICP.
Internal fixed boot ROM, containing low-level IAP routines available to user code.
Default loader providing ISP via the serial port, located in upper end of user program
memory.
• Boot vector allows user-provided flash loader code to reside anywhere in the flash
memory space, providing flexibility to the user.
•
•
•
•
•
Any flash program/erase operation in 2 ms.
Programming with industry-standard commercial programmers.
Programmable security for the code in the flash for each sector.
100000 typical erase/program cycles for each byte.
10 year minimum data retention.
7.29.3 Flash organization
The program memory consists of two/four/eight 1 kB sectors on the P89LPC970/971/972
device. Each sector can be further divided into 64-byte pages. In addition to sector erase,
page erase, and byte erase, a 64-byte page register is included which allows from 1 byte
to 64 bytes of a given page to be programmed at the same time, substantially reducing
overall programming time.
7.29.4 Using flash as data storage
The flash code memory array of this device supports individual byte erasing and
programming. Any byte in the code memory array may be read using the MOVC
instruction, provided that the sector containing the byte has not been secured (a MOVC
instruction is not allowed to read code memory contents of a secured sector). Thus any
byte in a non-secured sector may be used for non-volatile data storage.
7.29.5 Flash programming and erasing
Four different methods of erasing or programming of the flash are available. The flash
may be programmed or erased in the end-user application (IAP) under control of the
application’s firmware. Another option is to use the ICP mechanism. This ICP system
provides for programming through a serial clock/serial data interface. As shipped from the
factory, the upper 512 bytes of user code space contains a serial ISP routine allowing for
the device to be programmed in circuit through the serial port. The flash may also be
programmed or erased using a commercially available EPROM programmer which
supports this device. This device does not provide for direct verification of code memory
contents. Instead, this device provides a 32-bit CRC result on either a sector or the entire
user code space.
Remark: When voltage supply is lower than 2.4 V, the BOD flash is tripped and flash
erase/program is blocked.
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7.29.6 ICP
ICP is performed without removing the microcontroller from the system. The ICP facility
consists of internal hardware resources to facilitate remote programming of the
P89LPC970/971/972 through a two-wire serial interface. The NXP ICP facility has made
in-circuit programming in an embedded application - using commercially available
programmers - possible with a minimum of additional expense in components and circuit
board area. The ICP function uses five pins. Only a small connector needs to be available
to interface your application to a commercial programmer in order to use this feature.
Additional details may be found in the P89LPC970/971/972 User manual.
7.29.7 IAP
IAP is performed in the application under the control of the microcontroller’s firmware. The
IAP facility consists of internal hardware resources to facilitate programming and erasing.
The NXP IAP has made in-application programming in an embedded application possible
without additional components. Two methods are available to accomplish IAP. A set of
predefined IAP functions are provided in a Boot ROM and can be called through a
common interface, PGM_MTP. Several IAP calls are available for use by an application
program to permit selective erasing and programming of flash sectors, pages, security
bits, configuration bytes, and device ID. These functions are selected by setting up the
microcontroller’s registers before making a call to PGM_MTP at FF03H. The Boot ROM
occupies the program memory space at the top of the address space from FF00H to
FEFFH, thereby not conflicting with the user program memory space.
In addition, IAP operations can be accomplished through the use of four SFRs consisting
of a control/status register, a data register, and two address registers. Additional details
may be found in the P89LPC970/971/972 User manual.
7.29.8 ISP
ISP is performed without removing the microcontroller from the system. The ISP facility
consists of a series of internal hardware resources coupled with internal firmware to
facilitate remote programming of the P89LPC970/971/972 through the serial port. This
firmware is provided by NXP and embedded within each P89LPC970/971/972 device.
The NXP ISP facility has made in-system programming in an embedded application
possible with a minimum of additional expense in components and circuit board area. The
ISP function uses five pins (VDD, VSS, TXD, RXD, and RST). Only a small connector
needs to be available to interface your application to an external circuit in order to use this
feature.
7.29.9 Power-on reset code execution
The P89LPC970/971/972 contains two special flash elements: the Boot Vector and the
Boot Status bit. Following reset, the P89LPC970/971/972 examines the contents of the
Boot Status bit. If the Boot Status bit is set to zero, power-up execution starts at location
0000H, which is the normal start address of the user’s application code. When the Boot
Status bit is set to a value other than zero, the contents of the Boot Vector are used as the
high byte of the execution address and the low byte is set to 00H.
Table 9 shows the factory default Boot Vector setting for these devices. A factory-provided
bootloader is pre-programmed into the address space indicated and uses the indicated
bootloader entry point to perform ISP functions. This code can be erased by the user.
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Remark: Users who wish to use this loader should take precautions to avoid erasing the
1 kB sector that contains this bootloader. Instead, the page erase function can be used to
erase the first eight 64-byte pages located in this sector.
A custom bootloader can be written with the Boot Vector set to the custom bootloader, if
desired.
Table 9.
Default boot vector values and ISP entry points
Device
Default
boot vector
Default
bootloader
entry point
Default bootloader
code range
1 kB sector
range
P89LPC970
07H
0700H
0600H to 07FFH
0400H to 07FFH
P89LPC971
0FH
0F00H
0E00H to 1FFFH
0C00H to 0FFFH
P89LPC972
1FH
1F00H
1E00H to 1FFFH
1C00H to 1FFFH
7.29.10 Hardware activation of the bootloader
The bootloader can also be executed by forcing the device into ISP mode during a
power-on sequence (see the P89LPC970/971/972 User manual for specific information).
This has the same effect as having a non-zero status byte. This allows an application to
be built that will normally execute user code but can be manually forced into ISP
operation. If the factory default setting for the boot is changed, it will no longer point to the
factory pre-programmed ISP bootloader code. After programming the flash, the status
byte should be programmed to zero in order to allow execution of the user’s application
code beginning at address 0000H.
7.30 User configuration bytes
Some user-configurable features of the P89LPC970/971/972 must be defined at power-up
and therefore cannot be set by the program after start of execution. These features are
configured through the use of the flash byte UCFG1 and UCFG2. Please see the
P89LPC970/971/972 User Manual for additional details.
