STK526 Rev. B Hardware User Guide ..............................................................................................

STK526 Rev. B Hardware User Guide ..............................................................................................
STK526 Rev. B
..............................................................................................
Hardware User Guide
Section 1
Introduction ........................................................................................... 1-3
1.1
1.2
Overview ...................................................................................................1-3
STK526 - AT90USB82/162 Starter Kit Features.......................................1-4
Section 2
Using the STK526................................................................................. 2-6
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
2.10
2.11
2.12
Overview ...................................................................................................2-6
Power Supply ............................................................................................2-7
RESET ....................................................................................................2-11
AT90USB82/162 AVR Microcontroller ....................................................2-12
Serial Links .............................................................................................2-12
On-board Resources...............................................................................2-16
STK500 Resources .................................................................................2-18
In-System Programming .........................................................................2-19
Debugging...............................................................................................2-23
Test Points ..............................................................................................2-23
Configuration Pads .................................................................................2-24
Solder Pads ............................................................................................2-25
Section 3
Troubleshooting Guide ....................................................................... 3-26
Section 4
Technical Specifications ..................................................................... 4-28
Section 5
Technical Support ............................................................................... 5-29
Section 6
Complete Schematics ......................................................................... 6-30
STK526 rev. B Hardware User Guide
1
7709A–AVR–03/07
Section 1
Introduction
Congratulation for acquiring the AVR® STK526 - AT90USB82/162 Starter Kit. This kit is
designed to give designers a quick start to develop code on the AT90USB82/162 and
for prototyping and testing of new designs.
1.1
Overview
This document describes the STK526 dedicated to the AT90USB82/162 AVR
microcontroller. This board is designed to allow an easy evaluation of the product using
demonstration software. This documents applies to the revision B of the board.
To complement the evaluation and enable additional development capability, the
STK526 can be plugged into the Atmel STK500 Starter Kit Board in order to use the
AT90USB82/162 with advanced features such as variable VCC, variable XTAL, Parallel
Programming, etc. and supports all AVR development tools.
To increase its demonstrative capabilities, this stand alone board has numerous onboard resources (USB, RS232, joystick, data-flash, LEDs).
This user guide acts as a general getting started guide as well as a complete technical
reference for advanced users.
STK526 rev. B Hardware User Guide
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7709B–AVR–05/07
Introduction
Figure 1-1 . STK526 Board
1.2
STK526 - AT90USB82/162 Starter Kit Features
The STK526 rev. B provides the following features:
AT90USB82/162 TQFP device (2.7V<Vcc<5.5V),
AVR Studio® software interface (1),
USB software interface for Device Firmware Upgrade (DFU bootloader) (2)
STK500 compatible (supports Parallel High-Voltage Programming)
Power supply flagged by “POWER-ON” LED:
–
–
–
–
–
regulated 3.3 or 5V,
from an external power connector,
from the USB interface (USB device bus powered application),
from STK500 (2),
or using the 3.3V embedded regulator of AT90USB82/162
ISP connector :
– for on-chip ISP,
– for on-chip debugging using JTAG ICE and debugWire protocol,
Serial interfaces:
– 1 USB full speed device interface
– RS-232C ports with RTS/CTS handshake lines,
On-board resources:
– 4-ways + 1-select joystick,
– 4 LEDs,
– serial 8Mo dataflash memory,
On-board RESET button,
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STK526 rev. B Hardware User Guide
Introduction
On-board HWB button for force bootloader section execution at reset.
System clock:
– external clock from STK500 expand connectors
– 8 MHz crystal,
Numerous access points for test.
Notes:
STK526 rev. B Hardware User Guide
1. The STK526 is supported by AVR Studio®, version 4.12SP2 or higher. For up-to-date
information on this and other AVR tool products, please consult our web site. The
newest version of AVR Studio®, AVR tools and this User Guide can be found in the
AVR section of the Atmel web site, http://www.atmel.com.
2. ATMEL Flip®, In System Programming Version 3 or Higher shall be used for Device
Firmware Upgrade. Please consult Atmel web site to retrieve the latest version of Flip
and the DFU bootloader Hex file if needed.
1-5
7709B–AVR–05/07
Section 2
Using the STK526
This chapter describes the board and all its features.
2.1
Overview
Figure 2-1 . STK526 Overview
USB
RS232
Power
SPI /
debugWire
Vcc
Source
3V3 Reg
Joystick
Dataflash
Crystal
STK526 rev. B Hardware User Guide
LEDs
Hardware Reset
Boot
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Using the STK526
2.2
Power Supply
The on-board power supply circuitry allows various power supply configurations.
Because the AT90USB82/162 contains an internal 3V3 regulator that can be used to
power an external circuitry, several power configurations are handled by the STK526.
The power path is represented by the figure below :
Figure 2-2 . STK526 Power Configuration
5V
REG5V
3V3
REG3V3
(3V3 REG)
NOREG
STK500
(2)
Vcc
VBUS
UVcc
VBUS
INTREG
(1)
Vsource
Ucap
EXT (JACK)
STK
(VCC SOURCE)
Internal
3V3 100mA
Regulator
AT90USBxx2
First, the board allows to drain power from three external sources, leading to four
different solutions. The selected voltage is applied to the regulator input of the
AT90USB82/162. Then user can choose to power the MCU I/O either directly with the
primary power source (external 5V/3V3), or from the internal regulator itself (MCU autopower).
2.2.1
Power Supply Sources
The power supply can come from three different (3) sources:
USB connector,
JACK PWR connector (J5, See Figure 2-3),
STK500
USB powered: When used as a USB device bus powered application, the STK526 can be powered via
the USB VBUS power supply line.
JACK PWR connector:
STK526 rev. B Hardware User Guide
– Need of a male JACK outlet,
– Input supply from 9 up to 15V (1) DC,
– No specific polarization (2) is required.
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Using the STK526
Figure 2-3 . JACK PWR Connector (J6)
Figure 2-4 . Male JACK Outlet and Wires
+
-
STK500 Powered: (c.f. “STK500 Resources” on page 18).
