数字信号处理器TMS320F240串行通信接口模块SCI和RS-485标准接口芯片MAX485的原理和应用，并给出了TMS320F240与PC机串行通信接口电路，最后，编程实现了串行通信-Digital Signal Processor TMS320F240 and SCI serial communication interface module RS-485 standard interface chip MAX485 theory and applications, and gives TMS320F240 serial communication with the PC, interface circuit, finally, programming of serial communication