The smart meter is a smart terminal of the smart grid. It is not a power meter in the traditional sense. In addition to the metering function of the basic power consumption of the traditional power meter, it also has a two-way multi-rate in order to adapt to the use of the smart grid and new energy. Intelligent functions such as metering function, user-side control function, two-way data communication function of multiple data transmission modes, anti-stealing function, etc. Smart electric meter represents the development direction of intelligent terminal of energy-saving smart grid end user in the future. Figure 1 below is a smart meter application block diagram based on Renesas MCU R5F100PJ, in line with Q/GDW 1354—2013 smart energy meter function specification, Q/GDW 1356—2013 three-phase smart energy meter type specification, Q/GDW 1827- 2013 three-phase smart energy meter technical specification, Q/GDW 1365—2013 smart energy meter information exchange safety certification technical specification, hardware design: module optional, CPU card optional, switch built-in external optional, compatible with SP3W/3P4W. It has rich status indication, time-sharing measurement, multi-rate, historical data, event record storage, self-test, error correction, alarm, multiple communication interfaces and power-off reading, multi-level password protection, and active reporting. Figure 1: Block diagram of the state-of-the-art intelligent three-phase cost-controlled energy meter The RL78 is a new generation of low-power microcontrollers from Renesas Electronics that combines the outstanding CPU performance of the 78K0R with the superior peripheral functions of the R8C and 78K. Provides higher performance and lower power consumption than previous microcontrollers. The RL78/G13 series R5F100PJ is a high-performance, ultra-low power designed by Renesas Electronics for China's intelligent three-meter-controlled energy meter. MCU. It is rich in resources, cost-effective, and ultra-low power consumption. It is widely used in the intelligent three-phase meter industry. The basic characteristics are as follows: 66uA/MHz 0.92uA @32.768kHz HALT mode, RTC, WDT, LCD work 0.57uA @STOP mode, RTC, WDT, LCD work Processor performance 1.27DMIPS/MHz Single-cycle execution instruction, the fastest instruction time is 0.04167us @24MHz, low speed 30.5us @32.768kHz 256k flash, 20k RAM, 8k Dataflash, 92 GPIO ADC and serial interface can operate in STOP mode Built-in high-speed crystal oscillator (CPU up to 24MHz, accuracy is ±1%) Independent low speed crystal (15KHz) Built-in hardware RTC Built-in hardware multiplier Built-in buzzer drive Built-in 1.45V reference voltage Built-in low voltage detection Built-in serial communication (UART, I2C, CSI) Built-in on-chip debugging Wide voltage operation (1.6V~5.5V) Smart meters take on the role of carriers in the energy Internet. It plays an indispensable role in the future allocation of energy markets. Smart meters are an information base that combines the use of Internet and grid communication system facilities to build bandwidth protection, massive computing and sensitive response capabilities. Iwatch Screen Protector,Tempered Glass Package,40Mm Tempered Glass,44Mm Tempered Glass Shenzhen TUOLI Electronic Technology Co., Ltd. , https://www.szhydrogelprotector.com