I have a K2 Neo and just disassembled it to get to the motherboard, and the CH430 is definitely connected to PA2 RX, PA3 TX. And there is a 8Mhz and 12Mhz external clock source.
I have a K2 Neo and just disassembled it to get to the motherboard, and the CH430 is definitely connected to PA2 RX, PA3 TX. And there is a 8Mhz and 12Mhz external clock source.