7.31 User sector security bytes
There are four/eight User Sector Security Bytes on the P89LPC970/971/972. Each byte
corresponds to one sector. Please see the P89LPC970/971/972 User manual for
additional details.
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8. Limiting values
Table 10. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).[1]
Symbol
Parameter
Tamb(bias)
Conditions
Min
Max
Unit
bias ambient temperature
−55
+125
°C
Tstg
storage temperature
−65
+150
°C
IOH(I/O)
HIGH-level output current per
input/output pin
-
20
mA
IOL(I/O)
LOW-level output current per
input/output pin
-
20
mA
II/Otot(max)
maximum total input/output current
-
100
mA
Vxtal
crystal voltage
on XTAL1, XTAL2 pins when
XTAL1/XTAL2 is used as
crystal input/output; with
respect to VSS
−0.5
+4.0
V
on XTAL1, XTAL2 pins when
XTAL1/XTAL2 is used as
GPIO; with respect to VSS
−0.5
+5.5
V
Vn
voltage on any other pin
with respect to VSS
-
5.5
V
Ptot(pack)
total power dissipation (per package)
based on package heat
transfer, not device power
consumption
-
1.5
W
VESD
electrostatic discharge voltage
human body model; all pins
−3000
+3000
V
−700
+700
V
charged device model; all
pins
[1]
[2]
The following applies to Table 10:
a) This product includes circuitry specifically designed for the protection of its internal devices from the damaging effects of excessive
static charge. Nonetheless, it is suggested that conventional precautions be taken to avoid applying greater than the rated
maximum.
b) Parameters are valid over ambient temperature range unless otherwise specified. All voltages are with respect to VSS unless
otherwise noted.
[2]
Human body model: equivalent to discharging a 100 pF capacitor through a 1.5 kΩ series resistor.
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system frequency
(MHz)
18
12
2.4
2.7
3.0
3.3
3.6
5.5
VDD (V)
002aaf005
Fig 16. Frequency vs. supply voltage
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9. Static characteristics
Table 11. Static characteristics
VDD = 2.4 V to 5.5 V unless otherwise specified.
Tamb = −40 °C to +85 °C for industrial applications, unless otherwise specified.
Symbol
Parameter
Conditions
IDD(oper)
operating supply
current
VDD = 2.4 V
Min
Typ[1]
Max
Unit
fosc = 12 MHz, High-speed mode of
regulators
[2]
-
6
7
mA
fosc = 12 MHz, Low current mode of
regulators
[2]
-
5
6
mA
fosc = 12 MHz, High-speed mode of
regulators
[2]
-
9
10
mA
fosc = 12 MHz, Low current mode of
regulators
[2]
-
7
8
mA
fosc = 12 MHz, High-speed mode of
regulators
[2]
-
10
11
mA
fosc = 12 MHz, Low current mode of
regulators
[2]
-
8
9
mA
fosc = 18 MHz, High-speed mode of
regulators
[2]
-
11
12
mA
fosc = 12 MHz, High-speed mode of
regulators
[2]
-
3.5
4.5
mA
fosc = 12 MHz, Low current mode of
regulators
[2]
-
3
4
mA
fosc = 12 MHz, High-speed mode of
regulators
[2]
-
5
6
mA
fosc = 12 MHz, Low current mode of
regulators
[2]
-
4
5
mA
fosc = 12 MHz, High-speed mode of
regulators
[2]
-
6
7
mA
fosc = 12 MHz, Low current mode of
regulators
[2]
-
4
5
mA
fosc = 18 MHz, High-speed mode of
regulators
[2]
-
6.5
7.5
mA
Power-down mode VDD = 2.4 V; voltage comparators
supply current
powered down
[3]
-
28
35
μA
VDD = 3.3 V; voltage comparators
powered down
[3]
-
32
40
μA
VDD = 5.5 V; voltage comparators
powered down
[3]
-
38
45
μA
VDD = 3.3 V
VDD = 5.5 V
IDD(idle)
Idle mode supply
current
VDD = 2.4 V
VDD = 3.3 V
VDD = 5.5 V
IDD(pd)
P89LPC97X
Product data sheet
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Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
47 of 66
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
Table 11. Static characteristics …continued
VDD = 2.4 V to 5.5 V unless otherwise specified.
Tamb = −40 °C to +85 °C for industrial applications, unless otherwise specified.
Symbol
IDD(tpd)
Parameter
total Power-down
mode supply
current
Min
Typ[1]
Max
Unit
VDD = 2.4 V
[3]
-
1
5
μA
VDD = 3.3 V
[3]
-
1
5
μA
VDD = 5.5 V
[3]
-
1
5
μA
Conditions
(dV/dt)r
rise rate
of VDD; to ensure power-on reset signal
5
-
5000
V/S
(dV/dt)f
fall rate
of VDD
-
-
50
mV/μs
VPOR
power-on reset
voltage
-
-
0.5
V
VDDR
data retention
supply voltage
1.5
-
-
V
Vth(HL)
HIGH-LOW
threshold voltage
except SCL, SDA
0.22VDD
0.4VDD
-
V
VIL
LOW-level input
voltage
SCL, SDA only
−0.5
-
0.4VDD
V
Vth(LH)
LOW-HIGH
threshold voltage
except SCL, SDA
-
0.6VDD
0.7VDD
V
VIH
HIGH-level input
voltage
SCL, SDA only
0.55VDD
-
5.5
V
Vhys
hysteresis voltage
port 1
-
0.2VDD
-
V
VOL
LOW-level output
voltage
IOL = 20 mA; VDD = 2.4 V to 5.5 V
all ports, all modes except high-Z
[4]
-
0.6
1.0
V
IOL = 3.2 mA; VDD = 2.4 V to 5.5 V
all ports, all modes except high-Z
[4]
-
0.2
0.3
V
IOH = −20 μA; VDD = 2.4 V to 5.5 V;
all ports, quasi-bidirectional mode
VDD − 0.3
VDD − 0.2
-
V
IOH = −3.2 mA; VDD = 2.4 V to 5.5 V;
all ports, push-pull mode
VDD − 0.7
VDD − 0.4
-
V
IOH = −10 mA; VDD = 2.4 V to 5.5 V; all
ports, push-pull mode
-
VDD − 0.5
-
V
on XTAL1, XTAL2 pins when
XTAL1/XTAL2 is used as crystal
input/output; with respect to VSS
−0.5
-
+4.0
V
on XTAL1, XTAL2 pins when
XTAL1/XTAL2 is used as GPIO; with
respect to VSS
−0.5
-
+5.5
V
[5]
−0.5
-
+5.5
V
VOH
Vxtal
HIGH-level output
voltage
crystal voltage
Vn
voltage on any
other pin
Ciss
input capacitance
[6]
-
-
15
pF
IIL
LOW-level input
current
VI = 0.4 V
[7]
-
-
−80
μA
ILI
input leakage
current
VI = VIL, VIH, or Vth(HL)
[8]
-
-
±1
μA
ITHL
HIGH-LOW
transition current
all ports; VI = 1.5 V at VDD = 5.5 V
[9]
−30
-
−450
μA
P89LPC97X
Product data sheet
with respect to VSS
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
48 of 66
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
Table 11. Static characteristics …continued
VDD = 2.4 V to 5.5 V unless otherwise specified.
