AVR-CAN User Manual

AVR-CAN User Manual

AVR-CAN development board

Users Manual

Rev.A, January 2010

Copyright(c) 2011, OLIMEX Ltd, All rights reserved

Page 1

INTRODUCTION:

AVR-CAN is inexpensive way to learn AT90CAN128 microcontroller from Atmel.

It's in very compact form 60x55mm and the presence of both CAN and RS232 allows the customer to make a bridge between UART and CAN networks. All AVR pins are available on extension connectors and the board can be easily a snap-on prototype or other mother board where additional circuits are built.

BOARD FEATURES:

MCU: AT90CAN128 – 128Kb Flash, 4Kb EEPROM, 4Kb SRAM, 52 GPIO, 32 working registers, a CAN controller, Real Time Clock, four Timer/Counters with PWM, 2 UARTs, Two-wire Serial Interface, an 8-channel 10-bit ADC,

Watchdog Timer, SPI serial port, JTAG interface, five selectable power saving modes

5x2 pin JTAG connector for programming and debugging with AVR-JTAG-L or

AVR-JTAG-USB

RS232 DB9 female connector and driver

CAN controller and interface

− User button

Status LED

16 MHz oscillator circuit

− 32768 Hz oscillator circuit

Reset button and circuit

On board voltage regulator (+5V)

− Power supply LED

Power supply connector

Extension pin headers for every uC pin

− FR-4, 1.5 mm (0.062''), soldermask, white silkscreen component print

Dimension 60x50 mm (2.36x1.96'')

ELECTROSTATIC WARNING:

The AVR-CAN board is shipped in protective anti-static packaging. The board must not be subject to high electrostatic potentials. General practice for working with static sensitive devices should be applied when working with this board.

BOARD USE REQUIREMENTS:

Cables:

RS232 cable in case you want to use the RS232 and/or CAN interface.

You might need other cables depending on the programming/debugging tool you use.

Hardware:

Programmer/Debugger – AVR-JTAG-L or AVR-JTAG-USB or other compatible programming/debugging tool.

Software: AVR Studio 4.13

(or later) + WinAVR (latest version) or IAR AVR.

AVR Studio and WinAVR are free to download and use. Take a note that AVR Studio 4.13 has a bug and doesn't read the fuses correctly.

On our request to Atmel support they had confirmed the bug and

Page 2

had suggested to fix the bug by “AVR Studio 4.13 SP2 JTAGICE Fix” available from http://www.atmel.no/beta_ware/

PROCESSOR FEATURES:

AVR-CAN

board use MCU AT90CAN128 from Atmel with these features:

High-performance, Low-power AVR® 8-bit Microcontroller

Advanced RISC Architecture

-

133 Powerful Instructions – Most Single Clock Cycle Execution

-

32 x 8 General Purpose Working Registers + Peripheral Control

Registers

-

Fully Static Operation

-

Up to 16 MIPS Throughput at 16 MHz

-

On-chip 2-cycle Multiplier

 Non volatile Program and Data Memories

-

128K Bytes of In-System Reprogrammable Flash o

Endurance: 10,000 Write/Erase Cycles

-

Optional Boot Code Section with Independent Lock Bits o

Selectable Boot Size: 1K Bytes, 2K Bytes, 4K Bytes or 8K Bytes o

In-System Programming by On-Chip Boot Program (CAN,

UART, ...) o

True Read-While-Write Operation

-

4K Bytes EEPROM (Endurance: 100,000 Write/Erase Cycles)

-

4K Bytes Internal SRAM (AT90CAN32/64/128)

-

Up to 64K Bytes Optional External Memory Space

-

Programming Lock for Software Security

 JTAG (IEEE std. 1149.1 Compliant) Interface

-

Boundary-scan Capabilities According to the JTAG Standard

-

Programming Flash (Hardware ISP), EEPROM, Lock & Fuse Bits

-

Extensive On-chip Debug Support

CAN Controller 2.0A & 2.0B - ISO 16845 Certified

-

15 Full Message Objects with Separate Identifier Tags and Masks

-

Transmit, Receive, Automatic Reply and Frame Buffer Receive Modes

-

1Mbits/s Maximum Transfer Rate at 8 MHz

-

Time stamping, TTC & Listening Mode (Spying or Autobaud)

