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CANBUS Speed and Length
Table 7-1 shows the relationship between the bit rate and cable length.
Table 5-1. Bit Rates for Different Cable Lengths
Bit Rate Cable Length
10 KB/s 6.7 km
20 KB/s 3.3 km
50 KB/s 1.3 km
125 KB/s 530 m
250 KB/s 270 m
500 KB/s 130 m
1 MB/s 40 m
Features
Three programmable acceptance filters
− Message filter covers: ID, IDE, RTR, 16 DATA bits
− Each filter has its own enable flag
Transmit Path
− Three Tx message holding registers with internal priority arbiter
− Message abort command
Receive FIFO
− Four message deep receive FIFO
− FIFO status indicator
Bus coupler
− Intel style interface module
− Full synchronous zero wait-states interface
− Status and configuration interface
Programmable Interrupt Controller
Listen only mode
CANbus analysis functions
− Arbitration lost capture
− Error event capture
− Actual frame reference pointer
Programmable CANbus physical layer interface