MC33388 Datasheet, PDF (10/28 Pages) Motorola, Inc – Fault Tolerant CAN Interface

MC33388
DEVICE DESCRIPTION
Table 2 • Detail Fault Operation Table
Failure #
No failure
No failure
No failure
1
2
3
4
5
6
7
8
Description
CANH wire interrupted
CANL wire interrupted
CANH short to BAT
CANL short to GND
CANH short to GND
CANL short to BAT
CANL short to CANH
CANH short to VDD
Mode
Normal and
receive only
VBAT standby
Sleep mode
Normal and
receive only
Normal and
receive only
All
All
Normal and
receive only
Normal and
receive only
All
All
State of S1, S2, S3 Internal Switches and CANL CANH Output
Drivers (Ref to Normal Mode)
S1, S2 closed, CANL, CANH drivers enabled
S3 closed, CANL, CANH drivers disabled
S3 closed, CANL, CANH drivers disabled
CANL, CANH drivers enabled, S1, S2 closed
CANL, CANH drivers enabled
S1, S2 closed
S1 open, CANH driver disabled
S2, S3 open & CANL driver disabled
CANL, CANH drivers enabled
S1, S2 closed
S2, S3 open & CANL driver disabled
S2, S3 open & CANL driver disabled
S1 open, CANH driver disabled
NOTE: S4 and S5 behaviours are only dependant upon the device operating mode.
S4 and S5 switches are closed in normal and receive only modes and are open in sleep and standby modes.
MC33388
MOTOROLA
10