Tamb = −40 °C to +85 °C for industrial applications, unless otherwise specified.
Symbol
Parameter
RRST_N(int) internal pull-up
resistance on pin
RST
Conditions
Min
Typ[1]
Max
Unit
pin RST
30
-
120
kΩ
BOD interrupt
Vtrip
trip voltage
falling stage
BOICFG2, BOICFG1, BOICFG0 = 010
2.45
-
2.65
V
BOICFG2, BOICFG1, BOICFG0 = 011
2.75
-
2.95
V
BOICFG2, BOICFG1, BOICFG0 = 100
2.90
-
3.10
V
BOICFG2, BOICFG1, BOICFG0 = 101
3.35
-
3.55
V
BOICFG2, BOICFG1, BOICFG0 = 110
4.10
-
4.30
V
BOICFG2, BOICFG1, BOICFG0 = 111
4.25
-
4.45
V
BOICFG2, BOICFG1, BOICFG0 = 010
2.60
-
2.80
V
BOICFG2, BOICFG1, BOICFG0 = 011
2.90
-
3.10
V
BOICFG2, BOICFG1, BOICFG0 = 100
3.05
-
3.25
V
BOICFG2, BOICFG1, BOICFG0 = 101
3.50
-
3.70
V
BOICFG2, BOICFG1, BOICFG0 = 110
4.15
-
4.35
V
BOICFG2, BOICFG1, BOICFG0 = 111
4.35
-
4.55
V
rising stage
P89LPC97X
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
49 of 66
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
Table 11. Static characteristics …continued
VDD = 2.4 V to 5.5 V unless otherwise specified.
Tamb = −40 °C to +85 °C for industrial applications, unless otherwise specified.
Symbol
Min
Typ[1]
Max
Unit
BOE2, BOE1, BOE0 = 010
2.15
-
2.35
V
BOE2, BOE1, BOE0 = 011
2.45
-
2.65
V
BOE2, BOE1, BOE0 = 100
2.75
-
2.95
V
Parameter
Conditions
trip voltage
falling stage
BOD reset
Vtrip
BOE2, BOE1, BOE0 = 101
3.05
-
3.25
V
BOE2, BOE1, BOE0 = 110
3.75
-
3.95
V
BOE2, BOE1, BOE0 = 111
3.95
-
4.15
V
rising stage
BOE2, BOE1, BOE0 = 010
2.30
-
2.50
V
BOE2, BOE1, BOE0 = 011
2.60
-
2.80
V
BOE2, BOE1, BOE0 = 100
2.90
-
3.10
V
BOE2, BOE1, BOE0 = 101
3.20
-
3.40
V
BOE2, BOE1, BOE0 = 110
3.85
-
4.05
V
BOE2, BOE1, BOE0 = 111
4.05
-
4.25
V
2.30
-
2.55
V
BOD flash
Vtrip
trip voltage
falling stage
2.40
-
2.65
V
Vref(bg)
band gap
reference voltage
1.19
1.23
1.27
V
TCbg
band gap
temperature
coefficient
-
10
20
ppm/
°C
rising stage
[1]
Typical ratings are not guaranteed. The values listed are at room temperature, 3 V.
[2]
The IDD(oper) and IDD(idle) specifications are measured using an external clock with the following functions disabled: comparators,
real-time clock, and watchdog timer.
[3]
The IDD(pd) and IDD(tpd) specification is measured using an external clock with the following functions disabled: comparators, real-time
clock, brownout detect, and watchdog timer.
[4]
See Section 8 “Limiting values” for steady state (non-transient) limits on IOL or IOH. If IOL/IOH exceeds the test condition, VOL/VOH may
exceed the related specification.
[5]
This specification can be applied to pins which have A/D input or analog comparator input functions when the pin is not being used for
those analog functions. When the pin is being used as an analog input pin, the maximum voltage on the pin must be limited to 4.0 V with
respect to VSS.
[6]
Pin capacitance is characterized but not tested.
[7]
Measured with port in quasi-bidirectional mode.
[8]
Measured with port in high-impedance mode.
[9]
Port pins source a transition current when used in quasi-bidirectional mode and externally driven from logic 1 to logic 0. This current is
highest when VI is approximately 2 V.
P89LPC97X
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
50 of 66
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
10. Dynamic characteristics
Table 12. Dynamic characteristics (12 MHz)
VDD = 2.4 V to 5.5 V unless otherwise specified.
