33902 Datasheet, PDF(25/31 Page) Freescale Semiconductor, Inc – High Speed CAN Interface with Embedded 5.0 V Supply

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33902 Datasheet, PDF (25/31 Pages) Freescale Semiconductor, Inc – High Speed CAN Interface with Embedded 5.0 V Supply

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FUNCTIONAL DEVICE OPERATION

OPERATIONAL MODES

Description

RXD short to high (recessive level)

Set

In Normal and Listen Only modes, if the RXD permanent recessive condition is detected

RX-PR

Reset

Entering low power mode, the RXD recovery condition reached + P_SPI reading (Listen Only and Normal

mode)

Action

Set the local failure flag, disable the CAN driver, set ERR low in Listen Only mode coming from Normal

mode

Description

TXD permanent dominant

Set

In NORMAL modes, if TXD permanent dominant condition detected

TX-PD

Reset

Entering low power mode, TXD recovery condition reached + P_SPI reading (Listen Only and Normal

mode)

Action

Set the local failure flag, disable the CAN driver, set ERR low in Listen Only mode coming from Normal

mode

Description

CANF (2,1,0)

Set

0 0 0: No CAN bus failure

0 0 1:CANL short to GND

0 1 0: CANL short to VDD

0 1 1: CANL short to VBAT

1 0 1: CANH short to GND

1 1 0: CANH short to VDD

1 1 1: CANH short to VSUP

In Normal modes, if CAN failure condition detected

Reset

Entering low power mode, CAN failure recovery condition reached + P_SPI reading (Listen Only and

Normal mode)

Action

Set the bus failure flag, set the ERR low in Normal mode after 4 Tx pulses

VDD temp

Description

Set

Reset

VDD regulator reaches temperature prewarning

In Normal mode or Listen Only mode, if the VDD temperature reaches the prewarning threshold

Real time report, reset if the temperature falls below the prewarning threshold

Action

By default no action. If the ERR-EXT bit is set, ERR is set low.

VSOV

Description

VSUP over-voltage detected

Set

In Normal and Listen Only modes, if the VSUP over-voltage threshold condition detected

Reset

Entering low power mode, VSUP over-voltage threshold condition recovered + P_SPI reading (Listen Only

and Normal mode)

Action

By default no action. If the ERR-EXT bit is set, the ERR is set low.

Analog Integrated Circuit Device Data

Freescale Semiconductor

33902

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