This Application Note describes programming techniques implemented on the AT91 ARM-based microcontroller for scanning a 4x4 Keyboard matrix usually found in both consumer and industrial applications for numeric data entry.

红外设备的键盘输入与LCD1602的现实程序。对学习LCD1602和红外编程何用帮助-Infrared equipment keyboard input and LCD1602practical procedures. To learn LCD1602and infrared programming is used to help

基于KL25的开发例程，本例程关于键盘，LED，LCD，附有相关底层库，十分适合初学者参考编程。-Based on KL25 development routine, the routine on the keyboard, LED, LCD, accompanied by the relevant underlying library, programming is very suitable for beginners reference.

这是一个电子琴的编程，可以实现电子琴的编程-This is a keyboard programming, can achieve the keyboard programming