Tamb = −40 °C to +85 °C for industrial applications, unless otherwise specified.[1][2]
Symbol
Parameter
Conditions
Variable clock
fosc = 12 MHz
Unit
Min
Max
Min
fosc(RC)
internal RC oscillator
frequency
nominal f = 7.3728 MHz
trimmed to ±1 % at
Tamb = 25 °C; clock
doubler option = OFF
(default)
7.189
7.557
7.189
nominal f = 14.7456 MHz;
clock doubler option = ON,
VDD = 2.7 V to 5.5 V
14.378
15.114
14.378 15.114 MHz
Max
7.557 MHz
fosc(WD)
internal watchdog
oscillator frequency
360
440
360
440
kHz
fosc
oscillator frequency
0
12
-
-
MHz
Tcy(clk)
clock cycle time
83
-
-
-
ns
fCLKLP
low-power select clock
frequency
0
8
-
-
MHz
P1.5/RST pin
-
50
-
50
ns
any pin except P1.5/RST
-
15
-
15
ns
P1.5/RST pin
125
-
125
-
ns
any pin except P1.5/RST
50
-
50
-
ns
see Figure 17
Glitch filter
tgr
tsa
glitch rejection time
signal acceptance time
External clock
tCHCX
clock HIGH time
see Figure 17
33
Tcy(clk) − tCLCX
33
-
ns
tCLCX
clock LOW time
see Figure 17
33
Tcy(clk) − tCHCX
33
-
ns
tCLCH
clock rise time
see Figure 17
-
8
-
8
ns
tCHCL
clock fall time
see Figure 17
-
8
-
8
ns
Shift register (UART mode 0)
TXLXL
serial port clock cycle
time
see Figure 18
16Tcy(clk)
-
1333
-
ns
tQVXH
output data set-up to
clock rising edge time
see Figure 18
13Tcy(clk)
-
1083
-
ns
tXHQX
output data hold after
clock rising edge time
see Figure 18
-
Tcy(clk) + 20
-
103
ns
tXHDX
input data hold after
clock rising edge time
see Figure 18
-
0
-
0
ns
tXHDV
input data valid to clock
rising edge time
see Figure 18
150
-
150
-
ns
0
CCLK⁄
6
0
2.0
MHz
-
CCLK⁄
4
-
3.0
MHz
SPI interface
fSPI
SPI operating frequency
slave
master
P89LPC97X
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
51 of 66
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
Table 12. Dynamic characteristics (12 MHz) …continued
VDD = 2.4 V to 5.5 V unless otherwise specified.
Tamb = −40 °C to +85 °C for industrial applications, unless otherwise specified.[1][2]
Symbol
TSPICYC
Parameter
Conditions
Variable clock
Max
Min
Max
slave
6⁄
CCLK
-
500
-
ns
master
4⁄
CCLK
-
333
-
ns
250
-
250
-
ns
250
-
250
-
ns
master
2⁄
CCLK
-
165
-
ns
slave
3⁄
CCLK
-
250
-
ns
master
2⁄
CCLK
-
165
-
ns
slave
3⁄
CCLK
-
250
-
ns
100
-
100
-
ns
100
-
100
-
ns
0
120
0
120
ns
0
240
-
240
ns
-
240
-
240
ns
SPI cycle time
SPI enable lead time
tSPILAG
SPI enable lag time
see Figure 19, 20, 21, 22
see Figure 21, 22
slave
see Figure 21, 22
slave
tSPICLKL
tSPIDSU
SPICLK HIGH time
SPICLK LOW time
SPI data set-up time
see Figure 19, 20, 21, 22
see Figure 19, 20, 21, 22
see Figure 19, 20, 21, 22
master or slave
tSPIDH
SPI data hold time
tSPIA
SPI access time
see Figure 19, 20, 21, 22
master or slave
see Figure 21, 22
slave
tSPIDIS
SPI disable time
tSPIDV
SPI enable to output
data valid time
see Figure 21, 22
slave
see Figure 19, 20, 21, 22
slave
master
-
167
-
167
ns
0
-
0
-
ns
SPI outputs (SPICLK,
MOSI, MISO)
-
100
-
100
ns
SPI inputs (SPICLK,
MOSI, MISO, SS)
-
2000
-
2000
ns
SPI outputs (SPICLK,
MOSI, MISO)
-
100
-
100
ns
SPI inputs (SPICLK,
MOSI, MISO, SS)
-
2000
-
2000
ns
tSPIOH
SPI output data hold
time
see Figure 19, 20, 21, 22
tSPIR
SPI rise time
see Figure 19, 20, 21, 22
tSPIF
Unit
Min
tSPILEAD
tSPICLKH
fosc = 12 MHz
SPI fall time
see Figure 19, 20, 21, 22
[1]
Parameters are valid over operating temperature range unless otherwise specified.
[2]
Parts are tested to 2 MHz, but are guaranteed to operate down to 0 Hz.
P89LPC97X
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
52 of 66
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
Table 13. Dynamic characteristics (18 MHz)
VDD = 3.6 V to 5.5 V unless otherwise specified.
Tamb = −40 °C to +85 °C for industrial applications, unless otherwise specified.[1][2]
Symbol Parameter
fosc(RC)
internal RC oscillator
frequency
Conditions
Variable clock
fosc = 18 MHz
Unit
Min
Max
Min
Max
nominal f = 7.3728 MHz
trimmed to ±1 % at
Tamb = 25 °C; clock
doubler option = OFF
(default)
7.189
7.557
7.189
nominal f = 14.7456 MHz;
clock doubler option = ON
14.378
15.114
14.378 15.114 MHz
7.557 MHz
fosc(WD)
internal watchdog
oscillator frequency
360
440
360
440
kHz
fosc
oscillator frequency
0
18
-
-
MHz
Tcy(clk)
clock cycle time
fCLKLP
low-power select clock
frequency
see Figure 17
55
-
-
-
ns
0
8
-
-
MHz
Glitch filter
tgr
tsa
glitch rejection time
signal acceptance time
P1.5/RST pin
-
50
-
50
ns
any pin except P1.5/RST
-
15
-
15
ns
P1.5/RST pin
125
-
125
-
ns
any pin except P1.5/RST
50
-
50
-
ns
External clock
tCHCX
clock HIGH time
see Figure 17
22
Tcy(clk) − tCLCX
22
-
ns
tCLCX
clock LOW time
see Figure 17
22
Tcy(clk) − tCHCX
22
-
ns
tCLCH
clock rise time
see Figure 17
-
5
-
5
ns
tCHCL
clock fall time
see Figure 17
-
5
-
5
ns
Shift register (UART mode 0)
TXLXL
serial port clock cycle
time
see Figure 18
16Tcy(clk)
-
888
-
ns
tQVXH
output data set-up to
clock rising edge time
see Figure 18
13Tcy(clk)
-
722
-
ns
tXHQX
output data hold after
clock rising edge time
see Figure 18
-
Tcy(clk) + 20
-
75
ns
tXHDX
input data hold after
clock rising edge time
see Figure 18
-
0
-
0
ns
tXHDV
input data valid to clock
rising edge time
see Figure 18
150
-
150
-
ns
0
CCLK⁄
6
0
3.0
MHz
-
CCLK⁄
4
-
4.5
MHz
slave
6⁄
CCLK
-
333
-
ns
master
4⁄
CCLK
-
222
-
ns
SPI interface
fSPI
SPI operating frequency
slave
master
TSPICYC
SPI cycle time
P89LPC97X
Product data sheet
see Figure 19, 20, 21, 22
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
53 of 66
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
Table 13. Dynamic characteristics (18 MHz) …continued
VDD = 3.6 V to 5.5 V unless otherwise specified.