Peripheral Features

-

Programmable Watchdog Timer with On-chip Oscillator

-

8-bit Synchronous Timer/Counter-0 o

10-bit Prescaler o

External Event Counter o

Output Compare or 8-bit PWM Output

-

8-bit Asynchronous Timer/Counter-2 o

10-bit Prescaler o

External Event Counter o

Output Compare or 8-Bit PWM Output o

32Khz Oscillator for RTC Operation

-

Dual 16-bit Synchronous Timer/Counters-1 & 3 o

10-bit Prescaler o

Input Capture with Noise Canceler o

External Event Counter o

3-Output Compare or 16-Bit PWM Output

Page 3

o

Output Compare Modulation

-

8-channel, 10-bit SAR ADC o

8 Single-ended Channels o

7 Differential Channels o

2 Differential Channels With Programmable Gain at 1x, 10x, or

200x

-

On-chip Analog Comparator

-

Byte-oriented Two-wire Serial Interface

-

Dual Programmable Serial USART

-

Master/Slave SPI Serial Interface o

Programming Flash (Hardware ISP)

Special Microcontroller Features

Power-on Reset and Programmable Brown-out Detection

-

Internal Calibrated RC Oscillator

-

8 External Interrupt Sources

-

5 Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down

& Standby

-

Software Selectable Clock Frequency

-

Global Pull-up Disable

I/O and Packages

-

53 Programmable I/O Lines

-

64-lead TQFP and 64-lead QFN

Operating Voltages: 2.7 - 5.5V

Operating temperature: Industrial (-40°C to +85°C)

Maximum Frequency: 8 MHz at 2.7V, 16 MHz at 4.5V

Page 4

BLOCK DIAGRAM:

MEMORY MAP:

Page 5

Page 6

SCHEMATIC:

+

100nF

47uF/6.3VDC

220uF/25V

C17

NC

R13

2 1

21

52

Page 7

2

1

+5V

3

53

22

BOARD LAYOUT:

POWER SUPPLY CIRCUIT:

Power should be applied to CON2PV2-2.5MM connector. AVR-CAN could be powered by applying up to 12VDC (7 to 12 VDC) to EXT1-1 and EXT1-2 and GND to EXT1-3 and EXT1-4 or if you supply 7 to 12 VDC to CON2PV2-2.5MM pin 2

(VIN) and GND to CON2PV2-2.5MM pin 1 .

The consumption of AVR-CAN is about 40-50 mA.

RESET CIRCUIT:

AVR-CAN

reset circuit is made with R6 (10k) pull-up and button RST. On the board there is a place for the voltage supervisory device MCP120-T, but we sell it without MCP120-T.

Page 8

CLOCK CIRCUIT:

Quartz crystal 16 MHz is connected to AT90CAN128 pin 24 (XTAL1) and pin 23

(XTAL2).

Quartz crystal 32.768 kHz is connected to AT90CAN128 pin 19 (TOSC1/PG4) and pin 18 (TOSC2/PG3) and supplies the internal Asynchronous Timer/Counter

(Timer/Counter2 in asynchronous operation).

JUMPER DESCRIPTION:

CAN_D

CAN Disable.

If this jumper is closed, the CAN is disabled.

Default state is open.

CAN_T

This jumper assures correct work of the CAN. At each end of the bus it should be closed. This means that if you have only two devices with CAN, the jumpers of both devices should be closed. If you have more than two devices, only the two end-devices should be closed.

Default state is closed.

AVREF_E

This jumper when closed supplies VDDA reference to the AVREF. If this jumper is open the desired reference voltage should be applied at

EXT2-3.

Default state is open.

INPUT/OUTPUT:

Status LED (red)

with name STAT connected to AT90CAN128 pin 6

(OC3B/INT4/PE4).

Power-on LED (red)

with name PWR_LED – this LED shows that +5V is applied to the board.

User button

with name BUT connected to AT90CAN128 pin 7 (OC3C/INT5/PE5).

Reset button

with name RST connected to AT90CAN128 pin 20 (#RESET).

Page 9

EXTERNAL CONNECTORS DESCRIPTION:

JTAG:

8

9

6

7

10

3

4

1

2

5

Pin #

RESET

+5V

NC

TDI

GND

Signal Name

TCK

GND

TDO

+5V

TMS

TDI

Input Test Data In. This is the serial data input for the shift register.

TDO

Output Test Data Out. This is the serial data output for the shift register. Data is shifted out of the device on the negative edge of the TCK signal.

TMS

Input Test Mode Select. The TMS pin selects the next state in the TAP state machine.

TCK

Input Test Clock. This allows shifting of the data in, on the TMS and TDI pins. It is a positive edge triggered clock with the TMS and TCK signals that define the internal state of the device.

JTAG is used to to program and debug the MCU.

