On: A generic VHDL touch controller – add capacitive b...

[RicoElectrico]

I was about to link Atmel QTouch, they do the same thing with plain vanilla GPIO, but annoyingly do not provide the exact sequence of operations as ST presentation does. But they seem to be equivalent.

This chip on the diagram is ATTiny in disguise - just rearrange the cap and no special hardware needed: https://eu.mouser.com/new/microchip/atmel_qtouch/

[kurthr → RicoElectrico]

Just to clarify, Atmel acquired the company and expired IP that I cited above. They may continue to use it in some portion of their IC portfolio.