In the TPL5010 datasheet it says:
"The DONE pin is driven by a µC to signal successful processing of the WAKE signal. The TPL5010 recognizes a
valid DONE signal as a low to high transition; if two or more DONE signals are received within the time interval,
only the first DONE signal is processed."
Can't we use a pulse frequency on the DONE line that is at least twice the frequency of the WAKE signal and thus make sure we extinguish the RESET signal always without the need to read the WAKE signal? This way, by ignoring the WAKE signal, the TPL5010 can be used with only one GPIO from the uC. This is especially helpful if the TPL5010 is not needed to wake the device up, but only as a watchdog timer.
I know this is not the intended design but the idea seems quite valid, especially that we have not found any watchdogs from TI with only DONE signal.
Best,
Nizar