Notes:
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7709B–AVR–05/07
1. 15V is the maximum level limitation of an unidirectional transit diode.
2. There is a diode (bridge) voltage level between the negative output of the power
supply and the STK526 “GND”. This could introduce some gap of voltage during
measurement and instrumentation.
3. Caution: Do not set more than one power supply source on STK526.
STK526 rev. B Hardware User Guide
Using the STK526
2.2.2
Power Source Setting
Table 2-1 . Power Supply (1) Setting
Vcc Source
Jumper position
VBUS
VCC power
supply value
Comments
VBUS
(4,8V to 5.2V)
This is the default configuration.
This should be used for a typical USB
device “bus powered” application.
In this mode, the STK526 is powered
directly from the USB bus, and no
other external power supply is
required.
View
VCC
Source
Reg 5
Reg 3.3
VBUS 5
STK
This configuration can be used for a
USB “self powered” device
application”.
REG 5V
5V
To use this configuration an external
power supply must be connected to
J5 connector. The on-board 5V
regulator is used.
VCC
Source
Reg 5
Reg 3.3
VBUS 5
STK
VCC
Source
This configuration allows the STK526
to be used in a 3V range application.
Reg 5
REG 3V3
To use this configuration an external
power supply must be connected to
J5 connector. The on-board 3V3
regulator is used.
3.3V
Reg 3.3
VBUS 5
STK
STK
Depends on
STK500 VTG
setting
This configuration allows the STK526
to be used with an STK500 board.
In this mode, the STK526 power
supply is generated and configured
according to the “VTG” parameter of
the STK500 (1).
VCC
Source
Reg 5
Reg 3.3
VBUS 5
STK
Notes:
STK526 rev. B Hardware User Guide
1. Caution: The STK500 has its own “ON/OFF” switch
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Using the STK526
2.2.3
AT90USB82/162 Power Configuration Settings
This section applies to the following part of the power path diagram :
Figure 2-5 . MCU Power Configurations
(3V3 REG)
NOREG
Ucap
(2)
Vcc
UVcc
Vsource
)
INTREG
(1)
Internal
3V3 100mA
Regulator
AT90USBxx2
Once the power source selected, the internal regulator input of the AT90USB82/162
(UVcc) is powered. Firmware has the responsability to enable or disable the regulator.
Ucap is the output pin of the internal regulator (decoupled with a 1µF capacitor), and
Vcc is the main power source of the MCU. Several cases may be required by the user :
Vsource = 5V, Vcc = 5V : in this mode, the configuration switch (see figure above)
must be in position serigraphied “NOREG”. The MCU can still run a USB Device
application if it enables the internal regulator that will power the USB pad and macro.
Vsource = 5V, Vcc = 3.3V : in this mode, the configuration switch must be in the
position serigraphied “INTREG”. The Vcc pin will be tied to the regulator output, so
that the AT90USB82/162 itself will power itself from its regulator, and the I/O will be
at 3V3 level.
Vsource = 3.3V, Vcc = 3.3V : in this mode all the MCU power inputs are at the 3V3
level. The configuration switch must be in the position “NOREG”. In normal operation
it is recommended to tie all the power pins together (UVcc, Vcc, Ucap) and to disable
the regulator. But the board configuration does not allow to tie together all the power
pins, so that the regulator must be enabled by firmware in order to power the USB
pad and macro (that can lead to some extra-consumption).
Table 2-2 . MCU Power Configuration Jumpers
“3V3 REG”
Jumper position
AT90USB16 I/O power supply
Comments
View
3V3 REG
2-10
7709B–AVR–05/07
Internal regulator
This configuration is relevant with a
5V primary powered application
requiring I/O level at 3.3V on the
AT90USB82/162.
INTREG
NOREG
This is the default configuration.
3V3 REG
INTREG
“INTREG”
Primary power source
NOREG
“NOREG”
STK526 rev. B Hardware User Guide
Using the STK526
2.2.4
“POWER-ON“ LED
The POWER-ON LED is always lit when power is applied to STK526 regardless of
power supply source and the regulation.
Figure 2-6 . “VCC-ON” LED
2.3
RESET
Although the AT90USB82/162 has its on-chip RESET circuitry (c.f. AT90USB82/162
Datasheet, section “System Control and Reset), the STK526 provides the
AT90USB82/162 a RESET signal which can come from 3 different sources:
2.3.1
Power-on RESET
The power supply rise time acts as power-on RESET.
2.3.2
RESET Push Button
By pressing the RESET push button on the STK526, a warm RESET of the
AT90USB82/162 is performed.
Figure 2-7 . RESET Push Button (RST) Implementation
STK526 rev. B Hardware User Guide
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Using the STK526
2.3.3
STK500 RESET
(c.f. “RESET from STK500” on page 19)
2.4
AT90USB82/162 AVR Microcontroller
2.4.1
Main Clock XTAL
To use the USB interface of the AT90USBxxx, the clock source should always be a
crystal or external clock oscillator (the internal 8MHz RC oscillator cannot be used
successfully to operate with the USB interface). Only the following crystal frequency
allows proper USB operations: 8MHz, 16MHz. The STK526 comes with a default 8MHz
crystal oscillator.
When closing STKX1 and STKX2 switches, and STK526 is connected to an STK500,
the STK526 can operate with the “STK500 Osc” frequency parameter. The STK500
clock precedes the crystal connected.
2.4.2
Analog Power Supply
AVCC AVCC is tied to VCC by hardware.
2.5
Serial Links
2.5.1
USB
The STK526 is supplied with a standard USB type-B receptacle (identifying the board as
a Device only) that aim to receive a B-plug
Figure 2-8 . USB type-B receptacle
VBUS Detection The board also implement a VBUS detection on a generic I/O. A low-power (50µA)
voltage divider (/2) is connected from VBUS to PortC bit 2 pin. The VBUS presence is
detected with a high level on the MCU pin.
