PIC单片机4*4键盘扫描C语言程序

本人学习51时老师的课件。供学习51的朋友参考学习.-for study 51 reference.

AP89042是不可从复录音的分段式语音芯片,对语音电路的开发人员有一定的帮助.-AP89042 is not from the sub-Minute recording voice chip, the voice circuits developers will help.

本系统采用MSC-51系列单片机ATSC51和可编程并行I/O接口芯片8255A为中心器件来设计交通灯控制器，实现了能根据实际车流量通过8051芯片的P1口设置红、绿灯燃亮时间的功能；红绿灯循环点亮，倒计时剩5秒时黄灯闪烁警示（交通灯信号通过PA口输出，显示时间直接通过8255的PC口输出至双位数码管）；车辆闯红灯报警；绿灯时间可检测车流量并可通过双位数码管显示。本系统实用性强、操作简单、扩展功能强。 -The system uses MSC-51 series single-chip ATSC51 and programmable parallel I/O interface chip 8255A-centric device designed to control traffic lights, can be achieved in accordance with the actual traffic flow through the P1 port 8051 chip set red, green fuel Liang function of time traffic light cycle, the countdown five seconds left when the yellow light flashing warning (traffic lights through the PA output signal indicates the time directly through the PC port output 8255 to double-digits) vehicle alarm闯红灯 green time traffic flow can be detected through a double-digital display. The system practical, simple and strong extensions.

51单片机控制网卡实现上网程序代码，编译环境为Keil C51-51 MCU control card online code, compile environment for the Keil C51

基于单片机8051的嵌入式开发指南.pdf 电子工业出版社-Based on the 8051 single-chip embedded development guide. Pdf Publishing House of Electronics Industry

简单的12864（控制器ST7920）液晶显示模块并行和总线方式控制c语言源程序-Simple 12864 (controller ST7920) liquid crystal display modules in parallel and bus control c language source code

直流电机控制系统礼包.运用凌阳单片机完成的直流电机控制系统.-DC Motor Control System Package. Singlechip Sunplus completed the use of DC motor control system.

基于ST792012864lcd驱动程序

基于51单片机的U盘型MP3设计（含C语言程序，原理图）-51 MCU-based U-disk-based MP3 design (including C language program, schematic diagram)

采用4046实现的10m以下信号的锁相环 电路图。-used to achieve the 4046 10m below the signal phase-locked loop circuit.