微處理器 - STMicroelectronics STM32F401 (WeAct Black Pill) - Schematic

參考資訊：
https://github.com/STM32-base
https://stm32world.com/wiki/Black_Pill
https://stm32-base.org/boards/STM32F411CEU6-WeAct-Black-Pill-V2.0.html