Tamb = −40 °C to +85 °C for industrial applications, unless otherwise specified.[1][2]
Symbol Parameter
tSPILEAD
Conditions
Variable clock
Max
Min
Max
250
-
250
-
ns
250
-
250
-
ns
slave
3⁄
CCLK
-
167
-
ns
master
2⁄
CCLK
-
111
-
ns
slave
3⁄
CCLK
-
167
-
ns
master
2⁄
CCLK
-
111
-
ns
100
-
100
-
ns
100
-
100
-
ns
0
80
0
80
ns
0
160
-
160
ns
slave
-
160
-
160
ns
master
-
111
-
111
ns
0
-
0
-
ns
SPI outputs (SPICLK,
MOSI, MISO)
-
100
-
100
ns
SPI inputs (SPICLK,
MOSI, MISO, SS)
-
2000
-
2000
ns
SPI outputs (SPICLK,
MOSI, MISO)
-
100
-
100
ns
SPI inputs (SPICLK,
MOSI, MISO, SS)
-
2000
-
2000
ns
SPI enable lead time
see Figure 21, 22
SPI enable lag time
see Figure 21, 22
slave
tSPICLKH
tSPICLKL
tSPIDSU
SPICLK HIGH time
SPICLK LOW time
SPI data set-up time
see Figure 19, 20, 21, 22
see Figure 19, 20, 21, 22
see Figure 19, 20, 21, 22
master or slave
tSPIDH
SPI data hold time
see Figure 19, 20, 21, 22
master or slave
tSPIA
SPI access time
see Figure 21, 22
slave
tSPIDIS
SPI disable time
see Figure 21, 22
slave
tSPIDV
SPI enable to output
data valid time
see Figure 19, 20, 21, 22
tSPIOH
SPI output data hold
time
see Figure 19, 20, 21, 22
tSPIR
SPI rise time
see Figure 19, 20, 21, 22
tSPIF
Unit
Min
slave
tSPILAG
fosc = 18 MHz
SPI fall time
see Figure 19, 20, 21, 22
[1]
Parameters are valid over operating temperature range unless otherwise specified.
[2]
Parts are tested to 2 MHz, but are guaranteed to operate down to 0 Hz.
P89LPC97X
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
54 of 66
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
10.1 Waveforms
tCHCL
tCHCX
tCLCH
tCLCX
Tcy(clk)
002aaa907
Fig 17. External clock timing (with an amplitude of at least Vi(RMS) = 200 mV)
TXLXL
clock
tXHQX
tQVXH
output data
0
write to SBUF
input data
1
2
3
4
5
6
tXHDX
set TI
tXHDV
valid
7
valid
valid
valid
valid
valid
valid
valid
clear RI
set RI
002aaa906
Fig 18. Shift register mode timing
SS
TSPICYC
tSPIF
tSPICLKH
tSPICLKL
tSPIR
SPICLK
(CPOL = 0)
(output)
tSPIF
tSPICLKL
tSPIR
tSPICLKH
SPICLK
(CPOL = 1)
(output)
tSPIDSU
MISO
(input)
tSPIDH
tSPIDV
MOSI
(output)
LSB/MSB in
MSB/LSB in
tSPIOH
tSPIDV
tSPIR
tSPIF
master MSB/LSB out
master LSB/MSB out
002aaa908
Fig 19. SPI master timing (CPHA = 0)
P89LPC97X
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
55 of 66
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
SS
TSPICYC
tSPIF
tSPICLKL
tSPIR
tSPICLKH
SPICLK
(CPOL = 0)
(output)
tSPIF
tSPICLKL
tSPICLKH
SPICLK
(CPOL = 1)
(output)
tSPIDSU
MISO
(input)
tSPIDH
LSB/MSB in
MSB/LSB in
tSPIDV
MOSI
(output)
tSPIR
tSPIOH
tSPIDV
tSPIF
tSPIR
master MSB/LSB out
master LSB/MSB out
002aaa909
Fig 20. SPI master timing (CPHA = 1)
SS
tSPIF
tSPIR
TSPICYC
tSPILEAD
tSPIF
tSPICLKH
tSPICLKL
tSPIR
tSPILAG
SPICLK
(CPOL = 0)
(input)
tSPIF
tSPICLKL
tSPIR
tSPICLKH
SPICLK
(CPOL = 1)
(input)
tSPIOH
tSPIA
tSPIOH
MISO
(output)
slave MSB/LSB out
tSPIDSU
MOSI
(input)
tSPIDH
tSPIOH
tSPIDIS
tSPIDV
tSPIDV
slave LSB/MSB out
tSPIDSU
MSB/LSB in
tSPIDSU
not defined
tSPIDH
LSB/MSB in
002aaa910
Fig 21. SPI slave timing (CPHA = 0)
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NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
SS
tSPIF
tSPILEAD
tSPIR
TSPICYC
tSPIF
tSPIR
tSPICLKL
tSPILAG
tSPICLKH
SPICLK
(CPOL = 0)
(input)
tSPIF
tSPICLKL
SPICLK
(CPOL = 1)
(input)
tSPIR
tSPICLKH
tSPIOH
tSPIOH
tSPIOH
tSPIDV
tSPIDV
tSPIDV
tSPIDIS
tSPIA
MISO
(output)
slave LSB/MSB out
slave MSB/LSB out
not defined
tSPIDSU
MOSI
(input)
tSPIDH
tSPIDSU
MSB/LSB in
tSPIDH
LSB/MSB in
002aaa911
Fig 22. SPI slave timing (CPHA = 1)
10.2 ISP entry mode
Table 14. Dynamic characteristics, ISP entry mode
VDD = 2.4 V to 5.5 V, unless otherwise specified.
