【正文】 external use. Simulation parator can pare two simulation, if the size of the voltage external A D/A converter and its output as A parator analog input, and by simulating the parator another input voltage to be measured, through the introduction of the software method can realize the A/D conversion. Flash memory AT89C2051) Provide a 2KB of singlechip AT89C2051 in Flash memory chips, which allows the online program to modify or use special programming programming. (1)Flash memory encryption AT89C2051 SCM has 2 encryption, can programming (P) or programming (U) to obtain different encryption functionality. Encryption functionality table as shown in table 11. Table 11 LB1 LB2 Encryption functionality U U No encryption functionality P U Prohibit to flash to programming P P Prohibit to flash to programming， Also banned program 外文翻譯 9 Encrypt a content erased only through chips to erase operation. (2)Flash memory programming and procedures， the piece inside chip AT89C2051 Flash memory programming. Note: counters RESET at an EPROM inside the rising edge, and 000H RESET to XTAL1 by foot is executed, pulse count. of 10ms to erase PROG pulse. the programming pulled low RDY/BSY instructions. (3).A T89C2051 SCM in Flash memory chips programming steps are as follows: the sequence is the VCC GND pin, add working voltage, XTAL1 pin RESET, receiving GND pin, other than the above time, waiting for 10ms. pin RESET, heightening level. , , , pin。s instructions. Finished the advantages of infrared receiving head is not in need of sophisticated debugging and shell screen, use rise as a transistor, very convenient. But when used in the infrared receiving attention finished first carrier frequency. Infrared remote mon carrier frequency for 38kHz, this is transmitted by using 455kHz Tao Zhen to decide. At the launch of crystals were integer frequency, frequency coefficients, so monly 12, so 455kHz 247。 畢業(yè)設(shè)計 (論文 ) 外文翻譯 專 業(yè) ： 電氣工程及其自動化 姓 名： 曲雪 班 級： 電自 0841 學 號： 10 號 指導教師 : 劉君義 職 稱： 教 授 2021 年 5 月 外文翻譯 1 Infrared Remote And Chips Are Introduced People39。s eyes can see the visible wavelength from long to short according to the arrangement, in order to red, orange, yellow, green, green, blue, violet. One of the red wavelengths for ~ mount, Purple is wavelength range ~ mount. Purple is shorter than the wavelength of light called ultraviolet ray, red wavelengths of light is longer than that of infrared light. Infrared remote control is to use wavelength for ~ mount between the near infrared to transfer control signal. Commonly used infrared remote control system of general points transmit and receive two parts. The main ponent part for the launch of infrared light emitting diode. It is actually a special light emitting diode, due to its internal material differs from ordinary light emitting diode, resulting in its ends on certain voltage, it is a rather infrared light. Use of infrared light emitting diode the infrared wavelengths, for 940nm appearance and ordinary, just the same light emitting diode five different colors. Infrared light emitting diode generally have black and blue, transparent three colors. Judgment of infrared light emitting diode and judgment method, using a millimeter to ordinary diode electric block measure of infrared light emitting diode, reverse resistance. The infrared light emitting diode luminescence efficiency to use special instrument to measure precise, and use only spare conditions to pull away from roughly judgment. Receiving part of infrared receiving tube is a photosensitive diode. In actual application of it receiving diode to reverse bias, it 外文翻譯 2 can work normally, ., the infrared receiving circuit application in diode is used to reverse, higher sensitivity. Infrared receiving diode usually have two round and rectangular. Due to the power of infrared light emitting diode (or less monly 100mW), so ir receiving diode received signals