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主要介紹了以PIC18F2480單片機為處理器，基于可編程多路開關檢測接口器件MC33993實現的車用多路開關檢測接口電路的設計。該設計克服了以往基于分立元件的檢測接口電路的弊端，簡化了接口電路設計，保證了車用開關工作的可靠性和安全性。 Abstract: The design of automotive multiple switch detection interface circuit based on MC33993 is introduced mainly which adopts PIC18F2480 single chip microprocessor.This circuit overcomes shortage of traditional design which contains many schism elements, and the application of MC33993 also predigests the whole design of interface circuit and guarantees the dependability and security of the switch.
上傳時間： 2013-11-19
上傳用戶：star_in_rain
主要介紹構成記憶示波器的STC12C5408AD增強型單片機8通道10位模數轉換功能的設置、應用和具體的匯編程序設計，以及PC機串行通訊和圖形顯示的高速匯編程序的設計要點，并列舉實例說明其應用效果。 Abstract: The configuration, applications and the designs for? compiling program of the memorial oscillograph of 10 bits A/D conversation are introduced. It’s bases on STC12C5408AD 8? channels? single-chip? computer? in? enhancement? mode. It also recommends the devising essentials of high speed compiling program for PC serial communication and graphics display, lists examples to explain its effects in using.
上傳時間： 2013-10-10
上傳用戶：adada
基于幅移鍵控技術ASK（Amplitude-Shift Keying），以C8051F340單片機作為監測終端控制器，C8051F330D單片機作為探測節點控制器，采用半雙工的通信方式，通過監控終端和探測節點的無線收發電路，實現數據的雙向無線傳輸。收發電路采用直徑為0.8 mm的漆包線自行繞制成圓形空心線圈天線，天線直徑為（3.4±0.3）cm。試驗表明，探測節點與監測終端的通信距離為24 cm，通過橋接方式，節點收發功率為102 mW時，節點間的通信距離可達20 cm。與傳統無線收發模塊相比，該無線收發電路在受體積、功耗、成本限制的場合有廣闊的應用前景。 Abstract: Based on ASK technology and with the C8051F340 and C8051F330D MCU as the controller， using half-duplex communication mode， this paper achieves bi-directional data transfer. Transceiver circuit constituted by enameled wire which diameter is 0.8mm and wound into a diameter （3.4±0.3） cm circular hollow coil antenna. Tests show that the communication distance between detection and monitoring of the terminal is 24cm，the distance is up to 20cm between two nodes when using the manner of bridging and the node transceiver power is 102mW. Compared with the conventional wireless transceiver modules， the circuit has wide application prospect in small size， low cost and low power consumption and other characteristics.
上傳時間： 2013-10-19
上傳用戶：xz85592677
將現行的供暖計費方式由按建筑面積計費變為按消耗的熱能計費是供暖計費方式發展趨勢，為了滿足這一計費方式變化的需要，設計了基于IC卡的預付費式新型供暖計費系統，通過測量用戶采暖系統進出口的溫度和流量，計算用戶消耗的熱能，利用IC卡記錄用戶預付費的金額和當年熱能的單價，根據熱能消耗和當年熱能的單價計算用戶采暖費，根據實際發生的供暖費用和預付費金額控制供暖的開停，這一計費方式的變化使供暖計費更趨合理。 Abstract: It is trend that the mode of heat charging is changed from billing by building area to by thermal energy. In order to meet the needs of heat charging mode changing， a new system of heat charging based on IC card is proposed. The user?蒺s energy consumption is calculated by measuring the user inlet and outlet temperature and flow，using the IC card to record the prepaid amount and the current price of heat. The user?蒺s heating costs is calculated according to energy consumption and current price， according to actual heating costs and prepaid amount，the system controls the heating opening or stopping. It is more reasonable that calculated heating costs by user heat consumption
上傳時間： 2013-10-14
上傳用戶：大融融rr
The SN65LBC170 and SN75LBC170 aremonolithic integrated circuits designed forbidirectional data communication on multipointbus-transmission lines. Potential applicationsinclude serial or parallel data transmission, cabledperipheral buses with twin axial, ribbon, ortwisted-pair cabling. These devices are suitablefor FAST-20 SCSI and can transmit or receivedata pulses as short as 25 ns, with skew lessthan 3 ns.These devices combine three 3-state differentialline drivers and three differential input linereceivers, all of which operate from a single 5-Vpower supply.The driver differential outputs and the receiverdifferential inputs are connected internally to formthree differential input/output (I/O) bus ports thatare designed to offer minimum loading to the buswhenever the driver is disabled or VCC = 0. Theseports feature a wide common-mode voltage rangemaking the device suitable for party-lineapplications over long cable runs.
上傳時間： 2013-10-13
上傳用戶：ytulpx
LM3S系列單片機主要有3種工作模式：運行模式（Run-Mode）、睡眠模式（Sleep-Mode）、深度睡眠模式（Deep-Sleep-Mode）。某些型號還具有單獨的極為省電的冬眠模塊（Hibernation Module）。而對各個模式下的外設時鐘選通以及系統時鐘源的控制主要由表 2.1中的寄存器來完成。 運行模式是正常的工作模式，處理器內核將積極地執行代碼。在睡眠模式下，系統時鐘不變，但處理器內核不再執行代碼（內核因不需要時鐘而省電）。在深度睡眠模式下，系統時鐘可變，處理器內核同樣也不再執行代碼。深度睡眠模式比睡眠模式更為省電。有關這3種工作模式的具體區別請參見表 2.2的描述。調用函數SysCtlSleep( )可使處理器立即進入睡眠模式，而調用函數SysCtlDeepSleep( )可使處理器立即進入深度睡眠模式。任一中斷都可以將處理器從睡眠或深度睡眠模式喚醒，并使處理器恢復到睡眠前的運行狀態。因此在進入睡眠或深度睡眠之前，必須配置某個片內外設的中斷并允許其在睡眠或深度睡眠模式下繼續工作，如果不這樣，則只有復位或重新上電才能結束睡眠或深度睡眠狀態。
上傳時間： 2013-11-08
上傳用戶：ArmKing88
Features• Complete DTMF Receiver• Low power consumption• Internal gain setting amplifier• Adjustable guard time• Central office quality• Power-down mode• Inhibit mode• Backward compatible withMT8870C/MT8870C-1Applications• Receiver system for British Telecom (BT) orCEPT Spec (MT8870D-1)• Paging systems• Repeater systems/mobile radio• Credit card systems• Remote control• Personal computers• Telephone answering machine
上傳時間： 2013-11-20
上傳用戶：mpquest
HT45R35在觸控按鍵中的應用(使用C語言) HT45R35 Demo Board包含12個Touch Switch，這是一種電容式的非接觸式觸摸按鍵，它可以用來取代任何的機械式按鍵。由于C語言具有良好的可讀性、可移植性等優點，本文將介紹如何使用Holtek C語言來完成HT45R35 12Key Touch Switch Demo Board的軟件設計.
上傳時間： 2013-10-10
上傳用戶：bjgaofei
HT45R38在觸摸按鍵式電子時鐘中的應用 HT45R38可用來開發觸摸按鍵式電子時鐘，這是因為HT45R38提供了12個Touch Switch提供了5個信道的ADC及兩信道的PWM輸出。
上傳時間： 2013-11-24
上傳用戶：jelenecheung
HT45R34在12KEY觸摸按鍵中的應用(使用C語言) 本文中我們介紹如何利用我們Holtek C語言來完成HT45R34 12Key Touch Switch Demo board的軟件設計。
上傳時間： 2013-12-22
上傳用戶：han_zh
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