Hello @Dongs
From my understanding on the STM32WBA55C in the 48-pin package, TSC Group 4 cannot be used as a normal standalone touch-sensing group because it has no available sampling IO , a usable TSC group normally needs at least one sampling pin and one channel pin. In a full 4-IO group, this usually leaves 3 usable touch channels after reserving 1 pin for sampling. Since Group 4 cannot provide that sampling function on this package, it should not be counted as a full TSC group for your design. As a result, achieving 12 TSC channels plus 1 SPI and 1 ADC on the UFQFPN48 package is likely very difficult.
THX
Ghofrane
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