基于C8051F020单片机PCA操作代码，通过它，你会很快熟悉C8051F单片机对以PCA的操作。稍微修改，即可加入自己的工程。 -PCA based on C8051F020 MCU operation code, through it, you' ll quickly become familiar with C8051F MCU on the PCA operation. Slightly modified, you can add your own project.