The aim of this application note is to show to scan the 4x4 matrix keypad multiplexed with a four 7-segment display. The software attached to this application note scans the pressed key and displays it on the multiplexed 7- segment LEDs. Thi

DMC-2440-H采用基于ARM920T内核的Samsung处理器 S3C2440A, 标准主频400MHz，最高主频可达533MHz。采用64MB的SDRAM，2MB的NOR FLASH和64MB的NAND Flash。DMC-2440-H嵌入式开发系统外设非常丰富，功能强大，适用于各种手持设备、消费电子和工业控制设备的开发。支持嵌入式Linux和WINCE5.0.NET操作系统。 采用Linux -2.6.134内核，LINUX驱动支持：DM9000 网卡、串口、RTC、LED、按键、