Atmel AVR32918 User manual

APPLICATION NOTE

Atmel AVR32918: UC3-A3 Xplained Hardware User’s

Guide

32-bit Atmel Mincrocontrollers

Features

•Atmel®AT32UC3A3256 microcontroller

•64MBit SDRAM

•Analog input (to ADC)

•Temperature sensor

•RC filter

•I/O

•One mechanical button

•Four LEDs

•Four expansion headers

•Footprints for external memory

•Atmel AT45DB series DataFlash®serial flash

•Atmel AT25DF series industry standard serial flash

•Touch

•One Atmel QTouch®slider

•One Atmel QTouch button

Introduction

The Atmel UC3-A3 Xplained evaluation kit is a hardware platform to evaluate the

Atmel AT32UC3A3256 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. UC3-A3 XPLAINED evaluation kit.

32159C

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AVR

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07/2012

Atmel AVR32918: UC3-A3 Xplained Hardware User’s Guide [APPLICATION NOTE]

32159C−AVR−07/2012

Table of Contents

1.Related items .......................................................................................3

2.General information .............................................................................3

2.1Preprogrammed firmware ................................................................................. 4

2.2Power supply..................................................................................................... 4

2.3Measuring the AT32UC3A3256 power consumption ........................................ 4

2.4Programming the kit .......................................................................................... 5

3.Connectors...........................................................................................5

3.1Programming header ........................................................................................ 5

3.2I/O expansion headers ...................................................................................... 5

4.Memories .............................................................................................7

5.Miscellaneous I/O ................................................................................7

5.1Mechanical button ............................................................................................. 7

5.2LEDs.. ............................................................................................................... 7

5.3Analog I/O ......................................................................................................... 8

5.4Touch .. ............................................................................................................. 8

6.Included code example ........................................................................8

6.1Compiling and running ...................................................................................... 8

7.Revision history

....................................................................................8

7.1Revision 10 ....................................................................................................... 9

7.1.1Known issues...................................................................................... 9

7.1.1.1Swapped TWI SCL and TWI SDA on header J4............... 9

8.EVALUATION BOARD/KIT IMPORTANT NOTICE .............................9

Atmel AVR32918: UC3-A3 Xplained Hardware User’s Guide [APPLICATION NOTE]

32159C−AVR−07/2012

1. Related items

Atmel Xplained products

Xplained is a series of small-sized and easy-to-use evaluation kits for 8- and 32-bit AVR microcontrollers. It consists of

a series of low cost MCU boards for evaluation and demonstration of feature and capabilities of different MCU families.

Atmel Studio®

Atmel Studio is a free IDE for development of C/C++ and assembler code for Atmel microcontrollers.

Atmel FLIP (Flexible In-system Programmer)

BatchISP (FLIP) is a command line tool for programming the flash and EEPROM memories of the AVR and is part of

the FLIP installation. It can be used to communicate with the preprogrammed USB DFU boot loader.

Atmel JTAGICE 3

JTAGICE 3 is a mid-range development tool for Atmel 8- and 32-bit AVR microcontrollers with on-chip debugging for

source level symbolic debugging, NanoTrace (if supported by the device) and device programming.

Atmel AVR ONE!

AVR ONE! is a professional development tool for all Atmel 8- and 32-bit AVR devices with on-chip debug capability. It is

used for source level symbolic debugging, program trace, and device programming. The AVR ONE! supports the

complete development cycle and is the fastest debugging tool offered from Atmel.

Atmel Software Framework (ASF)

The Atmel® Software Framework (ASF) is a collection of embedded software for Atmel flash MCU.

Atmel AVR32930: UC3-A3 Xplained Getting Started Guide

Atmel AVR32930: UC3-A3 Xplained Getting Started Guide source code

UC3-A3 Xplained design documentation (schematics, BOM …)

2. General information

The Atmel UC3-A3 Xplained kit is intended to demonstrate the Atmel AT32UC3A3256 microcontroller. Figure 2-1 shows

the available feature on the board.

Figure 2-1. Overview of the UC3-A3 Xplained kit.