Tamb = −40 °C to +85 °C for industrial applications, unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
tVR
VDD active to RST active delay
time
pin P1.5/RST
50
-
-
μs
tRH
RST HIGH time
pin P1.5/RST
1
-
32
μs
tRL
RST LOW time
pin P1.5/RST
1
-
-
μs
VDD
tVR
tRH
RST
tRL
002aaa912
Fig 23. ISP entry waveform
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Product data sheet
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8-bit microcontroller with accelerated two-clock 80C51 core
11. Other characteristics
11.1 Comparator electrical characteristics
Table 15. Comparator electrical characteristics
VDD = 2.4 V to 5.5 V, unless otherwise specified.
Tamb = −40 °C to +85 °C for industrial applications, unless otherwise specified.
Symbol
Parameter
VIO
input offset voltage
VIC
common-mode input voltage
CMRR
common-mode rejection ratio
Conditions
[1]
Min
Typ
Max
Unit
-
-
±10
mV
0
-
VDD − 0.3
V
-
-
−50
dB
tres(tot)
total response time
-
250
500
ns
t(CE-OV)
chip enable to output valid time
-
-
10
μs
ILI
input leakage current
-
-
±1
μA
[1]
0 V < VI < VDD
This parameter is characterized, but not tested in production.
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8-bit microcontroller with accelerated two-clock 80C51 core
12. Package outline
TSSOP20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm
SOT360-1
E
D
A
X
c
HE
y
v M A
Z
11
20
Q
A2
(A 3)
A1
pin 1 index
A
θ
Lp
L
1
10
e
detail X
w M
bp
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (2)
e
HE
L
Lp
Q
v
w
y
Z (1)
θ
mm
1.1
0.15
0.05
0.95
0.80
0.25
0.30
0.19
0.2
0.1
6.6
6.4
4.5
4.3
0.65
6.6
6.2
1
0.75
0.50
0.4
0.3
0.2
0.13
0.1
0.5
0.2
8
o
0
o
Notes
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
2. Plastic interlead protrusions of 0.25 mm maximum per side are not included.
OUTLINE
VERSION
SOT360-1
REFERENCES
IEC
JEDEC
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-19
MO-153
Fig 24. TSSOP20 package outline (SOT360-1)
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NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
DIP20: plastic dual in-line package; 20 leads (300 mil)
SOT146-1
ME
seating plane
D
A2
A
A1
L
c
e
Z
b1
w M
(e 1)
b
MH
11
20
pin 1 index
E
1
10
0
5
10 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
UNIT
A
max.
A1
min.
A2
max.
b
b1
c
mm
4.2
0.51
3.2
1.73
1.30
0.53
0.38
0.36
0.23
26.92
26.54
inches
0.17
0.02
0.13
0.068
0.051
0.021
0.015
0.014
0.009
1.060
1.045
D
e
e1
L
ME
MH
w
Z (1)
max.
6.40
6.22
2.54
7.62
3.60
3.05
8.25
7.80
10.0
8.3
0.254
2
0.25
0.24
0.1
0.3
0.14
0.12
0.32
0.31
0.39
0.33
0.01
0.078
(1)
E
(1)
Note
1. Plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included.
OUTLINE
VERSION
SOT146-1
REFERENCES
IEC
JEDEC
JEITA
MS-001
SC-603
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-13
Fig 25. DIP20 package outline (SOT146-1)
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8-bit microcontroller with accelerated two-clock 80C51 core
13. Abbreviations
Table 16.
P89LPC97X
Product data sheet
Abbreviations
Acronym
Description
CCU
Capture/Compare Unit
CPU
Central Processing Unit
CRC
Cyclic Redundancy Check
DAC
Digital to Analog Converter
EEPROM
Electrically Erasable Programmable Read-Only Memory
EMI
Electro-Magnetic Interference
EPROM
Erasable Programmable Read-Only Memory
GPIO
General Purpose Input/Output
IRC
Internal RC
LSB
Least Significant Bit
MSB
Most Significant Bit
PGA
Programmable Gain Amplifier
PLL
Phase-Locked Loop
PWM
Pulse Width Modulator
RAM
Random Access Memory
RC
Resistance-Capacitance
RTC
Real-Time Clock
SAR
Successive Approximation Register
SFR
Special Function Register
SPI
Serial Peripheral Interface
UART
Universal Asynchronous Receiver/Transmitter
WDT
Watchdog Timer
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8-bit microcontroller with accelerated two-clock 80C51 core
14. Revision history
Table 17.
Revision history
Document ID
Release date
Data sheet status
Change notice
Supersedes
P89LPC97X v.3
20100608
Product data sheet
-
P89LPC97X_2
Modifications:
P89LPC97X_2
Modifications:
P89LPC97X_1
P89LPC97X
Product data sheet
•
•
Section 7.4 “Crystal oscillator option” on page 19: Updated text.
Section 7.27 “Watchdog timer” on page 40: Updated text.
20100427
Product data sheet
-
P89LPC97X_1
•
•
Changed data sheet status to ‘Product data sheet’.
•
Table 11 “Static characteristics”: Updated conditions and Min/Max/Unit values for (dV/dt)r.
Table 11 “Static characteristics”: Updated Min/Typ/Max values for BOD interrupt and BOD
reset.
20091217
Preliminary data sheet
-
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 8 June 2010
-
© NXP B.V. 2010. All rights reserved.
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8-bit microcontroller with accelerated two-clock 80C51 core
15. Legal information
15.1 Data sheet status
Document status[1][2]
Product status[3]
Definition
Objective [short] data sheet
Development
This document contains data from the objective specification for product development.
Preliminary [short] data sheet
Qualification
This document contains data from the preliminary specification.
Product [short] data sheet
Production
This document contains the product specification.
[1]
Please consult the most recently issued document before initiating or completing a design.
[2]
The term ‘short data sheet’ is explained in section “Definitions”.
[3]
The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.nxp.com.
