Descr iption: This program demonstrates a half-duplex 9600-baud UART using // Timer_A3 using no XTAL and an external resistor for DCO ROSC. DCO used for // TACLK UART baud generation. The program will wait in LPM4, e

Descr iption: This program demonstrates a half-duplex 9600-baud UART using // Timer_A3 using no XTAL and an external resistor for DCO ROSC. DCO used for // TACLK UART baud generation. The program will wait in LPM4, e

在《温度计_基本原理》程序中，已经实现了一个温度测量和显示的系统，但因为采样速率很快，且对基准源不加控制，耗电很大(800uA左右)。本例中，将温度采集速度降到1秒一次，且采样间隙时间不仅关闭基准源，还让CPU进入LPM3休眠状态，大大节省了耗电。该程序功耗仅10uA左右，可用纽扣电池长期运行(2年)。实际上对于环境温度1秒1次采样仍属浪费，如果降到5秒一次，功耗可下降到4uA左右(CR2032电池工作5年)。按KEY3后，CPU进入L

A single sample is made on A10 with reference to internal // 1.5V Vref. Software sets ADC12SC to start sample and conversion - ADC12SC // automatically cleared at EOC-A single sample is made on A10 with reference to