AT89C51 ISD4004 interface with recording and playback process design, control 40...

点阵显示汉字程串口输出字符数据，P2口输出行扫描信号,P0_0输出595锁存信号-Dot-matrix display Chinese characters-way serial output data, P2 I scan signal output line, P0_0 latch 595 output signal

键盘扫描及返回相关数据,只是读键盘与功能实现的一个接口函数

单片机AT90S系列 制作简易USB接口（软件模拟,无usb硬件）。 programmer- Monolithic integrated circuit AT90S series manufacture simple USB connection (software simulation, non- usb hardware). Programmer

一个用GCC做的atmel芯片控制的无刷无传感器的程序.包括各种参考文档!

利用yc7c68013实现了模数和数模传输，经测试，在keilc51中能通过-Yc7c68013 achieved using D and D transmission, have been tested in China and through keilc51

课程设计，单片机用的是at89s51，C语言编程，希望对有的同学友邦做-Curriculum design, single-chip microcomputer is used at89s51, C language programming, in the hope that some students do AIA

单片微机原理及应用,MCS-51硬件结构-Single-chip Microcomputer Principle and Application, MCS-51 hardware structure

51单片机旋转屏幕的时钟，是doc格式，代码在文章里-51 Single-chip clock rotating screen is doc format, the code in the article

仪器仪表键盘显示模拟系统，用AT89S52芯片作为系统的CPU，控制系统的按键及显示器部分。用8路同相三态双向总线收发器74LS245芯片驱动LED。4X4矩阵键盘作为系统人机交互的重要部分，用于向单片机应用系统输入数据或控制信息，设计4X4矩阵键盘分别对应键码“0-F”。系统可以实现的基本功能包括开机LCD液晶屏幕显示“大专05电子信息X班XXX毕业设计”信息；按下任意一个按键，LCD液晶屏幕显示相应按键的信息。在基本功能的基础上还增加了一个扩展功能，即增加一个LED数码管同步显示相应键码-Show the simulated keyboard instrumentation systems, using AT89S52 chip as a system CPU, system control buttons and display parts. With 8-phase three-state bidirectional bus transceiver 74LS245 chip-driven LED. 4X4 matrix keyboard system as an important part of human-computer interaction, single-chip microcomputer application system used to input data or control information, the design of 4X4 matrix keyboard key code corresponding to

本次设计的RS232 to USB 转换器采用HT82M99E 和MAX232 芯片，其中HT82M99E 为主控芯片，MAX232 为RS232 level shift。本次设计的RS232 to USB 转换器使用操作系统提供的USB HID 设备类驱动程序。-The design of the RS232 to USB converter using HT82M99E and MAX232 chip, which HT82M99E for the master chip, MAX232 for RS232 level shift. The design of the RS232 to USB converter to use the operating system to provide the USB HID device class driver.