MM912F634CV2AP datasheet(78/335 Pages) FREESCALE

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Functional Description and Application Information

Window Watchdog

MM912F634

Freescale Semiconductor

4.9.1

4.9.1.1

Watchdog Register (WDR)

4.9.1.2

Watchdog Service Register (WDSR)

Table 91. Watchdog Register (WDR)

Offset(71) 0x10

Access: User read/write

543

210

WDOFF

WDWO

WDTO

Reset

000

Note:

71. Offset related to 0x0200 for blocking access and 0x300 for non blocking access within the global address space.

Table 92. WDR - Register Field Descriptions

Field

Description

7 - WDOFF

watchdog Off - Indicating the Watchdog module is being disabled externally.

6 - WDWO

Watchdog Window Open - Indicating the Watchdog Window is currently open for counter reset.

2-0

WDTO[2:0]

Watchdog Timeout Configuration - configuring the Watchdog timeout duration tWDTO.

000 - 10 ms

001 - 20 ms

010 - 40 ms

011 - 80 ms

100 - 160 ms

101 - 320 ms

110 - 640 ms

111 - 1280 ms

Table 93. Watchdog Service Register (WDSR)

Offset(72) 0x11

Access: User read/write

543

210

WDSR

Reset

101

Note:

72. Offset related to 0x0200 for blocking access and 0x300 for non blocking access within the global address space.

Table 94. WDSR - Register Field Descriptions

Field

Description

7-0

WDSR

Watchdog Service Register - Writing this register with the correct value (0xAA alternating 0x55) while the window is open

will reset the watchdog counter. Writing the register while the watchdog is disabled will have no effect.

MM912F634CV2AP Datasheet(PDF) 78 Page - Freescale Semiconductor, Inc

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