Atmel AVR32924: UC3-L0 XPLAINED Hardware User's Guide 32-bit

Atmel AVR32924: UC3-L0 XPLAINED Hardware User's Guide 32-bit
Atmel AVR32924: UC3-L0 XPLAINED Hardware
User's Guide
Features
• Atmel® AT32UC3L064 microcontroller
• Atmel AT32UC3B1256
- Board controller
- Communication gateway
• Analog input (to ADC)
- Temperature sensor
- RC filter
• Digital I/O
- One mechanical button switch
- Three LEDs
- Four expansion headers
• Footprints for external memory
®
- Atmel AT45DB series DataFlash serial flash
- Atmel AT25DF series industry standard serial flash
• Touch
- One Atmel QMatrix™ slider (alt. four QMatrix buttons)
- One Atmel QTouch® button
32-bit
Microcontrollers
Application Note
1 Introduction
The Atmel UC3-L0 Xplained evaluation kit is a hardware platform to evaluate the
Atmel AT32UC3L064 microcontroller.
The kit offers a large range of features that enables the Atmel AVR® UC3™ user to
get started using UC3 peripherals right away and understand how to integrate the
UC3 device in their own design.
Figure 1-1. UC3-L0 Xplained evaluation kit.
Rev. 32156B-AVR-03/11
2 Related items
AVR32 Studio® (free Atmel 32-bit IDE)
http://www.atmel.com/dyn/products/tools_card.asp?tool_id=4116
AVR JTAGICE mkII (on-chip programming and debugging tool)
http://www.atmel.com/dyn/products/tools_card.asp?tool_id=3353
AVR ONE! (on-chip programming and debugging tool)
http://www.atmel.com/dyn/products/tools_card.asp?tool_id=4279
AVR Software Framework (ASF)
http://asf.atmel.no/selector/show.php?device=uc3&store=app
3 General information
This document targets the Atmel AT32UC3L064 evaluation kit revision 4, and parts of
the document may, therefore, be inconsistent with earlier revisions of the product. For
earlier revisions, please refer to the schematics, which is the only documentation
available for these revisions. The Atmel UC3-L0 Xplained kit is intended to
demonstrate the AT32UC3L064 microcontroller, and the hardware that relates to the
Atmel AT32UC3B1256 (board controller) is, therefore, not covered in detail in this
document.
Figure 3-1. Overview of the UC3-L0 Xplained kit.
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Figure 3-2. Functional overview of the Atmel UC3-L0 Xplained kit.
EXPANSIONS
Four standard 10 pin
headers that can be used
with various top cards
Button
LEDs
Dataflash
HID
QTouch
button
MEMORIES
QMatrix
slider
AT32UC3L064
Temperature
Sensor,
PWM Voltage
generation
JTAG
USART/TWI
AT32UC3B1256
DEBUG
USB Device
3.1 Preprogrammed firmware
The Atmel AT32UC3L064 and the Atmel AT32UC3B1256 that come with the Atmel
UC3-L0 Xplained kit are both preprogrammed.
The preprogrammed firmware in the AT32UC3L064 is set up with a small demo with
the QMatrix touch slider and QTouch button that can be used to control the RGB
LED. The device also features a UART boot loader that can be used to program new
firmware to the device. Hold the mechanical button while applying power to start the
boot loader. The boot loader can be used with the command line tool “batchISP”
delivered with FLIP.
The preprogrammed AT32UC3B1256 firmware offers features such as a boot loader
for self-programming of the board controller itself and a UART-to-USB gateway. The
bootloader can be started by shorting the 2-pin header (not mounted) while applying
power to the board. The bootloader can be used with the command line tool
“BatchISP” delivered with FLIP.
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3.2 Power supply
The kit is powered via the USB connector, which leaves two options to power it:
Connect the kit either to a PC through a USB cable or to a 5V USB power supply
(AC/DC adapter).