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STK526 rev. B Hardware User Guide
Using the STK526
VBUS Power Source Moreover, VBUS, even if not selected as primary power source, powers the on-board
3.3V regulator (through a diode to avoid current supply to USB) in order to get 3V3
voltage in any condition (this allows to power the dataflash at any time, or to allow a
USB Bus-powered operation with all the board in 3.3V. Since this feature can make
current flowing from VBUS to power the board (and make unwanted extraconsumption), it can be disabled by cutting the configuration pad. See
Section “Configuration Pads”, page 25 for details.
STK526 rev. B Hardware User Guide
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Using the STK526
2.5.2
RS-232C
The AT90USB82/162 is a microcontroller with an on-chip USART peripheral (USART1).
Only the asynchronous mode is supported by the STK526.
The STK526 is supplied with a RS-232 driver/receiver. One female DB9 connector
assumes the RS-232 connections.
Figure 2-9 . RS-232 DB9 Connections
pin 2
pin 3
RS-232 DB9 front view
5 4 3 2 1
9 8 7 6
RS-TxD
RS-RxD
pin 4
pin 6
pin 5
GND
pin 7
pin 8
RS-CTS
RS-RTS
Figure 2-10 . Typical PC Connection Layout
PC / DB9 serial port
(COM1 or COMx)
STK525 / RS-232 DB9
Function
Pin No
Pin No
Function
TxD (AT90USBxxx)
RxD (AT90USBxxx)
2
3
2
3
RxD (PC)
TxD (PC)
GND
5
5
GND
7
8
RTS (PC)
CTS (PC)
If Hardware Data Flow Control
CTS (AT90USBxxx)
RTS (AT90USBxxx)
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8
STK526 rev. B Hardware User Guide
Using the STK526
The STK526 USART implementation allows an optional hardware flow control that can
be enabled thanks to SP1, SP2, SP3, SP4 solder pads (See Figure 2-11).
Figure 2-11 . USART Schematic
VCC
16
RS232 Interface
.
U5
C13
VCC
1
100nF
3
4
C14
5
PD[7..0]
C1+
V+
C1C2+
V-
RxD
12
PD3
T XD
11
PD7
CT S
10
PD6
RT S
9
6
RS 232
.
.
.
.
P1
13
RS-T xD
RS-CT S
.
.
.
SP2
7
RS-RT S
8
SP4
.
.
RS-RxD
14
SP1
SP3
C15
100nF
C17
100nF
C2TTL
100nF
PD2
2
1
6
2
7
3
8
4
9
5
11
10
15
GND
MAX3232
RS232 BUFFER
SUB-D9 FEMALE
RS232
Note that the AT90USB82/162 integrates the Hardware Flow Control in its USART
peripheral without special management by firmware (except init).
Table 2-3 . UART Settings
Note:
STK526 rev. B Hardware User Guide
Mode
Solder Pads
Configuration
Software Data Flow
Control
(default configuration)
SP4: open
SP5: open
SP7: open
SP8: open
Optional
Hardware Flow Control
SP4: close
SP5: close
SP7: close
SP8: close
DB9
Connection (1)
Tx Pin 2
Rx Pin 3
Tx
Rx
CTS
RTS
Pin 2
Pin 3
Pin 7
Pin 8
1. Tx reference: STK526 source, Rx reference: STK526 destination
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7709B–AVR–05/07
Using the STK526
2.6
On-board Resources
2.6.1
Joystick
The 4+1 way joystick offers an easy user interface implementation for a USB application
(it can easily emulate mouse movements, keyboard inputs, etc.).
Pushing a push-button causes the corresponding signal to be pulled low, while releasing
(not pressed) causes an H.Z state on the signal. The user must enable internal pull-ups
on the input pins, removing the need for an external pull-up resistors on the push-button.
Figure 2-12 . Joystick Schematic
PB[7..0]
SW3
1
2
Select
Lef t
Up
Right
Down
5
7
3
6
4
P
PB0
PB4
PB5
PB6
PB7
Com1
Com2
TPA511G
Figure 2-13 . Joystick Implementation
2.6.2
LEDs
The STK526 includes 4 green LEDs implemented on one line. They are connected to
the low nibble of “Port D” of AT90USB82/162 (PORTD[3..0]).
To light ON a LED, the corresponding port pin must drive to high level. To light OFF a
LED, the corresponding port pin must drive a low level. It is the opposite method used in
STK500.
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STK526 rev. B Hardware User Guide
Using the STK526
Figure 2-14 . LEDs Implementation Schematic
In-line Grouped LEDs
1k
R15
PD[7..0
LED 0 (green)
PD0
TOPLED LP M676
1k
R16
D2
LED 1 (green)
PD1
TOPLED LP M676
1k
R17
D3
LED 2 (green)
PD2
TOPLED LP M676
1k
R18
D4
LED 3 (green)
PD3
TOPLED LP M676
2.6.3
D5
Data Flash Memory
For USB Mass-storage class demonstration purposes, the STK526 provides an on-chip
serial Flash memory (AT45DB642x) connected to the AT90USB82/162 Serial Port
Interface (SPI).
The data-flash chip select signal is connected to PortC bit 2 of the AT90USB82/162
(See Figure 2-15).
Figure 2-15 . On-board data flash schematic
PB[7..0]
PB3
PB2
PB1
3.3V
R12
47k
R13
47k
U4
1
2
3
4
PC2
SI
SCK
RESET
CS
3.3V
SO
GND
VCC
WP
8
7
6
5
AT45DB642D CASON8
47k R14
C12
100nF
C16
100nF
Although the dataflash is 3.3V powered, it withstands without problem 5V level signals.
STK526 rev. B Hardware User Guide
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Using the STK526
2.7
STK500 Resources
Figure 2-16 . Connecting STK526 to the STK500 Board
Note:
2.7.1
Caution: Do not mount an AVR microcontroller on the STK500 board when STK526 is
plugged on STK500.
Supply Voltage from STK500
The AVR supply voltage coming from STK500 (VTG) can also be controlled from AVR
Studio®.
The supply voltage coming from STK500 is controlled by power supply circuitry of
the STK526. Refer to Table 2-1 on page 9 to configure “Vcc Source” jumper.
