User Monitor Mode - User Monitor Mode - UG570

To use the Watchdog Timer to monitor user logic, set the bitstream property BITSTREAM.CONFIG.TIMER_USR, or set TIMER_USR_MON to 1 and the desired TIMER_VALUE in a write to the TIMER register in the bitstream. The user design must constantly reset the watchdog counter before it times out, either by the LTIMER command or by directly accessing the TIMER register. The watchdog is automatically disabled when the device is shut down or on power down (including shutdown).

The following table shows an example bitstream for reloading the Watchdog Timer using the LTIMER command.

The following table shows an example bitstream for directly accessing the TIMER register.