简易232串口通讯电路,不用集成电路---------------------单片机和PC通讯-232 serial communications circuits, no IC --------------------- SCM and PC communication

凌阳单片机串口通信 1．了解SPCE061A串行口（UART）的结构 2．掌握双CPU通讯的编程方法-Sunplus a microcontroller serial communication. Understanding SPCE061A serial port (UART) Structure 2. Master dual-CPU communications programming