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CAN BUS Bit Rate selection
The Bit Rate can be selected by configuring the 3 dip switches in SW1. The program fetches the switch
positions once after a power up.
Bit Rate Selection
Mode Selection
SW2
OPT1 switch (Receiver data frame compare)
Receiver Modes:
If OPT1 is in the open position the receiver mode will check the data frame for an incrementing 32-bit
value. If the data doesn't match the expected value from the previous transmission it will turn on the
Red LED8 and halt.
Transmitter Modes:
If OPT1 is in the open position a 400us delay will be inserted between each transmission.
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S3
S2
S1
BIT RATE
0
0
0
1 MBPS
0
0
1
500 KBPS
0
1
0
250 KBPS
0
1
1
125 KBPS
1
0
0
83.3 KBPS
MODE 2 MODE 1 MODE 0
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
AN-175
MODE
Board Test
Transmit Standard Frames
Receive in polling mode
Monitor
Loop Back
Transmit Extended Frames
Receive in interrupt mode
Serial Console Commands
Holt Integrated Circuits
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