基于PSTN的手持式低功耗调制解调器设计

Design of Handheld and Low-Power Consumption MODEM based on PSTN

基于公共交换电话网络线路,采用低功耗微处理器ATMEGA128L和高性能低功耗调制解调芯片CMX869,设计了一种手持式低功耗调制解调器。简要介绍了设计目标、功能组成以及主要器件的性能特征,从硬件和软件两方面详细论述了低成本低功耗调制解调器的的设计方案,给出了系统的硬件结构及软件流程图,并指出了手持式低功耗调制解调器在远距离数据传输系统中广泛的应用前景和价值。

Based on PSTN （Public Switched Telephone Network） lines, and with ATMEGAI28L microprocessor of low power consumption and CMC869 MODEM chip of high performance and low power consumption, a type of handheld and low-power consumption MODEM is designed. The paper briefly describes the design goals, functional components, performance indicators of princcipal devices, expounds from hardware and software the design of low-cost and low-power MODEM, and gives the hardware diagram and the program flow chart. It finally points out the application prospect and value of the bandheld and low-power MODEM in the long-distance data transmission system.