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STM32L151. 3 buttons "Touch sensing" and minimum power consumption.

Question asked by Sakhno.Roman on Mar 5, 2015
Dear friends, please help.

I make a touch switch on the 3 buttons. I use microcontroller STM32L151 and its hardware "touch sensing".

The challenge is to "touch switch" with CR2032 battery (225mAh) worked for several years. Average consumption should fall less than 10 microamps.

Tell me please, what is the minimum time to poll the key-touch enough?
It need for wake up the microcontroller on the minimum amount of time.


Sincerely, Roman.

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