2.7.2
EXP.CON 0 & EXP.CON 1 Connectors
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7709B–AVR–05/07
STK526 rev. B Hardware User Guide
Using the STK526
Figure 2-17 . EXP.CON 0 and EXP.CON 1 Connectors
GND
n.c. (AUXI0)
n.c. (CT7)
n.c. (CT5)
n.c. (CT3)
n.c. (CT1)
n.c.
NRST
PG1
GND
VTG
PC7
PC5
PC3
PC1
PA7
PA5
PA3
PA1
GND
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35 36
37 38
39 40
GND
n.c. (AUXO0)
n.c. (CT6)
n.c. (CT4)
n.c. (CT2)
n.c. (BSEL2)
REF
PG2
PG0
GND
VTG
PC6
PC4
PC2
PC0
PA6
PA4
PA2
PA0
GND
GND
n.c. (AUXI1)
n.c. (DATA7)
n.c. (DATA5)
n.c. (DATA3)
n.c. (DATA1)
n.c. (SI)
n.c. (SCK)
XT1
VTG
GND
PB7
PB5
PB3
PB1
PD7
PD5
PD3
PD1
GND
EXP. CON 0
1 2
3 4
5 6
7 8
9 10
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
27 28
29 30
31 32
33 34
35 36
37 38
39 40
GND
n.c. (AUXO1)
n.c. (DATA6)
n.c. (DATA4)
n.c. (DATA2)
n.c. (DATA0)
n.c. (SO)
n.c. (CS)
XT2
VTG
GND
PB6
PB4
PB2
PB0
PD6
PD4
PD2
PD0
GND
EXP. CON 1
Top View
2.7.3
Main Clock from STK500
The AVR clock frequency (external) coming from STK500 (XT1/XT2) can also be
controlled from AVR Studio®.
“STKX1” and ”STKX2” jumpers should be closed
2.7.4
RESET from STK500
The AVR RESET coming from STK500 (NRST - EXP.CON 0) can also control the
STK526.
2.8
In-System Programming
2.8.1
Programming with USB bootloader: DFU (Device Firmware Upgrade)
AT90USB82/162 part comes with a default factory pre-programmed USB bootloader
located in the on-chip boot section of the AT90USB82/162. This is the easiest and
fastest way to reprogram the device directly over the USB interface. The “Flip” PC-side
application available for free on Atmel website offers a flexible and user friendly
interface to reprogram the application over the USB bus.
The HWB pin of the AT90USB82/162 allows to force the bootloader section execution
after reset. (Refer to AT90USB82/162 datasheet section “Bootloader support”). To force
bootloader execution, operate as follows:
Press both “RST” and “HWB” push buttons
First release the “RST” push button
Then release the “HWB” push button
STK526 rev. B Hardware User Guide
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Using the STK526
For more information about the USB bootloader and FLIP software, please refer to the
‘USB bootloader datasheet’ document and ‘FLIP User Manual’.
2.8.2
Programming with AVR ISP mkII Programmer
The AT90USB82/162 can be programmed using specific SPI serial links. This sub
section will explain how to connect the programmer.
The Flash, EEPROM and all Fuses and Lock Bits options ISP-programmable can be
programmed individually or with the sequential automatic programming option.
Note:
The SPIEN fuse must be enabled in AT90USB82/162 to allow ISP operation. The
SPIEN fuse is disabled when using debugWire channel (Section “Debugging”,
page 23)
The AVR ISP mkII programmer is a compact and easy-to-use In-System Programming
tool for developing applications with AT90USB82/162. Due to the small size, it is also an
excellent tool for field upgrades of existing applications.
The AVR ISP programming interface is integrated in AVR Studio®.
To program the device using AVR ISP programmer, connect the 6-wire cable on the ISP
connector of the STK526 as shown in Figure 2-18.
Note:
See AVR Studio® on-line Help for information.
Figure 2-18 . Programming from AVR ISP mkII programmer
2.8.3
Programming with AVR JTAG ICE
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STK526 rev. B Hardware User Guide
Using the STK526
The AT90USB82/162 can be programmed using ISP capability of the JTAGICE (using
the connector adapter that comes with the programmer). This sub-section will explain
how to connect and use the AVR JTAG ICE.
Note:
The SPIEN fuse must be enabled in AT90USB82/162 to allow ISP operation. The
SPIEN fuse is disabled when using debugWire channel (Section “Debugging”,
page 23)
Figure 2-19 . Connecting AVR JTAG ICE to STK526
The Flash, EEPROM and all Fuse and Lock Bit options ISP-programmable can be
programmed individually or with the sequential automatic programming option.
Note:
2.8.4
See AVR Studio® on-line Help for information.
Programming with STK500
Serial Programming The AT90USB82/162 can be programmed using the serial programming mode in the
AVR Studio STK500 software. The software interface (In-System Programming of an
external target system) is integrated in AVR Studio®.
To program the device using ISP from STK500, connect the 6-wire cable between the
ISP6PIN connector of the STK500 board and the ISP connector of the STK526 as
shown in Figure 2-16.
See AVR Studio® on-line Help for information.
See Figure 2-16 to see connection example for ISP with STK500.
STK526 rev. B Hardware User Guide
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Using the STK526
Parallel High-Voltage The STK526 is compatible with Parallel Programming mode of the STK500. The
Programming embedded RESET circuitry supports the HighVoltage pulses used during programming.
Once the STK526 plugged into the STK500 Expand connectors, the following
configuration must be set before powering the boards :
On the STK526 :
– set the primary power source (Vcc Src jumper) to STK and REG 5V
– set the 3V3REG jumper must be set to “NOREG”
– mount the jumper STKX1 to enable the STK500 clock signal
On the STK500 :
–
–
–
–
connect the PROG_CTRL header (10 pts) to the PORTD header (10pts)
connect the PROG_DATA header (10 pts) to the PORTB header (10pts)
mount the following jumpers : VTARGET, RESET, XTAL1, BSEL2
mount a jumper on the position 1-2 (= right side) of the OSCSEL header
All the Flash memory, EEPROM and all Fuse and Lock Bit options can be programmed
individually or with the sequential automatic programming option.
