I’m using RAK3172 in a design. How is PB12 wired internally? What does “Internally” mean? I’m trying to understand under what conditions I can safely use the pin.
According to the RAK3172 datasheet: PB12 is: 10 kΩ internally pulled-up for high freq variant or pulled-down for low freq variant. Is this “internal” meaning internal to the STM32 part or under the RAK metal cap? I guess its RAK’s way for a user to poll the pin to discover/determine the RAK3172 variant?
I observe from the STM32WLE5cc6 datasheet and CubeIDE that a GPIO pullup resistor can be applied internally to the STM32WL part, so I am thinking that the 10K resistor referred to in the RAK3172 datasheet means it is something added in the RAK design under the metal cap? Maybe a wiring diagram of RAK3172 is available?
