Using an STM32F030F4 20-pin for a battery powered application with just a low quiescent touch tensor (active high) for wake-up from low power stand-by on low-to-high and high-to-low sensor edges.

[Ted Jackson]

I'm considering an STM32F030F4 20-pin for a battery powered application. Might a low quiescent touch sensor (output high) in conjunction with the timers/functions onboard the chip be used to wake the chip from low power stand-by on the rising and falling edges of that signal without further components? Or maybe with a BJT inverter and periodic internally timed wake-up checks to see if the signal is still on if necessary? The chip needs to perform some functions when the sensor is touched and then again when it is no longer touched. Thanks.

[KnarfB]

Have you looked at the STM32L0 series? They have special low power features and also TSSOP20 form factor.