Figure 2-20 . Connecting STK526 to STK500 for High Voltage Parallel Programming
2-22
7709B–AVR–05/07
STK526 rev. B Hardware User Guide
Using the STK526
Figure 2-21 . STK526 Configuration for Parallel Programming
Parallel Programming allows any operation on the device. This mode is very usefull if a
crucial fuse has been erased inadvertently. For example, if user disables the SPIEN
fuse from ISP mode, it can only be restored using Parallel Programming.
2.9
Debugging
2.9.1
Debugging with AVR JTAG ICE mkII
Every STK526 can be used for debugging with JTAG ICE MK II using the debugWire
protocol through the ISP connector.
Connect the JTAG ICE mkII as shown in Figure 2-19 (like a simple programming
operation), for debugging help, please refer to AVR Studio® Help information.
When using JTAG ICE MK II for debugging, and as AT90USB82/162 parts are factory
configured with the higher security level set, a chip erase operation will be performed on
the part before debugging. Thus the on-chip flash bootloader will be erased. It can be
restored after the debug session using the bootloader hex file available from ATMEL
website.
Note:
2.10
Starting a debugWire session will enable the DWEN fuse and disable the SPIEN fuse,
that will prevent ISP programming. AVR Studio® can restore the SPIEN fuse before closing a debugWire session. However the fuse bits can also be restored in Parallel
Programming mode.
Test Points
There are 7 test points implemented, these test points are referred in the full schematics
section.
STK526 rev. B Hardware User Guide
Config.
Pads
Reference
Related Signals
TP1
D+
Function
USB D+ data line
2-23
7709B–AVR–05/07
Using the STK526
2-24
7709B–AVR–05/07
Config.
Pads
Reference
Related Signals
TP2
D-
TP3
VBUS
USB Vbus power line
TP4
Ucap
AT90USB82/162 internal 3V3 regulator output
TP5
5V
TP6
3.3V
3.3V on-board regulated power supply
TP7
Gnd
Ground (measure reference)
Function
USB D- data line
5V on-board regulated power supply
STK526 rev. B Hardware User Guide
Using the STK526
2.11
Configuration Pads
Configuration pads are used to disconnect/connect on-board peripherals or elements, their
default configuration is: connect.
2.11.1
Configuration Pads Listing
Table 2-4 . Configuration Pads
2.11.2
Config.
Pads
Reference
Related
Signals
CP1
VBUS
Function
Connect VBUS to the on-board 3V3 regulator. Cut to avoid
extra-consumption from USB (in self-powered application
only).
Configuration Pads - Disconnection
Figure 1. Configuration Pad - Disconnection
Cut Connection
2.11.3
Configuration Pads - Connection
Figure 2. Configuration Pad - Re-connection
Drop of solder
STK526 rev. B Hardware User Guide
Wire
2-25
7709B–AVR–05/07
2.12
Solder Pads
Solder pads are used to disconnect/connect on-board peripherals or elements, their default
configuration is: disconnect. User may solder the pad to enable it.
2.12.1
Solder Pads Listing
Table 2-5 . Solder Pads
STK526 rev. B Hardware User Guide
Solder.
Pads
Reference
Related
Signals
SP1
PD7 / CTS
SP2
RS232 / CTS
SP3
PD6 / RTS
SP4
RS232 / RTS
Function
This solder pad allows to enable the logical CTS signal for
hardware control flow on RS232 interface.
This solder pad allows to enable the physical CTS signal for
hardware control flow on RS232 interface.
This solder pad allows to enable the logical RTS signal for
hardware control flow on RS232 interface.
This solder pad allows to enable the physical CTS signal for
hardware control flow on RS232 interface.
2-26
7709B–AVR–05/07
Troubleshooting Guide
Section 3
Troubleshooting Guide
Figure 3-1 . Troubleshooting Guide
Problem
The Green “Power-ON”
LED is not on
Reason
Verify the power supply source level
No power supply
STK500
Configuration not
respected.
Connect ISP cable between STK500 and
STK526. Or check Parallel Programming
hardware configuration on both STK500
and STK526.
The AVR ISP probe is
not connected
Connect the AVR ISP 6-PIN header to
the correct STK526 ISP header (page
20). Take care to polarity.
The AVR JTAG ICE
probe is not
connected
Connect the JTAG ICE 10-PIN header to
the correct STK526 JTAG header (page
20). Take care to polarity.
The memory lock bits
are programmed
Erase the memory before programming
The fuse bits are
wrongly programmed
Check the fuse bits (SPIEN, DWEN if
previous operation was debugging).
Programming too fast
with ISP SPI
Check oscillator settings and make sure
it is not set higher than SPI clock
Serial/USB cable is
not connected, or
power is off
AVR Studio does not
detect the AVR tool used
PC COM port is in
use
AVR Studio does not
detect COM port.
STK526 rev. B Hardware User Guide
Verify the power supply source selector
Connect the DC power supply source, or
USB interface or STK500.
STK526 does not work
The AT90USB82/162
cannot be programmed
Solution
Connect serial cable to RS232 (STK500 AVR ISP) and check power connections
Connect serial cable to USB (JATG ICE
MKII, AVR ISPmkIIl) and check power
connections
Disable other programs that are using
PC COM port.
Change PC COM port
Disable COM port auto-detection in AVR
Studio file menu. Force COM port to
correct COM port
3-27
7709B–AVR–05/07
Section 4
Technical Specifications
System Unit
– Physical Dimensions ................................................. L=119 x W=56 x H=27 mm
– Weight ...........................................................................................................70 g
Operating Conditions
– Internal Voltage Supply .....................................................................2.7V - 5.5V
– External Voltage Supply ..........................................................9V -15V (100mA)
Connections
– USB Connector .......................................................................Type-B receptacle
– USB Communications .................................................................. Full speed 2.0
– RS 232C Connector .............................................................9-pin D-SUB female
– RS 232C Communications Maximum Speed ........................................ 250 kbps
STK526 rev. B Hardware User Guide
4-28
7709B–AVR–05/07
Section 5
Technical Support
For Technical support, please contact [email protected] When requesting technical
support, please include the following information:
Which target AVR device is used (complete part number)
Target voltage and speed
Clock source and fuse setting of the AVR
Programming method (ISP, Parallel or specific Boot-Loader)
Hardware revisions of the AVR tools, found on the PCB
Version number of AVR Studio. This can be found in the AVR Studio help menu.
