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。
This paper introduces the technology of RF-SIM card, and based on current VIP system, advances the design scheme of VIP system based on RF-SIM card, and gives the general design mode.
简要介绍了RF - SIM卡技术,在现有VIP系统的基础上,提出了基于RF - SIM卡技术的VIP系统的设计方案,并给出了总体设计模式。
Based on the comparison and analysis of existing system modeling methods, the paper presents and integrated modeling method GI-SIM developed for logistics system.
通过对现有系统建模分析方法的比较和分析,针对物流系统提出了一种集成建模分析GI - SIM法。
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