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AT91 Datasheet(PDF) 93 Page - ATMEL Corporation

Part # AT91
Description  ARM® Thumb® Microcontrollers
PDF  153 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT91 Datasheet(HTML) 93 Page - ATMEL Corporation

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93
AT91X40 Series
1354D–ATARM–08/02
WD Enabling Sequence
To enable the Watchdog Timer the sequence is as follows:
1.
Disable the Watchdog by clearing the bit WDEN:
Write 0x2340 to WD_OMR
This step is unnecessary if the WD is already disabled (reset state).
2.
Initialize the WD Clock Mode Register:
Write 0x373C to WD_CMR
(HPCV = 15 and WDCLKS = MCK/8)
3.
Restart the timer:
Write 0xC071 to WD_CR
4.
Enable the watchdog:
Write 0x2345 to WD_OMR (interrupt enabled)



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