PC operating system and version/build
PC processor type and speed
A detailed description of the problem
STK526 rev. B Hardware User Guide
5-29
7709B–AVR–05/07
Section 6
Complete Schematics
On the next pages, the following documents of STK526 revision 4381B are shown:
Complete schematics,
Assembly drawing,
Bill of materials.
Default configuration summary
STK526 rev. B Hardware User Guide
6-30
7709B–AVR–05/07
TP3
VBUS
D+
D-
TP4
UCAP
VBUS
D+
1
1
1
1
TP2
PC4
C6
15pF
C7
15pF
Y1
8MHz
UCAP
D-
VCC
PC2
XTAL1
XTAL2
GND
VCC
PC2
PD0
PD1
PD2
PC2
PD0
PD1
PD2
XTAL1
XTAL2
XTAL1
XTAL2
GND
VCC
PC2
PD0
PD1
PD2
1
2
3
4
5
6
7
8
U2
33
1
2
3
4
5
6
7
8
U1
UVCC
AVCC
R3
22
D+ D- RESISTORS
Closed to the MCU
PGB0010603
CR3
C2
2 2
UCAP
R4
22
Reset#
PC6
PC7
PB7
AT90USB16
PB6
PB5
PB4
PB3
BT
XTAL1
XTAL2
GND
VCC
PC2
PD0
PD1
PD2
Reset#
PC6
PC7
PB7
AT90USB16
PB6
PB5
PB4
PB3
24
23
22
21
20
19
18
17
24
23
22
21
20
19
18
17
C5
1
RESET
PC6
PC7
PB7
PB6
PB5
PB4
PB3
RESET
PC6
PC7
PB7
PB6
PB5
PB4
PB3
PB[7..0]
UGND
R5
0
NRST
VCC
AVCC
UVCC
C4
100nF
C3
100nF
C1
100nF
C25
4 7
VCC
SW2
RST
R7
10k
VCC
Date:
Size
B
Title
RESET
SW1
HWB
R6
47k
STK526 MEZZANINE FOR STK500
Thursday , Nov ember 23, 2006Sheet
Document Number
<Doc>
CPU
RESET
PD7
Force Bootloader Execution
DECOUPLING CAPACITORS
CLOSED TO THE DEVICE
MCU Pin4
DECOUPLING CAPACITORS
CLOSED TO THE DEVICE
MCU Pin32
DECOUPLING CAPACITORS
CLOSED TO THE DEVICE
MCU Pin31
Reset Circuit
PC[7..0]
USB Receptacle B
PGB0010603
CR2
UCAP Capacitor
Closed to the MCU
PGB0010603
CR1
<ASSEMBLY >
1-V_BUS
2-D3-D+ SHIELD
4-GND
J1
Note : U1b is a MLF32 package soldered
PD[7..0]
XTAL2
XTAL1
R2
47K
R1
47K
DD+
TP1
UGND
UCAP
PC4
PC5
32
31
30
29
28
27
26
25
AVCC
UVCC
D-/SDATA
D+/SCK
UGND
UCAP
PC4
PC5
PD3
PD4
PD5
PD6
PD7
PB0
PB1
PB2
9
10
11
12
13
14
15
16
PD3
PD4
PD5
PD6
PD7
PB0
PB1
PB2
AVCC
UVCC
DD+
UGND
UCAP
PC4
PC5
32
31
30
29
28
27
26
25
AVCC
UVCC
D-/SDATA
D+/SCK
UGND
UCAP
PC4
PC5
PD3
PD4
PD5
PD6
PD7
PB0
PB1
PB2
9
10
11
12
13
14
15
16
STK526 rev. B Hardware User Guide
PD3
PD4
PD5
PD6
PD7
PB0
PB1
PB2
VBUS
UGND
Note : U1 is mounted through a TQFP32 ZIF Socket
1
of
4
Rev
1.1
Complete Schematics
Figure 6-1 . Schematics, 1 of 4
6-31
7709B–AVR–05/07
6-32
7709B–AVR–05/07
2
XT 1
C9
PB7
PB5
PB3
PB1
PD7
PD5
PD3
PD1
100nF
VTG
STK X1
1
JP1
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
XT 2
10k
R11
C10
1nF
R10
2k
PC7
PC5
VTG
2k
R8
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
37
39
GND
GND
AUXO0
AUXI0
CT6
CT7
CT4
CT5
CT2
CT3
BSEL2
CT1
REF
(n.c.)