15.2 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. NXP Semiconductors does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences of
use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is intended
for quick reference only and should not be relied upon to contain detailed and
full information. For detailed and full information see the relevant full data
sheet, which is available on request via the local NXP Semiconductors sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.
Product specification — The information and data provided in a Product
data sheet shall define the specification of the product as agreed between
NXP Semiconductors and its customer, unless NXP Semiconductors and
customer have explicitly agreed otherwise in writing. In no event however,
shall an agreement be valid in which the NXP Semiconductors product is
deemed to offer functions and qualities beyond those described in the
Product data sheet.
15.3 Disclaimers
Limited warranty and liability — Information in this document is believed to
be accurate and reliable. However, NXP Semiconductors does not give any
representations or warranties, expressed or implied, as to the accuracy or
completeness of such information and shall have no liability for the
consequences of use of such information.
In no event shall NXP Semiconductors be liable for any indirect, incidental,
punitive, special or consequential damages (including - without limitation - lost
profits, lost savings, business interruption, costs related to the removal or
replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards
customer for the products described herein shall be limited in accordance
with the Terms and conditions of commercial sale of NXP Semiconductors.
malfunction of an NXP Semiconductors product can reasonably be expected
to result in personal injury, death or severe property or environmental
damage. NXP Semiconductors accepts no liability for inclusion and/or use of
NXP Semiconductors products in such equipment or applications and
therefore such inclusion and/or use is at the customer’s own risk.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. NXP Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Customers are responsible for the design and operation of their applications
and products using NXP Semiconductors products, and NXP Semiconductors
accepts no liability for any assistance with applications or customer product
design. It is customer’s sole responsibility to determine whether the NXP
Semiconductors product is suitable and fit for the customer’s applications and
products planned, as well as for the planned application and use of
customer’s third party customer(s). Customers should provide appropriate
design and operating safeguards to minimize the risks associated with their
applications and products.
NXP Semiconductors does not accept any liability related to any default,
damage, costs or problem which is based on any weakness or default in the
customer’s applications or products, or the application or use by customer’s
third party customer(s). Customer is responsible for doing all necessary
testing for the customer’s applications and products using NXP
Semiconductors products in order to avoid a default of the applications and
the products or of the application or use by customer’s third party
customer(s). NXP does not accept any liability in this respect.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above those given in
the Recommended operating conditions section (if present) or the
Characteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanently and irreversibly affect
the quality and reliability of the device.
Terms and conditions of commercial sale — NXP Semiconductors
products are sold subject to the general terms and conditions of commercial
sale, as published at http://www.nxp.com/profile/terms, unless otherwise
agreed in a valid written individual agreement. In case an individual
agreement is concluded only the terms and conditions of the respective
agreement shall apply. NXP Semiconductors hereby expressly objects to
applying the customer’s general terms and conditions with regard to the
purchase of NXP Semiconductors products by customer.
Right to make changes — NXP Semiconductors reserves the right to make
changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all information supplied prior
to the publication hereof.
No offer to sell or license — Nothing in this document may be interpreted or
construed as an offer to sell products that is open for acceptance or the grant,
conveyance or implication of any license under any copyrights, patents or
other industrial or intellectual property rights.
Suitability for use — NXP Semiconductors products are not designed,
authorized or warranted to be suitable for use in life support, life-critical or
safety-critical systems or equipment, nor in applications where failure or
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from national authorities.
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Product data sheet
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Non-automotive qualified products — Unless this data sheet expressly
states that this specific NXP Semiconductors product is automotive qualified,
the product is not suitable for automotive use. It is neither qualified nor tested
in accordance with automotive testing or application requirements. NXP
Semiconductors accepts no liability for inclusion and/or use of
non-automotive qualified products in automotive equipment or applications.
In the event that customer uses the product for design-in and use in
automotive applications to automotive specifications and standards, customer
(a) shall use the product without NXP Semiconductors’ warranty of the
product for such automotive applications, use and specifications, and (b)
whenever customer uses the product for automotive applications beyond
NXP Semiconductors’ specifications such use shall be solely at customer’s
own risk, and (c) customer fully indemnifies NXP Semiconductors for any
liability, damages or failed product claims resulting from customer design and
use of the product for automotive applications beyond NXP Semiconductors’
standard warranty and NXP Semiconductors’ product specifications.
15.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
I2C-bus — logo is a trademark of NXP B.V.
16. Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
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8-bit microcontroller with accelerated two-clock 80C51 core
17. Contents
1
General description . . . . . . . . . . . . . . . . . . . . . . 1
2
Features and benefits . . . . . . . . . . . . . . . . . . . . 1
2.1
Principal features . . . . . . . . . . . . . . . . . . . . . . . 1
2.2
Additional features . . . . . . . . . . . . . . . . . . . . . . 2
3
Ordering information . . . . . . . . . . . . . . . . . . . . . 3
3.1
Ordering options . . . . . . . . . . . . . . . . . . . . . . . . 3
4
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 4
5
Functional diagram . . . . . . . . . . . . . . . . . . . . . . 5
6
Pinning information . . . . . . . . . . . . . . . . . . . . . . 6
6.1
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
6.2
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 7
7
Functional description . . . . . . . . . . . . . . . . . . 10
7.1
Special function registers . . . . . . . . . . . . . . . . 10
7.2
Enhanced CPU . . . . . . . . . . . . . . . . . . . . . . . . 19
7.3
Clocks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.3.1
Clock definitions . . . . . . . . . . . . . . . . . . . . . . . 19
7.3.2
CPU clock (OSCCLK). . . . . . . . . . . . . . . . . . . 19
7.4
Crystal oscillator option. . . . . . . . . . . . . . . . . . 19
7.4.1
Low speed oscillator option . . . . . . . . . . . . . . 19
7.4.2
Medium speed oscillator option . . . . . . . . . . . 19
7.4.3
High speed oscillator option . . . . . . . . . . . . . . 19
7.5
Clock output . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.6
On-chip RC oscillator option . . . . . . . . . . . . . . 20
7.7
Watchdog oscillator option . . . . . . . . . . . . . . . 20
7.8
External clock input option . . . . . . . . . . . . . . . 20
7.9
Clock source switching on the fly . . . . . . . . . . 20
7.10
CCLK wake-up delay . . . . . . . . . . . . . . . . . . . 21
7.11
CCLK modification: DIVM register . . . . . . . . . 21
7.12
Low power select . . . . . . . . . . . . . . . . . . . . . . 21
7.13
Memory organization . . . . . . . . . . . . . . . . . . . 22
7.14
Data RAM arrangement . . . . . . . . . . . . . . . . . 22
7.15
Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
7.15.1
External interrupt inputs . . . . . . . . . . . . . . . . . 23
7.16
I/O ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
7.16.1
Port configurations . . . . . . . . . . . . . . . . . . . . . 25
7.16.1.1 Quasi-bidirectional output configuration . . . . . 25
7.16.1.2 Open-drain output configuration . . . . . . . . . . . 25
7.16.1.3 Input-only configuration . . . . . . . . . . . . . . . . . 26
7.16.1.4 Push-pull output configuration . . . . . . . . . . . . 26
7.16.2
Port 0 analog functions . . . . . . . . . . . . . . . . . . 26
7.16.3
Additional port features. . . . . . . . . . . . . . . . . . 26
7.16.4
Pin remap . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
7.17
Power management . . . . . . . . . . . . . . . . . . . . 27
7.17.1
Brownout detection . . . . . . . . . . . . . . . . . . . . . 27
7.17.2
Power-on detection. . . . . . . . . . . . . . . . . . . . . 28
7.17.3
Power reduction modes . . . . . . . . . . . . . . . . . 28
7.17.3.1 Idle mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
7.17.3.2
7.17.3.3
7.17.4
7.18
7.18.1
7.19
7.19.1
7.19.2
7.19.3
7.19.3.1
7.19.3.2
7.19.4
7.20
7.20.1
7.20.2
7.20.3
7.20.4
7.21
7.22
7.22.1
7.22.2
7.22.3
7.22.4
7.22.5
7.22.6
7.22.7
7.22.8
7.22.9
7.22.10
7.23
7.24
7.24.1
7.25
7.25.1
7.25.2
7.25.3
7.26
7.27
7.28
7.28.1
7.28.2
7.29
7.29.1
7.29.2
Power-down mode . . . . . . . . . . . . . . . . . . . . .
Total Power-down mode . . . . . . . . . . . . . . . .
Regulators . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reset vector. . . . . . . . . . . . . . . . . . . . . . . . . .
Timers/counters 0 and 1 . . . . . . . . . . . . . . . .
Mode 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mode 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mode 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mode 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mode 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Timer overflow toggle output . . . . . . . . . . . . .
Timers/counters 2, 3 and 4 . . . . . . . . . . . . . .
Mode 0: 16-bit timer/counter with
auto-reload. . . . . . . . . . . . . . . . . . . . . . . . . . .
Mode 1: 16-bit timer/counter with input
capture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mode 2: 16-bit PWM mode . . . . . . . . . . . . . .
Timer overflow toggle output . . . . . . . . . . . . .
RTC/system timer . . . . . . . . . . . . . . . . . . . . .
UART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mode 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mode 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mode 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mode 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Baud rate generator and selection. . . . . . . . .
Framing error . . . . . . . . . . . . . . . . . . . . . . . . .
Break detect. . . . . . . . . . . . . . . . . . . . . . . . . .
Double buffering. . . . . . . . . . . . . . . . . . . . . . .
Transmit interrupts with double buffering
enabled (modes 1, 2 and 3) . . . . . . . . . . . . . .
The 9th bit (bit 8) in double buffering
(modes 1, 2 and 3). . . . . . . . . . . . . . . . . . . . .
I2C-bus serial interface. . . . . . . . . . . . . . . . . .
SPI (Pin remap) . . . . . . . . . . . . . . . . . . . . . . .
Typical SPI configurations . . . . . . . . . . . . . . .
Analog comparators . . . . . . . . . . . . . . . . . . . .
Selectable internal reference voltage. . . . . . .
Comparator interrupt . . . . . . . . . . . . . . . . . . .
Comparators and power reduction modes . . .
KBI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Watchdog timer . . . . . . . . . . . . . . . . . . . . . . .
Additional features . . . . . . . . . . . . . . . . . . . . .
Software reset . . . . . . . . . . . . . . . . . . . . . . . .
Dual data pointers . . . . . . . . . . . . . . . . . . . . .
Flash program memory . . . . . . . . . . . . . . . . .
General description . . . . . . . . . . . . . . . . . . . .
Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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P89LPC97X
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 8 June 2010
© NXP B.V. 2010. All rights reserved.
65 of 66
P89LPC970/971/972
NXP Semiconductors
8-bit microcontroller with accelerated two-clock 80C51 core
7.29.3
7.29.4
7.29.5
7.29.6
7.29.7
7.29.8
7.29.9
7.29.10
7.30
7.31
8
9
10
10.1
10.2
11
11.1
12
13
14
15
15.1
15.2
15.3
15.4
16
17
Flash organization . . . . . . . . . . . . . . . . . . . . .
Using flash as data storage . . . . . . . . . . . . . .
Flash programming and erasing . . . . . . . . . . .
ICP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ISP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power-on reset code execution . . . . . . . . . . .
Hardware activation of the bootloader . . . . . .
User configuration bytes . . . . . . . . . . . . . . . . .
User sector security bytes . . . . . . . . . . . . . . .
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . .
Static characteristics. . . . . . . . . . . . . . . . . . . .
Dynamic characteristics . . . . . . . . . . . . . . . . .
Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . .
ISP entry mode . . . . . . . . . . . . . . . . . . . . . . . .
Other characteristics . . . . . . . . . . . . . . . . . . . .
Comparator electrical characteristics . . . . . . .
Package outline . . . . . . . . . . . . . . . . . . . . . . . .
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . .
Revision history . . . . . . . . . . . . . . . . . . . . . . . .
Legal information. . . . . . . . . . . . . . . . . . . . . . .
Data sheet status . . . . . . . . . . . . . . . . . . . . . .
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . .
Contact information. . . . . . . . . . . . . . . . . . . . .
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP B.V. 2010.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
Date of release: 8 June 2010
Document identifier: P89LPC97X
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