The 5V is regulated down to 3.3V with an onboard LDO regulator, which provides
power to the entire board. The AT32UC3L064 is powered by 3.3V, but if 1.8V
operation is desired, some modifications to the board are needed. This includes
replacing the regulator with one that delivers 1.8V output and rerouting the power to
the device (see schematic for explanation). As some of the other ICs on the Atmel
UC3-L0 Xplained require 3.3V to operate correctly, these devices have to be removed
also.
3.3 Measuring the AT32UC3L064 power consumption
As part of an evaluation of the Atmel AT32UC3L064, it can be of interest to measure
its power consumption. The two-pin header with a jumper mounted on it is the only
connection between the common power plane VCC_P3V3 and the VCC_MCU_P3V3
power plane. By replacing the jumper with an ampere meter, it is possible to
determine the current consumption of the AT32UC3L064. To locate the power
measurement header, please refer to Figure 3-1.
WARNING
Do not power the board without having the jumper or an ampere meter
mounted. Otherwise, the device may be damaged.
3.4 Programming the AT32UC3L064 through the UART-to-USB gateway
The AT32UC3L064 can be programmed through the UART-to-USB gateway. This
can be accomplished using the UART boot loader preprogrammed in the device.
Press and hold the mechanical button switch while powering up the board to enter the
boot loader, and use 32-bit AVR Studio to set up a programming connection to the
device.
NOTE
If the default board controller firmware is replaced, programming of the
AT32UC3L064 may not be possible as the UART-to-USB functionality might be
missing.
NOTE
If any external programming tool is used on the AT32UC3L064, the boot loader might
be erased, and it will not be possible to program the device through the UART-to-USB
gateway. In this case the boot loader has to be restored with an external
programming tool.
3.5 Communication through the UART-to-USB gateway
The AT32UC3L064 UART is connected to a UART on the Atmel AT32UC3B1256.
The AT32UC3B1256 UART is communicating at 57600 baud, using one start bit,
eight data bits, one stop bit, and no parity.
When the AT32UC3B1256 device is enumerated (connected to a PC), the data
transmitted from the AT32UC3L064 is passed on to a (virtual) COM port. This means
that it is possible to use a terminal program to receive the transmitted data on a PC.
Similarly data transmitted from the PC COM port is passed on to the AT32UC3L064
UART through the gateway.
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4 Connectors
The UC3-L0 Xplained kit has five 10-pin, 100mil headers. Two headers have a fixed
communication interface (J1 and J4). One header has analog functionality (J2), and
the last header (J3) has general purpose digital I/O.
The 90° angled header is the JTAG programming and debugging header for the
AT32UC3L064.
For the location of the respective headers, refer to Figure 3-1.
4.1 Programming headers
The Atmel AT32UC3L064 can be programmed and debugged by connecting an
external programming/debugging tool to the JTAG header. The header has a
standard JTAG programmer pinout (refer to online help in AVR Studio), and tools
such as JTAGICE mkII or AVR ONE! can thus be connected directly to the header.
NOTE
The grey female 10-pin header on JTAGICE mkII has to be used when connecting to
the kit. A scoring in the board is made to fit the orientation tab on the header.
NOTE
A standoff adapter (no. 1) is needed when using the AVRONE!.
NOTE
Pin 1 on the JTAG header is at the top right corner. This is rotated 180° compared to
the other headers (J1, J2, J3, and J4).
Table 4-1. UC3 programming and debugging interface – JTAG.
Pin
JTAG (1)
1
TCK
2
GND
3
TDO
4
VCC
5
TMS
6
nSRST
7
-
8
-
9
TDI
10
GND
Note:
1. Standard pinout for JTAGICE mkII and other Atmel programming tools.
The Atmel AT32UC3B1256 can be programmed through its boot loader. The boot
loader is evoked by shorting the two holes close to the device before applying power
to the board. The two holes have 100mil spacing, so the user can solder in a two-pin
header and use a jumper to easily enter the boot loader. Programming is performed
through the boot loader programmer target in AVR32 Studio.
Alternatively, the AT32UC3B1256 can also be programmed by connecting a
programming tool, such as JTAGICE mkII, to the 10-pin test points on the bottom side
of the board (marked with BC JTAG).
