33742 datasheet(53/70 Pages) FREESCALE

53 / 70 page

Analog Integrated Circuit Device Data

Freescale Semiconductor

33742

FUNCTIONAL DEVICE OPERATION

LOGIC COMMANDS AND REGISTERS

Figure 28. Window Watchdog

Figure 29. Timeout Watchdog

Table 31. TIM1 Control Bits

WDW

WDT1

WDT0

Timing (ms typ)

Parameter

Description

9.75

Watchdog Period 1

No Window Watchdog

Watchdog Period 2

100

Watchdog Period 3

350

Watchdog Period 4

9.75

Watchdog Period 1

Watchdog Window enabled

(Window length is half the

Watchdog Timing).

Watchdog Period 2

100

Watchdog Period 3

350

Watchdog Period 4

Watchdog Timing x 50%

Watchdog Period

(Watchdog Timing Selected by TIM1 Bit WDW =1)

Window Closed

No Watchdog Clear Allowed

Window Open for Watchdog Clear

Watchdog Period

(Watchdog Timing Selected by TIM1 Bit WDW = 0)

Window Open for Watchdog Clear

Table 32. Timing Register Status Bits

Name

Logic

Failure Description

CANL2VDD

No CANL short to VDD.

CANL short to VDD.

CANL2BAT

No CANL short to VSUP.

CANL short to VSUP.

CANL2GND

No CANL short to GND.

CANL short to GND.

TXPD

No TXD dominant.

TXD dominant.

Table 33. TIM2 Timing and CANL Failure Diagnostic Register

TIM2

R/W

$101b

CSP2

CSP1

CSP0

CANL2VDD

CANL2BAT

CANL2GND

TXPD

Reset Value

–

Reset Condition (Write)(64)

–

POR, RESET

Notes

64.

See Table 13, page 47, for definitions of reset conditions.

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