I am working on a project with a STM32L462CEU6 powered by battery. In this project we are also using TSC. Now I want STM32 to go in sleep or shutdown mode and wakeup when a touch pad has been touched. So the goal is that TSC measures in background and when a certain threshold has been reached it fires a "wakeup interrupt". Is that even possible? I only found information about intterupts "acquisition completed" or "maxcount reached".
I already searched for this use case but I failed to find useful information. Perhaps, someone can help me with some hints or sites where I can find more information.
Thanks in advance.
Sebastian
Searched in ST forums, datasheets, helps pages, etc
Start with looking at Functionalities depending on the working mode table in PWR chapter of RM0394, and then TSC low-power modes in TSC chapter in RM.
Summary: TSC does not work in Shutdown mode; and in supported modes there's no magic with threshold, you'd need to wake up at every acquisition and compare the result in software.