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CH559Pico

WCH(南京沁恒微电子股份有限公司)の8ビットマイコンCH559を使った、RaspberryPi Pico型のマイコンボードです。 主な特徴は以下のとおりです。

またRaspberryPi Picoとは、以下のような違いがあります。

  • 一部ピンの機能が異なる
  • IOピンは基本3.3V（P1.0-7とP4.6/7のみ5V入力OK）
  • +3.3V出力の電流供給能力は100mA程度（CH552内蔵レギュレータの性能）
  • リセット(RST)は正論理で、"1"でリセット
  • +5V端子に、外部電源から+5Vを供給可能（内部にレギュレータはないので、+5Vを超える電圧は不可）

ピン配置

基板上の"LED"（オレンジ）はP1.5で駆動できます。

訂正

基板上の2個のシルク表示が逆になっているロットがあります。正しくは、RSTスイッチ側のD2が"LED"（オレンジ）、反対側のD1が"POW"（緑、電源インジケータ）です。

Author

Junichi Akita (@akita11) / [email protected]

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