【摘要】 介绍了一种基于MSP430单片机的复费率单相电能表的主电路及通信接口电路,给出了其具体电路,采用AD7755作为专用电量测量芯片以保证测量脉冲数的准确性,硬件日历时钟及参数存储采用总线器件以减少电路连线。综合设计使电能表的工作可靠性得到大大提高。同时对系统的软件设计和可靠性设计也作了介绍。更多还原

【Abstract】 The main control and communicating interface circuits of the multi- rate watt- hour meter based on MSP430 single chip isdiscussed in detail in this paper. The principle of the multi- rate watt- hour meter is also introduced. The measuring of watt- hourhas higher accuracy by the special AD7755. Addresses and data of the clock/calendar and data storage circuits are transferred serial-ly via the two- line bidirectional I2C bus which simplifies circuit and enhances the reliability. Software and reliability design of this system are also mentioned.更多还原