rain-fall, pointers, vectors
标签： rain-fall pointers vectors
上传时间： 2014-08-26
上传用户：BOBOniu
All inputs of the C16x family have Schmitt-Trigger input characteristics. These Schmitt-Triggers are intended to always provide proper internal low and high levels, even if anundefined voltage level (between TTL-VIL and TTL-VIH) is externally applied to the pin.The hysteresis of these inputs, however, is very small, and can not be properly used in anapplication to suppress signal noise, and to shape slow rising/falling input transitions.Thus, it must be taken care that rising/falling input signals pass the undefined area of theTTL-specification between VIL and VIH with a sufficient rise/fall time, as generally usualand specified for TTL components (e.g. 74LS series: gates 1V/us, clock inputs 20V/us).The effect of the implemented Schmitt-Trigger is that even if the input signal remains inthe undefined area, well defined low/high levels are generated internally. Note that allinput signals are evaluated at specific sample points (depending on the input and theperipheral function connected to it), at that signal transitions are detected if twoconsecutive samples show different levels. Thus, only the current level of an input signalat these sample points is relevant, that means, the necessary rise/fall times of the inputsignal is only dependant on the sample rate, that is the distance in time between twoconsecutive evaluation time points. If an input signal, for instance, is sampled throughsoftware every 10us, it is irrelevant, which input level would be seen between thesamples. Thus, it would be allowable for the signal to take 10us to pass through theundefined area. Due to the sample rate of 10us, it is assured that only one sample canoccur while the signal is within the undefined area, and no incorrect transition will bedetected. For inputs which are connected to a peripheral function, e.g. capture inputs, thesample rate is determined by the clock cycle of the peripheral unit. In the case of theCAPCOM unit this means a sample rate of 400ns @ 20MHz CPU clock. This requiresinput signals to pass through the undefined area within these 400ns in order to avoidmultiple capture events.For input signals, which do not provide the required rise/fall times, external circuitry mustbe used to shape the signal transitions.In the attached diagram, the effect of the sample rate is shown. The numbers 1 to 5 in thediagram represent possible sample points. Waveform a) shows the result if the inputsignal transition time through the undefined TTL-level area is less than the time distancebetween the sample points (sampling at 1, 2, 3, and 4). Waveform b) can be the result ifthe sampling is performed more than once within the undefined area (sampling at 1, 2, 5,3, and 4).Sample points:1. Evaluation of the signal clearly results in a low level2. Either a low or a high level can be sampled here. If low is sampled, no transition willbe detected. If the sample results in a high level, a transition is detected, and anappropriate action (e.g. capture) might take place.3. Evaluation here clearly results in a high level. If the previous sample 2) had alreadydetected a high, there is no change. If the previous sample 2) showed a low, atransition from low to high is detected now.
上传时间： 2013-10-23
上传用户：copu
matlab雨流算法。The rain flow algorithm code has been prepared according to the ASTM standard (Standard practices for cycle counting in fatigue analysis) and optimized considering the calculation time.
标签： algorithm according Standard prepared
上传时间： 2016-02-07
上传用户：上善若水
WIRELESS SENSOR NETWORKS Environmental Sensor Application of Rain Collector II with CrossBow Technology
标签： Environmental Application Collector WIRELESS
上传时间： 2014-01-27
上传用户：稀世之宝039
MIT开放课件 6.856J / 18.416J Randomized Algorithms Fall 2002
标签： Algorithms Randomized 18.416 6.856
上传时间： 2016-09-02
上传用户：lijianyu172
MIT Course\6.003 Signals and Systems, Fall 2003.rar MIT 开源课件，信号与系统
标签： MIT Signals Systems Course
上传时间： 2013-12-31
上传用户：qoovoop
Rijndael（读作rain-dahl）是由美国国家标准与技术协会（NIST）所选的高级加密标准（AES）的候选算法。它是从最后的5个候选方案中选出的，而这5个候选方案又是从刚开始的15个算法中选出的。今后的几年内，在许多密码术的应用中Rijndael将逐步取代数据加密标准（DES）以及后来的Triple DES。
标签： rain-dahl Rijndael NIST AES
上传时间： 2014-01-09
上传用户：xieguodong1234
下雨实例rain Flash Samplerain Flash Sample
标签： Flash Samplerain Sample rain
上传时间： 2017-03-02
上传用户：himbly
Drop fall algorithm used to segmentate digits
标签： segmentate algorithm digits Drop
上传时间： 2014-01-13
上传用户：lijianyu172
This is balance and fall article. It will be helpful for motor behavior and rehabilitation study.
标签： rehabilitation and behavior balance
上传时间： 2017-07-18
上传用户：xuanjie
