What does TSC_IOASCR do?

[DK.6]

What does the TSC_IOASCR register do?

Checked the reference manuals for STM32 WB35xx/WB55xx (RM0434) and F0xx (RM0091) and only get the following information:

 

What's the behaviour of this setting for pins in the various modes (unused, sampling, channel)? I see that it says "Note: These bits control the I/O analog switch whatever the I/O control mode is (even if controlled by standard GPIO registers)." but what does controlling the analog switch mean and how does it relate to TSC?

[Stassen.C]

Hello DK.6,

You can find more information about the TSC for the WB here:

https://www.st.com/content/ccc/resource/training/technical/product_training/group0/cb/25/df/48/a9/6b/45/89/STM32WB-Peripheral-Touch-Sensing-Controller-TSC/files/STM32WB-Peripheral-Touch-Sensing-Controller-TSC.pdf/_jcr_content/translations/en.STM32WB-Peripheral-Touch-Sensing-Controller-TSC.pdf

It shows what the analog switch (controlled by TSC_IOASCR ) is and what it's used for.

Regards,

Stassen