單片機(jī)設(shè)計(jì)外文翻譯--單片機(jī)的休眠運(yùn)算復(fù)位和抗干擾能力完善-單片機(jī)(存儲版)
【正文】 choose rationally. As to simple to show instrument, restore to the throne cycle determine data break cycle, low electricity is it measure, hancl over all time shown to greater than to want at ordinary times。s trigger to have a facelift。Analyse its scope of application, provide and use the circuit concretly。在復(fù)位后測量這些引腳如果第一次測量是低電平則一些引腳是連接電容后接地。 在日常生活中減少周期和復(fù)位的用電量 復(fù)位信號在高層次的 TR 和單片機(jī)是在程序不運(yùn)行時(shí)抗干擾能力是最強(qiáng)的，之后高層次的單片機(jī)開始進(jìn)行執(zhí)行程序。在某些場合，時(shí)間的休眠會很長，但更有效的提高了抗干擾能力。至于唯一的數(shù)據(jù)顯示，雖然有些讀入數(shù)據(jù)在 1 秒內(nèi)出現(xiàn)錯(cuò)誤但對下次測量沒有影響或可以承受的都屬于可忽略的錯(cuò)誤。 1. 原理和實(shí)施方法 無條件定期復(fù)位 使用定時(shí)器，專用時(shí)鐘芯片或其它脈沖發(fā)生器在某一部分定期產(chǎn)生復(fù)位信號。智能維護(hù)邏輯控制電路取代了以往的測量電路的數(shù)字邏輯控制電路，并將其發(fā)展。很多反干擾技術(shù)（例如有軟件隔欄；將硬件的接口放入狗的電路中等等）可以使這一問題的到很好的解決，但仍然存在著問題：① 連接狗的電路運(yùn)行時(shí)好時(shí)壞，這是在某些場合是不允許的。這當(dāng)然是非?？斓模诜€(wěn)定的運(yùn)行中，數(shù)據(jù)每秒只有 12 倍的提高，在大量的時(shí)間內(nèi) CPU 是用來等待讓 CPU的工作并工作后進(jìn)入休眠，復(fù)位和外界條件觸發(fā) CPU執(zhí)行下次指令，這就是復(fù)位，這樣才能使抗干擾能力大大加強(qiáng)。 外部條件復(fù)位法 部分進(jìn)入是由外界控制的，舉例來說，加熱升溫供暖的旋轉(zhuǎn)脈沖 產(chǎn)生，并計(jì)算有熱水車輪產(chǎn)生的熱量，沒有熱水流量也沒有熱出口量時(shí)中央處理器只需要在事實(shí)上使用的數(shù)值，也不用計(jì)數(shù)。 50Hz 電力使用后已經(jīng)省略定時(shí)器，在同一時(shí)間內(nèi)聚結(jié)相應(yīng)的信號相位 ，其中包括測量電流信號。以簡單的顯示工具來確定復(fù)位周期數(shù)據(jù)打破原周期，低電平就是它的措施，有時(shí)其會超過平常任何時(shí)候所表現(xiàn)出來的數(shù)據(jù)，否則目前完整執(zhí)行計(jì)劃永遠(yuǎn)是錯(cuò)的。這是因?yàn)閱纹瑱C(jī)程序運(yùn)行的特殊性所導(dǎo)致的。 ②Procedure appear circulation mistake very much sometimes, but just guard the gate dog control link include and enter, adopt and guard the gate as to such a mistake dog unable to discern。 Otherwise, cant present forever the mistake of the intact executive integrated circuit in Ts and Tr period all can effectively the antijamming, but is best the unnecessary time arrangement in Tr. When the program time is long, when as far as possible the request reduces Tr, may join the differentiating circuit, like chart 1 center C30, R26, D9. Has the electricity to measure and restore to the throne manually Some system is it make some initialize and operate to want at electricity for the first time. Restored to the throne and already bee the beginning condition of normal running each time while adopting the way of restoring to the throne to run , it is unable to distinguish and have the electricity for the first time. In some pin connects the electric capacity of one ljIF to the ground, measure this pin after being restored to the throne, if low level to have electricity for the first time. Give system set up one restore to the throne button, that is to say a mon one manual to restore to the throne, this button is not joined and being restored to the throne in the end, is connected in parallel in the electric capacity both ends to the ground of abovementioned pins. Result: Conclusion Antiinterference is an important problem in an electronic design, especially Important in the onechip puter. This is becau
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