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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.
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KS0108控制器的12864液晶驱动程序,实现了整个画面,中国…
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MCU Pwm to produce motor control hardware and software design, appendix to the s...
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《单片机原理与实用技术》第10章
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The design of traffic lights! Can simulate the traffic lights just to the law, t...
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用于远程抄表系统中的一个现场数据采集模块,精确到小数点后2位,可采集2路单脉冲2路双脉冲,并向上位机提供数据...
用于远程抄表系统中的一个现场数据采集模块,精确到小数点后2位,可采集2路单脉冲2路双脉冲,并向上位机提供数据-For remote meter reading system in a field data acquisition module, accurate to two decimal places can capture 2-way single-pulse 2-way dual-pulse, to the host computer to provide data
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MSP430 IAR 汇编器用户指南.rar
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- 2022-04-01 22:36:44下载
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I2C的51源程序
I2C的51源程序-source I2C 51
- 2022-10-17 10:10:03下载
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单片的得isp实现的全部资料。大家看看阿,不错哦,好东东阿。...
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