有关74hc080的一些相关资料，希望可以帮助大家，它多用于IC卡读取了！...

c51单片机实现GPS数据接受并通过数码管显示时间-c51 achieve single-chip GPS data receive and display digital time

硬盘MP3电路图,-Hard Drive MP3 schematics,

can总线应用

avr c使用手册，帮助初学者能够快速的了解avr系列的单片机-avr c user manual, help beginners to quickly understand avr microcontroller series

使用国产CH341A芯片实现USB转串口，完全兼容AVR JTAGICE，可以自动升级。 支持芯片: ATmega16(L), ATmega162(L), ATmega169(L or V), ATmega32(L), ATmega323(L), ATmega64(L), ATmega128(L). 原理图还附加了RS232接口，可以方便用户自主选择串口或USB下载程序。 还附加有可自动升级的HEX文件-The use of domestically produced CH341A chip USB to serial port, fully compatible with the AVR JTAGICE, can be automatically upgraded. Support chips: ATmega16 (L), ATmega162 (L), ATmega169 (L or V), ATmega32 (L), ATmega323 (L), ATmega64 (L), ATmega128 (L). Schematics also added a RS232 interface, can easily users to choose the serial or USB download. Additional there is also automatically upgrade the HEX file

在C8051F930单片机上，利用端口匹配和PCA实现按键的长按、短按功能。-In the C8051F930 microcontroller, using the port matching and PCA to achieve a long button press, short press functions.

读取韦根数据转换成RS232后传给上位机的程序-Wiegand reader into RS232 data to the host computer after the procedure

i2c硬件通信例程，lpc922单片机，可以完成y与eeprom的通信！-i2c hardware communication routines, lpc922 single-chip, to be completed y the communication with the EEPROM!

支持键盘双击事件的C程序设计,51实例，验证过的-Double-click the event to support the keyboard C-program design a

用C语言编写的交通灯上的程序，这里只取出了读取8563的一段程序。-Using C language programs on the traffic lights, only one out of the reading section of procedures for 8563.