I am trying to develop a product using the STM32WB5MMG.In the schematic of STM32WB5MMG, the pins PC5, PB10 and PB11 are connected to GND via 3.3pF (C7, C8, C9).Why are these pins connected to GND via 3.3pF (C7, C8, C9)?Does this mean that PC5, PB10 a...

(1)I am trying to develop a product using the STM32WB5MMG.Can I leave the unused IO pins of the STM32WB5MMG as NC?Do I need to do pull-down (or pull-up) in HW?The STM32WB5MMG has a lot of IO pins.If I need to place a pull-down resistor, I'll have to ...