SIM读卡器和手机数据接口是基于PC机串行通信口，利用一片74hc14芯片实现接口功能。
SIM reads the card and the handset data interface is based on the PC machine serial port, USES a piece of 74hc14 chip to realize the interface function.
SIM读卡器和手机数据接口是基于PC机串行通信口，利用一片74hc14芯片实现接口功能。
SIM reads the card and the handset data interface is based on the PC machine serial port, USES a piece of 74hc14 chip to realize the interface function.
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