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KeywordsClockelectricclockDS1302；DS18B20Dy
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f目录
一、设计要求与方案论证411设计要求412系统基本方案选择和论证4121单片机芯片的选择方案和论证4122显示模块选择方案和论证4123时钟芯片的选择方案和论证412r