PWR:

1

2

Pin # Signal Name

GND

VIN

VIN

(Voltage In) – you should supply +7 to + 12 VDC.

RS232:

Page 10

5

6

3

4

1

2

Pin #

7

8

9

NC

TXD0

Signal Name

RXD0

NC (not connected through R14 to pin 6)

GND

NC (not connected through R14 to pin 4)

NC (not connected through R13 to pin 8)

NC (not connected through R13 to pin 7)

NC

TXD0

Output Transmit Data. This is the asynchronous serial data output (RS232) for the shift register on the UART controller.

RXD0

Input Receive Data. This is the asynchronous serial data input (RS232) for the shift register on the UART controller.

Page 11

CAN:

8

9

6

7

3

4

1

2

5

Pin # Signal Name

NC

CANL

GND

NC

NC

GND

CANH

NC

VIN

CANL and CANH are either deferential input, or differential output depending on the function of the MCP2551 CAN controller (receiving or transmitting data).

Page 12

EXT1:

EXT2:

25

27

21

23

17

19

13

15

29

31

33

7

9

11

1

3

5

Pin # Signal Name

VIN

GND

+5V

-

T3/INT6/PE6

OC3B/INT4/PE4

XCK0/AIN0/PE2

RXD0/PDI/PE0

ADC1/PF1

ADC3/PF3

ADC5/TMS/PF5

ADC7/TDI/PF7

PA1/AD1

PA3/AD3

PA5/AD5

PA7/AD7

PG1/#RD

26

28

22

24

18

20

14

16

30

32

34

8

10

12

2

4

6

Pin #

VIN

Signal Name

GND

+5V

ICP3/INT7/PE7

OC3C/INT5/PE5

OC3A/AIN1/PE3

TXD0/PDO/PE1

ADC0/PF0

ADC2/PF2

ADC4/TCK/PF4

ADC6/TDO/PF6

PA0/AD0

PA2/AD2

PA4/AD4

PA6/AD6

PG2/ALE

PG0/#WR

Page 13

27

29

23

25

31

33

17

19

13

15

21

9

11

5

7

1

3

Pin # Signal Name

VDDA

AVREF

AGND

GND

TXD1_OUT

PC7/A15/CLK0

PC5/A13

PC3/A11

PC1/A9

T0/PD7

TXCAN/XCK1/P5 22

14

16

18

20

TXD1/INT3/PD3

SDA/INT1/PD1

PB7/OC0A/OC1C 28

PB5/OC1A 30

24

26

PB3/MISO

PB1/SCK

32

34

10

12

6

8

2

4

Pin # Signal Name

VDDA

AGND

+5V

GND

RXD1_IN

PC6/A14

PC4/A12

PC2/A10

PC0/A8

RXCAN/T1/PD6

ICP1/PD4

RXD1/INT2/PD2

SCL/INT0/PD0

PB6/OC1B

PB4/OC2A

PB2/MOSI

PB0/#SS

Page 14

MECHANICAL DIMENSIONS:

Page 15

AVAILABLE DEMO SOFTWARE :

You could download AVR-CAN software form

www.olimex.com/dev

:

AVR-CAN Blinking LED demo code (C source and HEX)

AVR-CAN Button read demo code (C source and HEX)

AVR-CAN RS232 demo code (C source and HEX)

ORDER CODE:

AVR-CAN

– assembled and tested (no kit, no soldering required)

How to order?

You can order to us directly or by any of our distributors.

Check our web

www.olimex.com/dev

for more info.

All boards produced by Olimex are RoHS compliant

Revision history:

Board REV.A

Users Manual – Rev. A

- created

- created added latest revision of the scheme changed supply voltage

January 2010

February 2011 add page numbers added more detailed mechanical dimensions

Page 16

Disclaimer:

© 2011 Olimex Ltd. All rights reserved. Olimex®, logo and combinations thereof, are registered trademarks of Olimex Ltd. Other terms and product names may be trademarks of others.

The information in this document is provided in connection with Olimex products. No license, express or implied or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Olimex products.

Neither the whole nor any part of the information contained in or the product described in this document may be adapted or reproduced in any material from except with the prior written permission of the copyright holder.

The product described in this document is subject to continuous development and improvements. All particulars of the product and its use contained in this document are given by OLIMEX in good faith.

However all warranties implied or expressed including but not limited to implied warranties of merchantability or fitness for purpose are excluded.

This document is intended only to assist the reader in the use of the product. OLIMEX Ltd. shall not be liable for any loss or damage arising from the use of any information in this document or any error or omission in such information or any incorrect use of the product.

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