本以基于单片机的智能卡水表系统为研究对象,重点探讨了基于MSP430超低功耗单片机在智能水表上的应用和开发。根据智能水表的特点,针对现有IC卡预付费水表在实际应用中存在的问题,研究了一个基于单片机的智能卡水表的设计方案,该方案采用微功耗单片机技术,选用美国德州仪器公司推出的16位MSP430系列单片机,完成了智能卡水表的硬件设计和软件编程,具有稳定性、安全性和低功耗的特点。 This study is based on the single-chip smart card water meter system, focusing on the MSP430 based on ultra-low power single-chip smart meter in the application and development. According to the characteristics of the smart water meter, aiming at the existing problems in the practical application of the prepaid water meter of the IC card, a design scheme of the smart card water meter based on the single chip microcomputer is studied. The scheme adopts the micro-power consumption single chip microcomputer technology and selects the Texas Instruments 16-bit MSP430 series microcontroller, the completion of the smart card water meter hardware design and software programming, with stability, security and low power consumption.