NOTE
It is not recommended to program the AT32UC3B1256 using a programming tool, as
this will erase the boot loader.
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4.2 I/O expansion headers
There are four available I/O expansion headers on the kit. Because of the low pin
count on the device, the I/O expansion header pins are shared with onboard
functionality. If “clean” expansion ports are needed, cut-straps are available on some
of the ADC inputs. Otherwise, it is only needed to remove a series resistor to remove
onboard functionality. Table 4-2 show what is shared on the respective header pins.
Table 4-2. UC3-L0 Xplained I/O expansion header – J1.
Pin
J1
UC3 pin
Shared with onboard functionality
1
TWI SDA
PA21
Header J4, board controller
2
TWI SCL
PB05
Header J4, board controller
3
UART RX
PB11
Header J4
4
UART TX
PB10
Header J4
5
SPI CS1
PA08
-
6
SPI MOSI
PB03
Header J4, DataFlash®
7
SPI MISO
PB02
Header J4, DataFlash
8
SPI SCK
PB01
Header J4, DataFlash
9
GND
-
-
10
VCC_P3V3
-
-
Table 4-3. UC3-L0 Xplained I/O expansion header – J2.
Pin
J2
UC3 pin
Shared with onboard functionality
1
ADC0
(1)
PA14
RC filter output
2
ADC1 (2)
PA15
QMatrix slider X0
3
ADC2 (1)
PA16
Shorted to GND
4
ADC4
(1)
PA18
NTC
5
ADC7
PB07
-
PB08
QMatrix slider X3
PB06
-
PA19
QMatrix slider X1
6
ADC8
7
ADC6
(2)
(2)
8
ADC5
9
GND
-
-
10
VCC_ANA_P3V3
-
-
Notes:
1. ADC channels can be disconnected from onboard functions by cutting the
available cut-straps on the bottom side of the board.
2. ADC channels are shared with the QMatrix slider. Remove resistors on the lines
to separate the sensors from the ADC.
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Table 4-4. UC3-L0 Xplained I/O expansion header – J3.
Pin
J3
UC3 pin
Shared with onboard functionality
1
PWM0
PA13
RGB LED (RED), RC filter input
2
PWM1
PA17
RGB LED (GREEN)
3
PWM2
PA20
RGB LED (BLUE)
4
PWM3
PA22
QMatrix slider X2
5
PWM4
PB12
QTouch SNS
6
PWM5
PB09
QTouch SNSK
7
PWM6
PB04
LED1
PA11
LED0, mechanical button
-
-
-
-
8
PWM7
9
GND
10
(1)
VCC_P5V0
Notes:
(2)
1. Mechanical button and LED0 are sharing I/O. Use input with pull-up to turn off
LED, and output low to turn on LED.
2. The VCC pin on this header has 5V and is connected to the USB power.
Table 4-5. UC3-L0 Xplained I/O expansion header – J4.
Pin
J4
UC3 pin
Shared with onboard functionality
1
TWI SDA
PA21
Header J1, board controller
2
TWI SCL
PB05
Header J1, board controller
3
UART RX
PB11
Header J1
4
UART TX
PB10
Header J1
5
SPI CS4
PB00
-
6
SPI MOSI
PB03
Header J1, DataFlash
7
SPI MISO
PB02
Header J1, DataFlash
8
SPI SCK
PB01
Header J1, DataFlash
9
GND
-
-
10
VCC_P3V3
-
-
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5 Memories
The Atmel UC3-L0 Xplained does not have any external memories mounted on the
board. Footprints are available for adding either an industrial standard or a proprietary
Atmel DataFlash serial flash.
NOTE
The footprints share the same SPI lines, including the chip select, and so it is not
possible to mount a device on both footprints at the same time.
Table 5-1. Compatible devices for the footprints.
