Board Map

LED Indicator

  • PB12
  • PB13

programming port

  • DIO / CLK / SWO / TDI / RST on the front side
  • Programming interface SWD shoul be used:
    • 3V3
    • GND
    • DIO
    • CLK

Note

  • Crystal - 8M
  • D+ pull-up to PA8 for V2 bootloader, and to 3.3V for V3 bootloader

ref