-
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
-
SAA7121绝对正确登记的初始化值，包括PAL、NTSC、..
绝对正确的SAA7121寄存器初始化值，包括PAL、NTSC,不能用你找我-SAA7121 absolutely correct register initialization value, including PAL, NTSC, you should not use me
- 2022-05-09 12:24:43下载
- 积分：1
-
VB编写的无线信息发布系统（短信收发与数据库处理结合），全套程序！自带PDU短信编码字库！该字库可用单片机上的短信系统开发。还具备电话呼叫功能！...
VB编写的无线信息发布系统（短信收发与数据库处理结合），全套程序！自带PDU短信编码字库！该字库可用单片机上的短信系统开发。还具备电话呼叫功能！-VB prepared by the wireless information delivery system (SMS transceiver combined with database processing), a full set of procedures! PDU encoded messages own character! The font available on the SCM messaging system development. It also possesses ability to call!
- 2022-03-20 13:21:30下载
- 积分：1
-
超声波测距模块的手动原理图程序，有绝对的参考资料。
超声波测距模组使用说明书 电路图 程序 绝对有参考价值 -Ultrasonic Ranging Module Manual Schematics procedures have absolute reference value
- 2022-04-02 08:56:17下载
- 积分：1
-
自制小时钟 可以遥控调节时间，采用315M 2262 ，2272 收发模块 发来给新手看看...
自制小时钟 可以遥控调节时间，采用315M 2262 ，2272 收发模块 发来给新手看看 -Self-made small-time clock can be adjusted remotely, using 315M 2262, 2272, sent to the transceiver module to see if novice
- 2023-06-05 16:20:03下载
- 积分：1
-
C51中必备的汉字内码提取工具,让单片机很好的输入输出汉字.
C51中必备的汉字内码提取工具,让单片机很好的输入输出汉字.-C51 in the essential character of the code extraction tool that allows single-chip input and output of Chinese characters very well.
- 2023-05-02 07:10:04下载
- 积分：1
-
该程序为一arm参考程序,实现在液晶屏上画垂直线,水平线和直线...
该程序为一arm参考程序,实现在液晶屏上画垂直线,水平线和直线-One arm of the procedure reference procedures realize the LCD screen painting vertical lines, horizontal and straight-line
- 2022-12-22 20:55:02下载
- 积分：1
-
nRF2401 chip information handbook to facilitate the development of wireless modu...
nRF2401芯片资料手册，便于开发无线模块-nRF2401 chip information handbook to facilitate the development of wireless module
- 2022-01-28 15:34:52下载
- 积分：1
-
3926的源代码，包括单片机的8051 / 8096 / 8099 / 8048的编译工具，装配…
由3926个源代码，包括8051/8096/8099/8048单片机汇编工具、 汇编语言、摩托罗拉m68HC11、m680x0系列汇编语言、inter8051单 片机汇编语言、dos未公开的秘密、windows进程控制、图形编程、 创新32位声开发、视频实例等众多内容，内容十分的丰富，绝对是 汇编语言的知识宝库！-by 3926 source code, including SCM 8051/8096/8099/8048 compilation tools, assembly language, Motorola m68HC11, m680x0 series of assembly language, assembly language inter8051 SCM, dos not an open secret, process control windows, graphical programming, innovative 32 Sound development, and many other examples of video content, which is very rich, is absolutely assembly language reservoir of knowledge!
- 2022-03-21 15:32:09下载
- 积分：1
-
电缆测试程序来测试电缆长度（300m）排序，使用抗
网线测试仪程序，可测试网线长度（300M内），排序，用脉冲反波测试，时间*速度=距离的原理。-Cable tester program to test cable length (300M) with sorting, using anti-wave test pulse, time* speed = distance principle.
- 2022-01-26 14:00:30下载
- 积分：1
