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一种低功耗多功能手持射频读卡仪设计
王敏
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介绍了一种多功能、低功耗便携式射频读卡器的设计方法。该读卡器采用TI公司的低功耗微控制器MSP430F149作为主控芯片，结合射频基站芯片U2270B实现TEMIC系列射频卡的读写功能，并采用2560芯片和HT1621B 芯片分别实现语音功能和数显功
能。给出了各部分的硬件电路设计原理图，描述了各个功能的实现方法，并采用了多种方法以降低系统的功耗。该便携式读卡器具有体积小、存储容量大、读写速度快、扩展性好、功耗低等特点，已成功应用于停车场收费系统中。
关键词:手持机 射频卡 语音功能
Abstract: The design method of a low power consumption and multifunctional portable RF card reader is introduced. In the reader, the low power consumption micro controller MSP430F149 from TI is used as main control chip, combining with the RF base station chip U227013, the read and write functions of TEMIC series RF cards are accomplished. The voice function and digital display function are carried out by adopting 2560 chip and HT1621B chip. The designing principle schematics of each hardware part are given, the implementing methods of each function are described. Various measures are taken to lower the power consumption. The portable card reader features compact, large storage, fast read and write speed, good expandability and low power ion. It has been successfully used in charging systems of parking areas.
Keywords:H andh elda pparatus RFc ard ower consumpt Voice function
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