Atmel AVR32918: UC3-A3 Xplained Hardware User’s Guide [APPLICATION NOTE]

32159C−AVR−07/2012

Figure 2-2. Functional overview of the Atmel UC3-A3 Xplained kit.

2.1 Preprogrammed firmware

The Atmel AT32UC3A3256 on the Atmel UC3-A3 Xplained kit is preprogrammed with a USB bootloader and a default

firmware. The preprogrammed firmware in the AT32UC3A3256 is a simple demonstration of the QTouch button and

QTouch slider.

2.2 Power supply

The kit needs an external power supply that can deliver 5V and up to 500mA. The actual current requirement for the

board is much less than 500mA but in order to be able to power possible expansion boards this margin is needed.

The power can be applied to the board either via the USB connector or on pin 10 on the header J3. The USB connector

is the preferred input because then it is possible to connect expansion boards on top of the J3 header.

The 5V is regulated down to 3.3V with an on board LDO regulator, which provides power to the entire board. Expansion

top boards that require 5V will get this from the header J3 pin 10.

2.3 Measuring the AT32UC3A3256 power consumption

As part of an evaluation of the AT32UC3A3256, 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 amperemeter it is possible to determine the current

consumption of the Atmel AT32UC3A3256. To locate the power measurement header, please refer to Figure 2-1.

Warning: Do not power the board without having the jumper or an amperemeter mounted. Otherwise, the device may be

damaged.

Atmel AVR32918: UC3-A3 Xplained Hardware User’s Guide [APPLICATION NOTE]

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2.4 Programming the kit

The kit can be programmed either from an external programming tool or through a USB bootloader which is pre-

programmed on the device.

The bootloader is evoked by pushing the push button (SW0) during power-on. I.e. push button and then connect an

USB cable to the kit. Programming can be performed through the DFU target (bootloader programmer target) with FLIP.

How a programmer can be connected to the kit is described in Section 3.1.

3. Connectors

The Atmel UC3-A3 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 AT32UC3A3256.

For the location of the respective headers, refer to Figure 2-1.

3.1 Programming header

The AT32UC3A3256 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 Atmel Studio), and tools

such as JTAGICE3 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 AVR ONE!.

Note: Pin 1 on the JTAG header is at the top right corner and is marked with a square pad.

Table 3-1. 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 JTAGICE3 and other Atmel programming tools.

3.2 I/O expansion headers

There are four available I/O expansion headers on the kit. Some pins have shared functionality with onboard

functionality. If “clean” expansion ports are needed, there are available cut-straps on some of the ADC inputs to remove

onboard functionality. Table 3-2 to Table 3-5 show what is shared on the header pins.

Atmel AVR32918: UC3-A3 Xplained Hardware User’s Guide [APPLICATION NOTE]

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Table 3-2. UC3 I/O expansion header – J1.

Pin J1 UC3 pin Shared with onboard functionality

1 TWI0 SDA PA25 -

2 TWI0 SCL PA26 -

3 USART3 RXD PX57 -

4 USART3 TXD PX58 -

5 SPI1 CS0 PB09 -

6 SPI1 MOSI PB10 -

7 SPI1 MISO PB08 -

8 SPI1 SCK PB07 -

9 GND - -

10 VCC_P3V3 - -

Table 3-3. UC3 I/O expansion header – J2.

Pin J2 UC3 pin Shared with onboard functionality

1 ADC0 (1)PA21 RC filter output

2 ADC1 (1)PA22 NTC

3 ADC2 PA23 -

4 ADC3 PA24 -

5 ADC4 PA20 -

6 ADC5 PA19 -

7 ADC6 PA18 -

8 ADC7 PA17 -

9 GND - -

10 VCC_ANA_P3V3 - -

Note: 1. ADC channels can be disconnected from onboard functions by cutting the available cut-straps on the

bottom side of the board.

Table 3-4. UC3 I/O expansion header – J3.

Pin J3 UC3 pin Shared with onboard functionality

1 GPIO0 PA31 -

2 GPIO1 PA30 -

3 GPIO2 PA29 -

4 GPIO3 PA28 -

5 GPIO4 PA27 -

6 GPIO5 PB00 -

7 GPIO6 PB11 -

8 GPIO7 PX19 -

9 GND - -

10 VCC_P5V0 (1)- -

Note: 1. The VCC pin on this header has 5V and is connected to the USB power.

