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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...
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.
- 2022-03-09 10:15:53下载
- 积分:1
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用语言编的小车循迹运动程序,采用凌阳061单片机控制器,在电子应用中功能强大!...
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USB便携多道系统单片机固件程序.单片机固件程序采用CodeWarrior Development Studio for HC(S)08 Microcontro...
USB便携多道系统单片机固件程序.单片机固件程序采用CodeWarrior Development Studio for HC(S)08 Microcontrollers集成开发环境开发,编译后生成的可执行文件为motorola公司的.s19格式,位于源代码的 .in 路径下。同时生成的还有该路径下的.map文件,记录存储空间分配情况。-USB portable multi-channel system microcontroller firmware. MCU firmware procedures used CodeWarrior Development Studio for HC (S) 08 Microcontrollers integrated development environment development, the compiled executable file generated for motorola companies. S19 format at the source code. Bin paths. There are also generated in the path of. Map documents, records storage space allocation.
- 2022-04-09 15:08:51下载
- 积分:1
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12864Lcd c51例子
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- 2022-01-22 13:49:27下载
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51单片机硬盘控制电路以及原程序Demo,可用于CF卡等
51单片机硬盘控制电路以及原程序Demo,可用于CF卡等-51 microcontroller drives control circuit and the original procedure Demo can be used CF card
- 2022-07-24 21:40:39下载
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一个汉字全自动检索软件,包含源代码以及字库
一个汉字全自动检索软件,包含源代码以及字库-a Chinese automatic retrieval software, including source code and font
- 2022-04-26 19:54:43下载
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#include <4bitLCD20x4.h>
#include<ds1307.h>
#include<keypad.h...
#include
#include
#include
#include
#include
#include
- 2022-03-19 00:09:08下载
- 积分:1
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51单片机系统中运用电脑上的大键盘! Keyboard接线 PS/2
51单片机系统中运用电脑上的大键盘! Keyboard接线 PS/2--------51 1 DATA------P3.4 3 GND 4 VCC 5 CLK-------P3.3 接在51的外部中断,触发方式为低电平 AT89x51使用12M Modified by Shen Peng! Postgraduate of 2003, 7 Department Harbin Engineering University-51 microcomputer system on the use of the computer keyboard! Keyboard Connection PS/2--------51 a DATA------ P3.4 three GND 4 VCC five CLK------- P3.3 Then in the 51 external interrupt trigger mode for low-level AT89x51 use 12M Modified by Shen Peng! Postgraduate of 2003, seven Department Harbin Engineering University
- 2022-01-28 21:13:38下载
- 积分:1
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着是基于51的电子密码锁,希望大家支持!!!!谢谢,以后多多交流...
着是基于51的电子密码锁,希望大家支持!!!!谢谢,以后多多交流-51 on the basis of the electronic code lock, I hope you will support! ! ! ! Thank you, after a lot of exchanges
- 2022-03-20 15:02:46下载
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4442逻辑加密IC卡读写底层C51程序,
4442逻辑加密IC卡读写底层C51程序,-4442 encryption logic IC Card Reader bottom C51 procedures,
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