基于atmel公司带USB2.0控制器、51内核的单片机AT89C5131F和K9F5608U的U盘读写源程序(keilC uversion3环境)-atmel based company with USB2.0 controller, 51 MCU kernel and K9F5608U AT89C5131F U disk read and write source (keil C uversion3 Environment)

51单片机实现4*5矩阵键盘C语言编程，采用反接扫描法。-51 MCU 4* 5 matrix the keyboard C language programming, reverse scan method.