33889 Datasheet, PDF (45/60 Pages) Freescale Semiconductor, Inc – System Basis Chip with Low Speed Fault Tolerant CAN Interface

FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
Table 17. Status bits
CS3
CS2
CS1
CS0
Bus failure #
Description
0
0
0
0
no failure
0
0
0
1
1
CANH open wire
0
1
0
1
5
CANH short circuit to
ground
0
1
1
0
8, 3a
VDD
0
1
1
1
3
VBAT
1
0
0
1
2
CANL open wire
1
1
0
1
4, 7
CANL short circuit to
ground / CANH
1
1
1
0
9
VDD
1
1
1
1
6
VBAT
Comments:
CS2 bit at 0 = open failure. CS2 bit at 1 = short failure.
(CS3 bit at 0 and (CS1 = 1 or CS2 =1)) = CANH failure. CS3 bit at 1 = CANL failure.
CS1 and CS0 bits: short type failure coding (gnd, VDD or VBAT).
In case of multiple failures, the last failure is reported.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33889
45