本实例用PIC16F505单片机，

按键定位脚：RC3，RC4.

LED指示灯输出：RC0 RC1 RC2

实现功能：短击RC3脚按键，RC0上的LED亮，RC1，RC2上的LED不亮。长按RC3上的按键，RC1，RC2上的LED亮，RC0上的灯灭。

RC4上的按键作为关机键（不管是短击状态还是长击状态都可以关机）。

-PIC16F505 microcontroller used in this example, the key positioning feet: RC3, RC4. LED indicator output: RC0　RC1　RC2　functions: short strike RC3 pin button, RC0 the LED light, RC1, RC2 the LED is not lit. Long press the buttons on RC3, RC1, RC2 LED lights on, RC0 the lights out. RC4 keys on the keyboard as a shutdown (either short or long shot hit the state can shut down state).