1.RS-232-C详解

2.串口通信基本接线方法

3.串口通讯的概念及接口电路

4.有关RS232和RS485接口的问答

同步通信方式

通信协议-1.RS-232-C detailed explanation



2 basic wiring method



3 serial communication interface circuit concept and



About 4 of RS232 and RS485 interface.



Synchronous communication mode



Communication protocol