一種低功耗多功能手持射頻讀卡儀設(shè)計

介紹了一種多功能、低功耗便攜式射頻讀卡器的設(shè)計方法。該讀卡器采用TI公司的低功耗微控制器MSP430F149作為主控芯片，結(jié)合射頻基站芯片U2270B實現(xiàn)TEMIC系列射頻卡的讀寫功能，并采用2560芯片和HT1621B 芯片分別實現(xiàn)語音功能和數(shù)顯功
能。給出了各部分的硬件電路設(shè)計原理圖，描述了各個功能的實現(xiàn)方法，并采用了多種方法以降低系統(tǒng)的功耗。該便攜式讀卡器具有體積小、存儲容量大、讀寫速度快、擴展性好、功耗低等特點，已成功應(yīng)用于停車場收費系統(tǒng)中。
關(guān)鍵詞:手持機 射頻卡 語音功能

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