NXP EM773 8（16）位智能电表解决方案

NXP 公司的EM773是基于ARM Cortex-M0的低功耗32位智能电表集成电路，CPU频率高达48MHz，具有丰富外设包括多达32KB标闪存，多达8KB数据存储器，一个Fast-mode PlusI2C总线接口，一个RS-485/EIA-485 UART，一个带SSP特性的SPI接口，三个通用计数器/定时器，多达25个GPIO，以及用于电能测量的测量引擎。本文介绍了EM773主要特性和优势，方框图，智能电表原理方框图，电表主要元件BOM以及智能电表无线插头电表电路图和电表指标。

EM773：Energy metering IC; up to 32 kB flash and 8 kB SRAM

The EM773 is an ARM Cortex-M0 based, low-cost 32-bit energy metering IC, designed for 8/16-bit smart metering applications. The EM773 offers programmability and on-chip metrology functionality combined with a low power, simple instruction set and memory addressing with reduced code size compared to existing 8/16-bit architectures.

The EM773 operates at CPU frequencies of up to 48 MHz.

The peripheral complement of the EM773 includes up to 32 kB of flash memory, up to 8 kB of data memory, one Fast-mode Plus I2C-bus interface, one RS-485/EIA-485 UART,one SPI interface with SSP features, three general purpose counter/timers, up to 25 general purpose I/O pins, and a metrology engine for energy measurement.

EM773主要特性和优势：

System:

ARM Cortex-M0 processor, running at frequencies of up to 48 MHz.
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