AT45DB
AT25DF
AT45DB64D2-CNU
AT25DF641A-SH
AT45DB321D-MWU
AT25DF321A-SH
AT45DB161D-SS
AT25DF161-SH
AT45DB081D-SS
AT25DF081-SSH
AT45DB041D-SS
AT25DF021-SSH
AT45DB021D-SS
AT45DB011D-SS
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6 Miscellaneous I/O
6.1 Mechanical switch
The board is equipped with one mechanical switch. The button is shared with LED0,
and onboard protection circuitry is added to avoid a short when driving the port high
at the same time as pushing the button, which will short it to ground. To be able to
use both button and LED, time multiplexing has to be used.
To be able to detect a button press, the firmware has to periodically set the I/O pin to
input with pull-up and check if it is low. When done fast enough, the human eye will
not see any change on the LED.
6.2 LEDs
The Atmel UC3-L0 Xplained has three LEDs mounted onboard that are connected to
the Atmel AT32UC3L064. These include two standard yellow LEDs and one RGB
LED. The two yellow LEDs are active low, while the RGB LED is active high.
LED0 is shared with the mechanical button. When turning this LED on, set the I/O pin
to output low. When turning the LED off, set the I/O pin as input with pull-up. When
the LED is turned on, the protection circuitry added to the button will make the LED
shine brighter when the button is pressed. When the LED is off, any button press will
light up the LED.
One additional dual LED is mounted near the USB connector. This is the power and
status LED, which is connected to the board controller. This LED will be green when
power is applied, and will toggle between green and orange when communication
over USB is ongoing.
6.3 Analog I/O
A RC filter and an NTC are connected to ADC0 and ADC4 respectively. These analog
references can be used as input to the ADC. Both analog references can be
disconnected by cutting the cut-straps on the bottom side of the board.
The RC filter (1st order low-pass) has an approximate 3dB cut-off frequency of 160Hz.
The input to the RC filter is one of the UC3 GPIO pins that can be configured to
output a PWM signal to the RC filter. This can be used to generate a DC voltage on
the output of the RC filter, which can be measured on the ADC. As this is a 1st order
filter, the ripple on the DC voltage is proportional to the input frequency. A higher
input frequency will give lower ripple on the output.
6.4 Touch
The UC3-L0 Xplained kit has one QTouch button and one QMatrix slider implemented
onboard. The button and the slider are connected to the built-in CAT module in the
AT32UC3L064.
The QMatrix slider can be reconfigured to be used as four separate buttons instead of
as a slider.
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Table 6-1. UC3-L0 Xplained touch connections.
Touch sensor
onboard
reference
QTouch
method
pin name
QMatrix
method
pin name
CAT
module
pin name
UC3 pin
Selection bit in
PINMODEx
register
QSlider X0
X7
CSB6
PA15
SP6
QSlider X1
X10
CSA10
PA19
SP10
QSlider X2
X11
CSB10
PA22
SP10
QSlider X3
X13
CSB12
PB08
SP12
QSlider YK0
YK3
CSB7
PA05
SP7
-
Y3
CSA7
PA04
SP7
QButton SNSK0
SNSK15
CSB15
PB09
SP15
-
SNS15
CSA15
PB12
SP15
NOTE
As the device has a very low pin count, a tradeoff has been made to be able to have
as many I/O lines as possible routed to the headers. The sensor lines to the QTouch
button and the QMatrix slider are shared with some of the headers. The sensitivity of
the sensor lines is very high on these exposed pins, and so touching the I/O pins will
give erroneous result in the touch sensing mechanism.
NOTE
Adding top modules to the board with functionality connected to these pins is not
recommended. Top modules without functionality on these pins will only add some
capacitive load and will not affect the QMatrix sensor significantly.
6.5 Board controller
The board controller and the Atmel AT32UC3L064 are connected together through
TWI and UART. Both interfaces can be used to communicate between the devices,
but only the UART is implemented by default in the board controller.
Table 6-2. AT32UC3L064 and board controller communication interface.
