Expanding on 32u4-CAN board, the AT90CAN carries same functions but
replacing processor with AT90CAN series. The CAN controller chip(s) is
removed as its function is in the processor. Tranceiver SMD foot print had
been supplemented with DIP layout and can be used as either one.
The board is larger due to the extra IO pins available on the larger
processor. Therefore header pins had been expanded and are closer to the
Arduino Mega format.
Features of the AT90CAN board
o
Larger
AT90CAN processor
o
34 additional IO pins
o Arduino UNO
expansion headers for stacking of other expansion modules
o Mini SD socket
for local logs, no need to computer
o
CAN controllers onboard microcontroller
o SD selectable via 4 different chip select pins
o Groove (2mm) headers for I2C and UART connections simplifies connections to other devices
o
On board 5v 1A
and 3.3v 1A power regulator
o
CAN v2.0B up to 1Mb/s data rates
o
Standard
DB9 OBD connector
o
LED indicators
o
Power
o
Tx, Rx
o On board
LED (D13)
o
Board size 130mm x 66mm (5.1in x2.2in)
o
Compatible
with 32u4-CAN or larger AT90CAN prototype boards
OBDII cables
There are numerous different pinouts for the DB9 to OBDII cable.
We had made the DB9 pinout follow most common wiring for OBDII cables currently
being sold. However we
strongly encourage that you check your cable to match the wiring matches the
board.
To make your own cable please follow the below pinout.
Signal Description | OBDII | DB9 (female) |
J1850 BUS+ | 2 | 7 |
Chassis Ground | 4 | 2 |
Signal Ground | 5 | 1 |
CAN High J-2284 | 6 | 3 |
ISO 9141-2 K Line | 7 | 4 |
J1850 BUS- | 10 | 6 |
CAN Low J-2284 | 14 | 5 |
ISO 9141-2 L Line | 15 | 8 |
Battery Power | 16 | 9 |
Board documents:
Schematic
PCB layout files
Gerber Files
AMS1117
AT90CAN datasheet
MCP2551 Datasheet
LM358
CH340
OBD-II Parameters ID's
Bill of Materials
Assembly / board manual
Arduino MCP2515 CAN-BUS library
DB9 to OBD-II breakout (option)
The break-out board provides terminal connections to individual pins through a
DB9(female) connector. As the board does not have any active components
as is generic and can be used in other application. Follow the <link>
for files
Prototype board:
The board is
compatible with the smaller from the 32u4 board or the
new larger prototype boards
NOTE:
* Copy right and trademarks of their respective owners / manufacturers