PE2
NRST
PE0
PE1
GND
GND
VTG
VTG
PC6
PC7
PC4
PC5
PC2
PC3
PC0
PC1
PA6
PA7
PA4
PA5
PA2
PA3
PA0
PA1
GND
GND
J3
NRST
C8
1nF
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
Date:
Size
A4
Title
CON 2x20
PB6
PB4
PB2
PB0
PD6
PD4
PD2
PD0
VTG
6
5
4
EXP. CON 0
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
XTAL2
BC847BPN
C_NPN
B_PNP
E_PNP
CON 2x20
GND
AUXO1
DATA6
DATA4
DATA0
DATA9
SO
CS
XT2
VTG
GND
PB6
PB4
PB2
PB0
PD6
PD4
PD2
PD0
GND
2
STK X2
1
U3
E_NPN
B_NPN
C_PNP
EXP. CON 1
GND
AUXI1
DATA7
DATA5
DATA3
DATA1
SI
SCK
XT1
VTG
GND
PB7
PB5
PB3
PB1
PD7
PD5
PD3
PD1
GND
J2
XTAL1
JP2
1
2
3
PC6
PC4
PC2
C11
100nF
PC6
Sheet
Wednesday , Nov ember 22, 2006
Document Number
<Doc>
STK500 Expand connectors
STK526 MEZZANINE FOR STK500
VTG
R9
10k
2
of
4
PB[7..0]
PC[7..0]
PD[7..0]
VTG
Rev
1.1
Complete Schematics
Figure 6-2 . Schematics, 2 of 4
STK526 rev. B Hardware User Guide
PC2
3.3V
R15
R16
R17
R18
1k
1k
1k
1k
LEDs
R12
47k
R13
47k
D1
D2
D3
TOPLED LP M676
D4
LED 3 (green)
TOPLED LP M676
LED 2 (green)
TOPLED LP M676
LED 1 (green)
TOPLED LP M676
LED 0 (green)
In-line Grouped LEDs
C16
100nF
PB3
PB2
PB1
SO
GND
VCC
WP
8
7
6
5
AT45DB642D CASON8
SI
SCK
RESET
CS
47k R14
PD5
PD4
PD1
PD0
Data Flash
PD[7..0]
Caution DataFlash
Fix 3V Power supply Only
1
2
3
4
U4
DECOUPLING CAPACITOR
CLOSE TO THE DEVICE
C12
100nF
3.3V
1
2
TPA511G
Com1
Com2
SW3
Select
Lef t
Up
Right
Down
5
7
3
6
4
Joystick Interface
PB[7..0]
RESET
PD6
PD7
SP3
RT S
CT S
T XD
PD3
SP1
RxD
PD2
100nF
C14
100nF
C13
9
10
11
12
5
3
4
1
.
.
.
.
TTL
GND
C2-
C1C2+
V-
V+
C15
100nF
8
7
14
RS-RT S
RS-T xD
RS-CT S
13RS-RxD
C17
100nF
6
2
SP4
SP2
VCC
1
6
2
7
3
8
4
9
5
RESET
Date:
Size
A4
Title
PB3
PB1
PB2
VCC
PDI
GND
C19
100nF
Friday , Nov ember 24, 2006 Sheet
Document Number
<Doc>
3
DECOUPLING CAPACITOR
CLOSE TO THE CONNECTOR
2
4
6
VCC
STK526 MEZZANINE FOR STK500
ISP CON
CON 2x3
PDO
SCK
RESET
Interf aces
1
3
5
J4
10
11
of
VCC
4
Rev
1.1
SUB-D9 FEMALE
RS232
P1
C18
100nF
DECOUPLING CAPACITOR
CLOSE TO THE DEVICE
MAX3232
RS232 BUFFER
.
.
.
.
RS 232
VCC
C1+
U5
VCC
RS232 Interface
DEBUG WIRE Interface and Serial ISP Interface
PD[7..0]
PB0
PB4
PB5
PB6
PB7
PB[7..0]
16
.
.
STK526 rev. B Hardware User Guide
15
PB[7..0]
Complete Schematics
Figure 6-3 . Schematics, 3 of 4
6-33
7709B–AVR–05/07
3.3V
1
TP6
3.3V
CONNECTOR JACK PWR
Ext Power Supply
3
2
1
5V
TP5
1
J5
5V
2
-
3
4
TP7
1
GND
+
1
U7
DF005S
VBUS
220nF
C23
C22
4.7uF
D6
LL4148
D5
LL4148
3
2
7
CP1
Vbus 3V3
OUT
OUT
FAULT
CC
SET
OUT
LM340
GND
IN
U8
LP3982
GND
IN
SHDN
U6
1
4
8
6
5
100nF
C24
33nF
C20
5V
100k 1% R20
R19
100k 1%
R21
124k 1%
3.3V
3.3V
U6out=1.25*(1+R28/R29)
Date:
Size
A4
Title
JP3
2
4
6
8
2
INTREG
-
AVCC
VCC
C21
4.7uF
Friday , Nov ember 24, 2006 Sheet
UVCC
4
R22
1k
of
4
POWER LED(RED)
D7
TOPLED LP M676
STK526 MEZZANINE FOR STK500
UCAP
NOREG
2
Document Number
<Doc>
POWER
UVCC
VCC Source
1
3
5
7
JP4
3V3 REG
STK
VBUS
REG 3V3
REG 5V
1
1
7709B–AVR–05/07
3
6-34
3
VTG
Rev
1.1
Complete Schematics
Figure 6-4 . Schematics, 4 of 4
STK526 rev. B Hardware User Guide
Complete Schematics
Figure 6-5 . Assembly Drawing, 1 of 2 (component side)
STK526 rev. B Hardware User Guide
6-35
7709B–AVR–05/07
Complete Schematics
Table 6-1 . Bill of Materials
Qtty
Schematic
Reference
Part Reference
Description
Case
CAPACITORS
14
C1,C3,C4,C9,
C11-C19, C24
100nF
Ceramic capacitor
0805
1
C2
2.2µF
Tantalum capacitor
Type A
1
C23
220nF
Ceramic capacitor
0805
1
C20
33nF
Ceramic capacitor
0805
2
C8, C10
1nF
Ceramic capacitor
0805
3
C21, C22, C25
4.7µF
Tantalum capacitor
Type A
1
C5
1µF
Tantalum capacitor
Type A
2
C6, C7
15pF
Ceramic capacitor
0805
3
CR1-CR3
PGB1010603MR
ESD Protection (Littlefuse)
0603
4
D1-D4
KA-3022SGC
Green LED
Mini Topled
1
D7
KA-3022SRC
Red LED
Mini Topled
2
D5, D6
LL4148
Small signal diode, If max 200mA
LL-34
DIODES
CONNECTORS
2
J2, J3
M20-6102005
PC104 2x20-pin through-hole female press-fit stackable
connector
2.54mm pitch
1
J1
USB type B
USB type B receptacle
Special
1
J4
Header 2x3
Male header 2x3 pts for ISP connection
2.54mm pitch
1
J5
Jack Power 2.1
Jack Power Receptacle with diam. 2.1mm
Special
1
P1
DB9 female
DB9 Female 90° receptacle for RS-232
Special
CONFIGURATION
2
JP1, JP2
Jumper 1x2
Header for configuration 1x2 pts
2.54mm pitch
1
JP3
Jumper 2x4
Header for configuration 2x4 pts
2.54mm pitch
1
JP4
Jumper 1x3
Header for configuration 1x3 pts
2.54mm pitch
1
CP1
Configuration Pad
Enabled by default. Can be disabled cutting it.
