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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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单片机与微型打印机的接口,使用单片机控制微型打印机
单片机与微型打印机的接口,使用单片机控制微型打印机-Single-chip and micro-printer interface, the use of single-chip micro-control printers
- 2022-02-12 20:57:03下载
- 积分:1
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c8051f020 the I2C procedures have been adopted to debug
c8051f020的I2C程序,已经通过调试-c8051f020 the I2C procedures have been adopted to debug
- 2022-01-28 21:02:15下载
- 积分:1
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IDE hard disk source code, can read and write Sector, no file system
ATmega16L控制IDE硬盘的源代码,可以读写扇区,无文件系统-IDE hard disk source code, can read and write Sector, no file system
- 2022-04-10 17:58:22下载
- 积分:1
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S3C2440 arm9芯片上RTC的测试程序,可以测试RTC是否正确运行,以及能对RTC进行时间设置。...
S3C2440 arm9芯片上RTC的测试程序,可以测试RTC是否正确运行,以及能对RTC进行时间设置。-RTC chip S3C2440 arm9 test procedures to test whether the RTC correctly, and be able to set the RTC time.
- 2022-04-23 05:03:41下载
- 积分:1
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香港科大机器人资料
单片机相关知识,开发平台多样
香港科大机器人资料
单片机相关知识,开发平台多样-HKUST Information Singlechip robot-related knowledge, development platform for diverse
- 2022-03-26 10:32:39下载
- 积分:1
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compiled by the two dual
编译通过的两块单片机读写双口RAM7132的原程序!供大家参考!-compiled by the two dual-port MCU literacy RAM7132 the original program! For your reference!
- 2022-05-28 04:26:38下载
- 积分:1
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SDU的字库,主要包垮一些程序代码,很好用的,希望对大家有用...
SDU的字库,主要包垮一些程序代码,很好用的,希望对大家有用-SDU
- 2022-01-28 15:28:47下载
- 积分:1
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基于sja1000的CAN驱动程序 可以直接使用在现场总线中
基于sja1000的CAN驱动程序 可以直接使用在现场总线中-sja1000 based on the CAN driver can be used directly in Fieldbus
- 2022-03-06 03:06:44下载
- 积分:1
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红外-RS232协议转换器电路图适合51系列单片机
红外-RS232协议转换器电路图适合51系列单片机-infrared-RS232 protocol converter circuit for 51 Series MCU
- 2022-04-21 15:59:27下载
- 积分:1