TI MSP430F471xx超低功耗三相电表解决方案

TI公司的MSP430F471x3, MSP430F471x6和MSP430F471x7是超低功耗混合信号微控制器,集成了三个,六个或七个16位sigma-delta ADC,两个16位定时器,四个通用串行通信接口(USCI),DMA,68个I/O引脚以及带对比控制的LCD驱动器,每路有差分输入对和可编程输入增益, 工作电压1.8 V 到3.6 V,工作模式在1MHz/2.2V是的功耗为350uA,待机模式为1.1uA,关断模式为0.2uA,主要用于电表和手持测量仪表.本文介绍了MSP430F471xx主要特性,方框图以及三相四线星形连接的电表框图和电路图.
The Texas InstrumentsMSP430 family of ultralow-power microcontrollers consists of several devices featuring different sets of peripherals targeted for various applications. The architecture, combined with five low-power modes, is optimized to achieve extended battery life in portable measurement applications. The devices feature a powerful 16-bit RISC CPU, 16-bit registers, and constant generators that contribute to maximum code efficiency.The digitally controlled oscillator (DCO) allows wake-up from low-power modes to active mode in less than 6us.
The MSP430F471xx series are microcontroller configurations targeted to single-phase and poly-phase electricity meters with three, six, or seven 16-bit sigma-delta A/D converters. Each channel has a differential input pair and programmable input gain. Also integrated are two 16-bit timers, four universal serial communication interfaces (USCI), DMA, 68 I/O pins, and a liquid crystal driver (LCD) with integrated contrast control.
MSP430F471xx主要特性:
D Low Supply-Voltage Range: 1.8 V to 3.6 V
D Ultralow Power Consumption
-- Active Mode: 350uA at 1 MHz, 2.2 V
-- Standby Mode: 1.1 uA
-- Off Mode (RAM Retention): 0.2 uA
D Five Power-Saving Modes
D Wake-Up From Standby Mode in Less Than 6us
D 16-Bit RISC Architecture, 62.5-ns Instruction Cycle Time
D Three-Channel Internal DMA
D Three, Six or Seven 16-Bit Sigma-Delta Analog-to-Digital (A/D) Converters With Differential PGA Inputs
D 16-Bit Timer_B With Three Capture/Compare-With-Shadow Registers
D 16-Bit Timer_A W...