外文翻譯資料---電子時(shí)鐘設(shè)計(jì)-其他專業(yè)-在線瀏覽
2025-03-24 10:21本頁面
【正文】 lt. Even if the prototype or simulation results show that there is no static dangerous, but in fact the risk may still exist. In general, we should not use multilevel binational logic to clock the flipflop in the PLD design. Travelingwave clock clock another popular use of travelingwave circuit is the clock, that is, the output of a flipflop used as a clock input of another flipflop. If careful design, travelingwave clock can be the same as the global clock to work reliably. However, the travelingwave clock made from time to time with the calculation of the circuit bees very plicated. Linewave travelingwave clock flipflop of the chain have a greater clock time between the offset and exceed the worst case the setup time, hold time and clock to the output circuit of the delay, allowing the system to the actual slowed down. Multiclock system, many system requirements within the same multiPLD clock. The most mon example is the two asynchronous interfaces between microprocessors, or microprocessors and asynchronous munication channel interface. As the clock signal between the two requirements to establish and maintain a certain time, so that the above application from time to time the introduction of additional constraints. They also requested that some asynchronous synchronization signal. In many applications, only the synchronization of asynchronous signals is not enough, when the system of two or more nonhomologous clock, the data it is difficult to establish and maintain the time to be assured that we will face the plex matter of time . The best way is to all nonhomologous clock synchronization. PLD internal use of the lock loop (PLL or DLL) is a very good, but not all of PLD with a PLL, DLL, and chip PLL with most expensive, so unless there are special requirements, the general occasions PLL can not use with the this time we need to take to enable the use of the D flipflopside, and the introduction of a highfrequency clock. 采用 L ED 數(shù)碼管的數(shù)字顯示以其亮度高、顯示直觀等優(yōu)點(diǎn)被廣泛應(yīng)用于智能儀器及家用電器等領(lǐng)域 . 本文介紹一種以 AT89C52 單片機(jī)為核心 ,以共陽極高亮度 L ED 數(shù)碼管作為顯示器件組成 7 位數(shù)字顯示的實(shí)用多功能電子時(shí)鐘的設(shè)計(jì) ,該時(shí)鐘可顯示星期、時(shí)、分、秒 ,也可切換為年、月、日顯示 ,同時(shí)具有整點(diǎn)音樂報(bào)時(shí)及定時(shí)鬧鐘等功能 ,也可作電子秒表使用。 中文 2722字 外文資料翻譯 LED using digital tube digital display its highbrightness, indicating the advantages of intuitive intelligence is widely used in areas such as equipment and household appliances. AT89C52This article describes a singlechip microputer as the core, to a total of anode highbrightness LED L ED as a display posed of seven figures show that the pract
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