29.4.7 PTG Watchdog Timer

In some applications, a Watchdog Timer (WDT) may be required as the PTG can wait indefinitely for an external event when executing the following commands:

Wait for hardware trigger positive edge or High state (PTGWHI)
Wait for hardware trigger negative edge or Low state (PTGWLO)

The WDT is enabled and it starts counting when the command starts to execute. It is disabled when the command completes execution and prior to any step delay insertion. All other commands execute with the predefined cycle counts.

Note: The PTG Watchdog Timer is not enabled during execution of the ‘PTGCTRL 0b1011’ or ‘PTGCTRL 0b1010’ command. It is assumed that correct operation of the device will be monitored through other means.