Interface
Atmel AT32UC3L064 pin
Atmel AT32UC3B1256 pin
UART RX
(1)
PA07
PA24
UART TX
(1)
PA06
PA23
TWI SCL
PB05
PA09
TWI SDA
PA21
PA10
Note:
10
1. These represent the RX and TX on the device. The RX on one device is
connected to TX on the other device, and visa versa.
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7 Included code example
The example application is based on the Atmel AVR Software Framework found
online at http://asf.atmel.no. The example can be found in the path
“avr32\applications\uc3-l0_xplained” in the ASF. For documentation, help, and
examples on the drivers used, please see the website.
7.1 Compiling and running
The code examples that can be found in ASF can be compiled by running make on
the makefile included in the project or by opening the project in IAR™ and compiling
the project within IAR.
8 Known Issues
8.1 Light sensor
The output range on the light sensor is 0V – 3.3V. The ADC reference must therefore
be high enough to match the output range of the light sensor when doing
measurements.
8.2 USB test points
Touching the test points for the USB data lines on the back side of the board while
there is ongoing communication might interrupt the device and cause the device to
stop responding. The kit must be reconnected to start working properly again.
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9 Revision history
Revision 4 of the Atmel UC3-L0 Xplained kit is the first revision released.
9.1 Revision 4
Revision 4 of the UC3-L0 Xplained kit can be identified by a bar-code sticker on the
back side with the following product ID: A09-1053/4.
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10 EVALUATION BOARD/KIT IMPORTANT NOTICE
This evaluation board/kit is intended for use for FURTHER ENGINEERING,
DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY. It is
not a finished product, and may not (yet) comply with some or any technical or legal
requirements that are applicable to finished products, including, without limitation,
directives regarding electromagnetic compatibility, recycling (WEEE), FCC, CE, or UL
(except as may be otherwise noted on the board/kit). Atmel supplied this board/kit
“AS IS,” without any warranties, with all faults, at the buyer’s and further users’ sole
risk. The user assumes all responsibility and liability for proper and safe handling of
the goods. Further, the user indemnifies Atmel from all claims arising from the
handling or use of the goods. Due to the open construction of the product, it is the
user’s responsibility to take any and all appropriate precautions with regard to
electrostatic discharge and any other technical or legal concerns.
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER
USER NOR ATMEL SHALL BE LIABLE TO EACH OTHER FOR ANY INDIRECT,
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
No license is granted under any patent right or other intellectual property right of
Atmel covering or relating to any machine, process, or combination in which such
Atmel products or services might be or are used.
Mailing Address: Atmel Corporation, 2325 Orchard Parkway, San Jose, CA 95131
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11 Table of Contents
Features ............................................................................................... 1
1 Introduction ...................................................................................... 1
2 Related items.................................................................................... 2
3 General information......................................................................... 2
3.1 Preprogrammed firmware.................................................................................... 3
3.2 Power supply ....................................................................................................... 4
3.3 Measuring the AT32UC3L064 power consumption ............................................ 4
3.4 Programming the AT32UC3L064 through the UART-to-USB gateway .............. 4
3.5 Communication through the UART-to-USB gateway .......................................... 4
4 Connectors ....................................................................................... 5
4.1 Programming headers......................................................................................... 5
4.2 I/O expansion headers ........................................................................................ 6
5 Memories .......................................................................................... 8
6 Miscellaneous I/O............................................................................. 9
6.1 Mechanical button switch .................................................................................... 9
6.2 LEDs.................................................................................................................... 9
6.3 Analog I/O............................................................................................................ 9
6.4 Touch................................................................................................................... 9
6.5 Board controller ................................................................................................. 10
7 Included code example ................................................................. 11
7.1 Compiling and running ...................................................................................... 11
8 Known Issues................................................................................. 11
8.1 Light sensor ....................................................................................................... 11
8.2 USB test points.................................................................................................. 11
9 Revision history ............................................................................. 12
9.1 Revision 4.......................................................................................................... 12
10 EVALUATION BOARD/KIT IMPORTANT NOTICE ...................... 13
11 Table of Contents......................................................................... 14
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Atmel Corporation
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