关于嵌入式PS2键盘的原理图，基于51单片机的工控键盘。很实用，包括程序，基于Keil的软件程序...

按键扫描 51单片机加8279 8279通过74LS 138译码器扩展4×4键盘、6位显示器。 由3-8译码器对SL0～SL2译出键扫描线，由另一3-8译码器译出显示器的位扫描线，并采用了编码扫描方式。 为了防止出现重键现象，扫描输出线高位SL3不参加键扫描译码。CPU对8279的监视采用了查询方式，故8279的中断请求信号IRQ悬空未用。 -Scan button 82,798,279 plus 51 single-chip decoder 74LS 138 through the expansion of 4 × 4 keyboard, the display 6. From 3-8 decoder SL0 ~ SL2 translated to the key scanning line, by another 3-8 decoder translated display scan line, and uses code scanning. In order to prevent the emergence of the phenomenon of re-key, scan the output line does not take part in high level SL3 scan decoding keys. CPU on the 8279 surveillance using the query mode, the 8279 interrupt request signal IRQ left unused.

・单片机系统中的汉字显.. ・c51的usb的通信.. ・ADC0809做的数.. ・基于avr单片机系统.. ・单片机usb2.0 ・单片机系统中的汉字显.. ・c51的usb的通信.. ・ADC0809做的数.. ・基于avr单片机系统.. ・单片机usb2.0 -SCM system of Chinese characters .. c51 marked the usb communications .. ADC0809 so few .. avr microcontroller-based system .. USB 2.0 SCM SCM system of Chinese characters .. c51 marked the usb communications .. ADC0809 so few .. avr microcontroller-based system .. USB 2.0 Microcontroller

Keil C51使用详解-Keil C51 IDE

8051 F330 6位数码管显示 倒记时-8051f330 6 bit digital tube display

SHT71数字温湿度传感器的AVR单片机驱动程序-SHT71 digital temperature and humidity sensor AVR Single Chip Driver

奉献：485 [日期：2005-11-29] 来源：侃单片机 作者：etiller [字体：大 中 小] -Dedication: 485 [Date :2005-11-29] Sources: McCain Singlechip Author: etiller [Font: Xinhuanet]

用于事时监控着发大器的工作进程，如果发现错误，立即发出警告。-matter for the control coupled with the process, if the error is found, immediately issued a warning.

IIc应用子程序，此程序可应用AT24C08等等串行EEPROM芯片的开发和学习使用，此程序调试通过-IIc application subroutine, this procedure can be applied so AT24C08 serial EEPROM chip development and learning to use, this program debugging through

ATMEL 89sxx 系列51单片机下载线原理图 这是ATMEL公司的官方板-ATMEL 89sxx Series 51 Single-chip line schematic download This is the official board ATMEL Corporation

PCI_Express PCB Guidelines