AVR-CAN [ETC]
AT90CAN128 RS232CAN BRIDGE;
ETC 
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:
Software:
Programmer/Debugger – AVR-JTAG-L or AVR-JTAG-USB or other
compatible programming/debugging tool.
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
Endurance: 10,000 Write/Erase Cycles
Optional Boot Code Section with Independent Lock Bits
o
o
o
Selectable Boot Size: 1K Bytes, 2K Bytes, 4K Bytes or 8K Bytes
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
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-
-
-
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
o
o
10-bit Prescaler
External Event Counter
Output Compare or 8-bit PWM Output
-
-
8-bit Asynchronous Timer/Counter-2
o
o
o
o
10-bit Prescaler
External Event Counter
Output Compare or 8-Bit PWM Output
32Khz Oscillator for RTC Operation
Dual 16-bit Synchronous Timer/Counters-1 & 3
o
o
o
o
10-bit Prescaler
Input Capture with Noise Canceler
External Event Counter
3-Output Compare or 16-Bit PWM Output
Page 3
o
Output Compare Modulation
-
8-channel, 10-bit SAR ADC
o
o
o
8 Single-ended Channels
7 Differential Channels
2 Differential Channels With Programmable Gain at 1x, 10x, or
200x
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-
-
-
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
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-
Software Selectable Clock Frequency
Global Pull-up Disable
I/O and Packages
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-
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
+
3
220uF/25V
C17
2
1
+5V
R13
NC
21
52
53
22
2
1
Page 7
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:
Pin #
Signal Name
TCK
1
2
3
4
5
6
7
8
9
10
GND
TDO
+5V
TMS
RESET
+5V
NC
TDI
GND
TDI
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.
Input Test Data In. This is the serial data input for the shift register.
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:
Pin #
Signal Name
GND
VIN
1
2
VIN (Voltage In) – you should supply +7 to + 12 VDC.
RS232:
Page 10
Pin #
Signal Name
1
2
3
4
NC
TXD0
RXD0
NC (not connected
through R14 to pin 6)
5
6
GND
NC (not connected
through R14 to pin 4)
7
8
9
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:
Pin #
Signal Name
1
2
3
4
5
6
7
8
9
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:
Pin #
Signal Name
VIN
Pin #
Signal Name
VIN
1
2
3
GND
4
GND
5
+5V
6
+5V
7
-
8
ICP3/INT7/PE7
OC3C/INT5/PE5
OC3A/AIN1/PE3
TXD0/PDO/PE1
ADC0/PF0
ADC2/PF2
ADC4/TCK/PF4
ADC6/TDO/PF6
PA0/AD0
9
T3/INT6/PE6
OC3B/INT4/PE4
XCK0/AIN0/PE2
RXD0/PDI/PE0
ADC1/PF1
ADC3/PF3
ADC5/TMS/PF5
ADC7/TDI/PF7
PA1/AD1
10
12
14
16
18
20
22
24
26
28
30
32
34
11
13
15
17
19
21
23
25
27
29
31
33
PA2/AD2
PA3/AD3
PA4/AD4
PA5/AD5
PA6/AD6
PA7/AD7
PG2/ALE
PG1/#RD
PG0/#WR
EXT2:
Page 13
Pin #
Signal Name
VDDA
Pin #
Signal Name
VDDA
1
2
3
AVREF
4
AGND
5
AGND
6
+5V
7
GND
8
GND
9
TXD1_OUT
PC7/A15/CLK0
PC5/A13
10
12
14
16
18
20
22
24
26
28
30
32
34
RXD1_IN
PC6/A14
11
13
15
17
19
21
23
25
27
29
31
33
PC4/A12
PC3/A11
PC2/A10
PC1/A9
PC0/A8
T0/PD7
RXCAN/T1/PD6
ICP1/PD4
RXD1/INT2/PD2
SCL/INT0/PD0
PB6/OC1B
PB4/OC2A
PB2/MOSI
PB0/#SS
TXCAN/XCK1/P5
TXD1/INT3/PD3
SDA/INT1/PD1
PB7/OC0A/OC1C
PB5/OC1A
PB3/MISO
PB1/SCK
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
January 2010
February 2011
–
–
–
–
added latest revision of the scheme
changed supply voltage
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.
Page 17
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