N/A
4
SP1-SP4
Solder Pad
Disabled by default. Can be enabled with a solder drop.
N/A
RESISTORS
5
R15-R18, R22
1 kOhms
1/16W-5% SMD
0805
2
R8, R10
2 kOhms
1/16W-1% SMD
0603
3
R7, R9, R11
10 kOhms
1/16W-5% SMD
0603
2
R3, R4
22 Ohms
1/16W-5% SMD
0603
6
R1, R2, R6,
R12-R14
47 kOhms
1/16W-1% SMD
0805
2
R19, R20
100 kOhms
1/16W-1% SMD
0805
1
R5
0 Ohms / strap
N/A
0603
1
R21
120 kOhms 1%
1/16W-1% SMD
0805
1
U1 socket
TQFP32 ZIF
Socket for QFP 32 pitch 0.8 mm 7x7 - 9x9 mm
Special
1
U1/U2
AT90USBxx2
MCU
TQFP32/QFN32
INTEGRATED CIRCUITS
6-36
7709B–AVR–05/07
STK526 rev. B Hardware User Guide
Complete Schematics
Table 6-1 . Bill of Materials
Qtty
Schematic
Reference
Part Reference
Description
Case
1
U4
AT45DB642C
8Mo dataflash memory
CASON8
1
U5
MAX3232ECAE+
RS232 transceiver
SSOP16
1
U8
LM340
5V regulator
SOT223
1
U6
LP3982IMM-ADJ
LDO regulator 3V3 (Vin max 6V), 300mA
MSOP8
1
U7
DBS104G
Diode bridge 400V 1A
Special
1
U3
BC847BPN
Transistor double NPN/PNP Ic max = 200mA
SC-88
2
SW1, SW2
Pushbutton
Normally Open ; 1.6N
6x3.5mm
1
SW3
TPA511G
4 ways joystick + center CMS mount
Special
7
TP1-TP7
Test Point
Test point for measurements
D=1.32mm
MISCELLANEOUS
1
Y1
8MHz
8MHz crystal
HQ49/4H
4
JP1-JP4
Shunts
Shunts for configuration headers
N/A
6.0.1
Default Configuration - Summary
Table 6-2 . Default Configuration summary
Name
Ref.
Function
State
Jumpers
STK X1
JP1
AT90USB82/162 Clock configuration pin X1
OPEN
STK X2
JP2
AT90USB82/162 Clock configuration pin X2
OPEN
VCC
SOURCE
JP3
Primary power source selection
“VBUS” position
3V3 REG
JP4
AT90USB82/162 I/O power selection
“NOREG”
position
Solder PADS
SP1
TTL - CTS
OPEN
SP2
RS232 - CTS
OPEN
SP3
TTL - RTS
OPEN
SP4
RS232 - RTS
OPEN
Configuration PADS
CP1
STK526 rev. B Hardware User Guide
Connect VBUS to 3V3 on-board regulator
CLOSED
6-37
7709B–AVR–05/07
Atmel Corporation
2325 Orchard Parkway
San Jose, CA 95131, USA
Tel: 1(408) 441-0311
Fax: 1(408) 487-2600
Regional Headquarters
Europe
Atmel Sarl
Route des Arsenaux 41
Case Postale 80
CH-1705 Fribourg
Switzerland
Tel: (41) 26-426-5555
Fax: (41) 26-426-5500
Asia
Room 1219
Chinachem Golden Plaza
77 Mody Road Tsimshatsui
East Kowloon
Hong Kong
Tel: (852) 2721-9778
Fax: (852) 2722-1369
Japan
9F, Tonetsu Shinkawa Bldg.
1-24-8 Shinkawa
Chuo-ku, Tokyo 104-0033
Japan
Tel: (81) 3-3523-3551
Fax: (81) 3-3523-7581
Atmel Operations
Memory
2325 Orchard Parkway
San Jose, CA 95131, USA
Tel: 1(408) 441-0311
Fax: 1(408) 436-4314
RF/Automotive
Theresienstrasse 2
Postfach 3535
74025 Heilbronn, Germany
Tel: (49) 71-31-67-0
Fax: (49) 71-31-67-2340
Microcontrollers
2325 Orchard Parkway
San Jose, CA 95131, USA
Tel: 1(408) 441-0311
Fax: 1(408) 436-4314
La Chantrerie
BP 70602
44306 Nantes Cedex 3, France
Tel: (33) 2-40-18-18-18
Fax: (33) 2-40-18-19-60
ASIC/ASSP/Smart Cards
1150 East Cheyenne Mtn. Blvd.
Colorado Springs, CO 80906, USA
Tel: 1(719) 576-3300
Fax: 1(719) 540-1759
Biometrics/Imaging/Hi-Rel MPU/
High Speed Converters/RF Datacom
Avenue de Rochepleine
BP 123
38521 Saint-Egreve Cedex, France
Tel: (33) 4-76-58-30-00
Fax: (33) 4-76-58-34-80
Zone Industrielle
13106 Rousset Cedex, France
Tel: (33) 4-42-53-60-00
Fax: (33) 4-42-53-60-01
1150 East Cheyenne Mtn. Blvd.
Colorado Springs, CO 80906, USA
Tel: 1(719) 576-3300
Fax: 1(719) 540-1759
Scottish Enterprise Technology Park
Maxwell Building
East Kilbride G75 0QR, Scotland
Tel: (44) 1355-803-000
Fax: (44) 1355-242-743
Literature Requests
www.atmel.com/literature
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