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33742 Datasheet(PDF) 41 Page - Freescale Semiconductor, Inc

Part # 33742
Description  System Basis Chip (SBC) with Enhanced High-Speed CAN Transceiver
PDF  65 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

33742 Datasheet(HTML) 41 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
Freescale Semiconductor
41
33742
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
DEVICE FAULT OPERATION
Table 12
describes the relationship between device fault or warning and the operation of the VDD, V2, CAN, and HS interface.
Table 12. Fault/Warning
Fault/Warning
VDD
V2
CAN
HS
Battery Fail
Turn OFF
Turn OFF
Turn OFF due to V2.
No communication
OFF
VDD Temperature
Pre-Warning
Warning flag only.
Leave as is
No change
No change
No change
VDD Overtemperature
Turn OFF
Turn OFF
Turn OFF due to V2.
No communication
OFF
VDD Overcurrent
VDD regulator enters linear
mode. VDD undervoltage
reset may occurs. VDD
overtemperature Pre-
Warning or shutdown may
occur
Turn OFF if VDD
undervoltage reset occurs
If V2 is OFF, turn OFF
and no communication
Turn OFF if VDD
undervoltage reset occurs
VDD Short Circuit
VDD undervoltage reset
occurs. VDD
overtemperature Pre-
Warning or shutdown may
occur
Turn OFF
Turn OFF due to V2.
No communication
OFF
Watchdog Reset
ON
Turn OFF
Turn OFF due to V2.
No communication
OFF
V2LOW (e.g., V2 < 4.0 V)
No change
V2 out of range
Turn OFF due to V2 low
No change
HS Overtemperature
No change
No change
No change
OFF
HS Overcurrent
No change
No change
No change
HS overtemperature
may occur
VSUP LOW
No change
No change
No change
No change
CAN Overtemperature
No change
No change
Disable. As soon as
temperature falls, CAN is
re-enabled automatically
No change
CAN Overcurrent
No change
No change
(46)
No change
CANH Short to GND
No change
No change (47)
No communication (48)
No change
CANH Short to VDD
No change
No change
Communication OK
No change
CANH Short to VSUP
No change
No change
Communication OK
No change
CANL Short to GND
No change
No change
Communication OK
No change
CANL Short to VDD
No change
No change
No communication (48)
No change
CANL Short to VSUP
No change
No change
No communication (48)
No change
Notes
46.
Refer to descriptions of CANH and CANL short to GND, VDD, and VSUP elsewhere in table.
47.
Peak current 150 mA during TXD dominant only. Due to loss of communication, CAN controller reaches bus OFF state. Average current
out of V2 is below 10 mA.
48.
Overcurrent might be detected. THERM-CUR bit set in CAN register.



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