By analyzing the application program interface of TC35I wireless module, the peripheral circuit is designed. Through the device we can receive or send short messages.

通过对TC 35i模块的应用程序接口的分析，设计出它的外围电路，从而实现一个可以进行移动短消息收发的设备。

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Calculator chip is a typical kind of digital large scale integrated circuit. It consists of microprocessor and peripheral display diver and keyboard interface circuit.

电子计算器是一种典型的大规模数字集成电路，主要由微处理器和外围的显示电路、键盘接口电路等组合而成。

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Hardware designs the interface circuit between ATmegal280 and GPS. electronic compass, inclinometer, beacon receiver or digital tuner, including DC motor drive, button, display peripheral circuits.

详细介绍了GPS、电子罗盘、数字高频头、信标接收机、直流电机驱动、按键、显示、通信等关键硬件电路设计。

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