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Description: 本次课程设计使用到了8255及8279两个芯片，两个芯片的工作方式，他们的使用方法，并且结合汇编知识编写代码实现课程设计的要求。-The use of curriculum design to the 8255 and 8279 the two chips, two chips working methods, their use and combination of knowledge of writing code to achieve the compilation of the curriculum design requirements.
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Size: 105472 |
Author: GFQ0 |
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Description: 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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Size: 2048 |
Author: qiumh |
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Description: 介绍详细的8279使用资料及注意事项，包括与单片机的使用及防抖电路-8279 introduced the use of detailed information and attention to matters, including the use of single-chip microcomputer and the Anti-shake circuitry
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Size: 6865920 |
Author: 雁过无痕呢 |
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Description: 用8279写的一个时钟程序，有电路图，有什么不好之处请指教！-With a clock procedure which 8279 write, has the circuit diagram, has any not good place please to advise!
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Size: 64512 |
Author: 小郭 |
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Description: 出租车计价器 用于8253 8279等芯片实现计价功能-Taximeter 82,538,279 for the valuation functions such as chip
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Size: 1024 |
Author: 冯超 |
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Description: 出租车计价器 用于8253 8279等芯片实现计价功能-Taximeter 82,538,279 for the valuation functions such as chip
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Size: 1024 |
Author: nexpe |
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