Multifunctional electric energy meter
A multi-functional technology for electric energy meters, which is applied in the field of electric energy meters, can solve the problems affecting the program execution speed and efficiency, limited memory and IO port resources, and inconvenient display of dot matrix Chinese characters, etc., to achieve reasonable analysis and configuration, intuitive man-machine Conversation, power saving effect
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[0017] A single-chip multifunctional electric energy meter is composed of Microchip dsPIC30F6014A single-chip microcomputer, power supply circuit, external clock circuit, LCD Chinese character display and keyboard, measurement circuit, communication interface, pulse output interface, such as figure 1 shown.
[0018] The Microchip dsPIC30F CPU module uses a high-performance 16-bit (data) modified Harvard architecture with an enhanced instruction set including strong support for DSP. The CPU has a 24-bit instruction word with a variable-length opcode field. The program counter (PC) is 24 bits wide and can address up to 4M x 24 bits of user program memory space. The DSP engine has a high-speed 17-bit × 17-bit multiplier, a 40-bit ALU, two 40-bit saturating accumulators, and a 40-bit bidirectional barrel shifter. Microchip dsPIC30F series MCU integrates sampling, keys, LCD driver, dual communication, non-volatile data storage and other modules, with a working speed of up to 30MI...
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