he LPC932 can be used to create a Pulse Width Modulated PWM signal. That s an analog signal, with only 2 discrete levels, for example 0V and 5V and a constant period. The current value of this signal at a certain poiTnt of time is proportional to its

battery_low_detect keil c51,cpu---lpc932 -battery_low_detect keil c51, cpu --- lpc932

C－用LPC932的电表主程序-C-meter with the main program LPC932