Atmel AVR32918: UC3-A3 Xplained Hardware User’s Guide [APPLICATION NOTE]

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Table 3-5. UC3 I/O expansion header – J4.

Pin J4 UC3 pin Shared with onboard functionality

1 TWI1 SCL (1)PA14/PA15 USART1 RTS

2 TWI1 SDA (1)PA15/PA12 USART1 CTS

3 USART1 RXD PA05 -

4 USART1 TXD PA06 -

5 SPI0 CS3 PA07 -

6 SPI0 MOSI PA10 Serial flash/DataFlash

7 SPI0 MISO PA11 Serial flash/DataFlash

8 SPI0 SCK PA08 Serial flash/DataFlash

9 GND - -

10 VCC_P3V3 - -

Note: 1. See known issues Section 7.1.1.1 Swapped TWI SCL and TWI SDA on header J4.

4. Memories

The Atmel UC3-A3 Xplained has an external SDRAM memory mounted on the board. There are also footprints

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 4-1. Compatible devices for the footprints.

Atmel AT45DB Atmel 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

5. Miscellaneous I/O

5.1 Mechanical button

The board is equipped with one mechanical button. Because the button is used to enter bootloader mode it has a pull-

up mounted, this means it is not necessary to use the pull-up in the UC3 to detect the status of the button.

5.2 LEDs

The Atmel UC3-A3 Xplained has four yellow LEDs which are connected to the Atmel AT32UC3A3256 and all of them

are active low.

Atmel AVR32918: UC3-A3 Xplained Hardware User’s Guide [APPLICATION NOTE]

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One dual LED is mounted near the USB connector. It has one green LED which is used to indicate power and one red

LED that can be used for other purposes. The green LED will be active when power is applied to the board but it can be

disabled by software from the AT32UC3A3256 device if needed. The red LED is active low and the green LED is active

high.

5.3 Analog I/O

A RC filter and a NTC temperature sensor are connected to ADC0 and ADC1 respectively. These analog sensors are

used as input to the ADC but it is also possible to disconnect them by cutting the cut-straps on the bottom side of the

board.

The RC filter (1. order low-pass) has an approximate 3dB cut-off frequency of 159Hz. 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 1. 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.

5.4 Touch

The UC3-A3 Xplained kit has one QTouch button and one QTouch slider; both are connected to GPIO pins on the

AT32UC3A3256.

Table 5-1. UC3 touch connections.

Touch sensor onbard reference QTouch method pin name UC3 GPIO pin

CH1 SNSK1 98

CH1 SNS1 99

CH2 SNSK2 100

CH2 SNS2 101

CH3 SNSK3 102

CH3 SNS3 103

CH4 SNSK4 104

CH4 SNS4 105

6. Included code example

The example application is based on the Atmel Software Framework (ASF) found online at http://asf.atmel.com. For

documentation, help and examples on the drivers used, please take a look at the website. The Atmel Software

Framework is also included in Atmel Studio.

6.1 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 up the project in IAR™ and compiling the project within IAR.

7. Revision history

To identify the revision of the Atmel UC3-A3 Xplained kit, locate the bar-code sticker on the back side of the board. The

first line on the sticker shows the product ID and the revision. For example “A09-1053/10” can be resolved to ID=A09-

1053 and revision=10.

Atmel AVR32918: UC3-A3 Xplained Hardware User’s Guide [APPLICATION NOTE]

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7.1 Revision 10

Revision 10 of the UC3-A3 Xplained kit is the initially released version. This revision of the kit has the following product

ID: A09-1053/10.

7.1.1 Known issues

7.1.1.1 Swapped TWI SCL and TWI SDA on header J4

The TWI lines that are connected to the pins one and two on the header J4 are swapped. Therefore the silkscreen on

the board is not correct because TWI SCL function is on pin one instead of pin two and TWI SDA function is on pin two

instead of pin one.

8. 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

Atmel Corporation

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Tel: (+1)(408) 441-0311

Fax: (+1)(408) 487-2600

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