To start and stop a watchdog timer, access must be made through the WSPR using a specific sequence.
To disable the timer, follow this sequence:
- Write 0xXXXX AAAA in the WSPR.
- Write 0xXXXX 5555 in the WSPR.
To enable the timer, follow this sequence:
- Write 0xXXXX BBBB in the WSPR.
- Write 0xXXXX 4444 in the WSPR.
All other write sequences on the WSPR have no effect on the start/stop feature of the module.