Hello,
I am planning to use the UCC2946 for a purpose slightly different than its intended use. I intend to use it as a fail-safe to disable a laser if the WDI pin has not been toggled for a certain amount of time. The watchdog function is perfect for our needs. However, according to the datasheet the watchdog timer is also reset if RES is asserted, independent of the watchdog timer, therefore enabling the laser device during power on and power fluctuations. Is there any way to keep RES from ever being asserted? I have no need for the voltage supervisor function. (There is brown-out detection elsewhere in the circuit)
Alternatively, am I correct to assume that if I AND together WDO and RES and set the reset period to be longer than the watchdog timeout period the output would never be high unless WDI is being toggled?