數字溫度傳感器畢業(yè)論文中英文資料外文翻譯

1、<p><b>　　中文3340字</b></p><p><b>　　外文資料</b></p><p>　　DS1722 Digital Thermometer</p><p>　　With scientific and technological progress and development of the

2、 types of temperature sensors increasingly wide range of application of the increasingly widespread, and the beginning analog toward digital, single-bus, dual-bus and bus-3 direction. And the number of temperature sensor

3、s because they apply to all microprocessor interface consisting of automatic temperature control system simulation can be overcome sensor and microprocessor interface need signal conditioning circuit and A / D conve</

4、p><p><b>　　FEATURES:</b></p><p>　　Temperature measurements require no external components;</p><p>　　Measures temperatures from -55°C to +120°C. Fahrenheit equival

5、ent is -67°F to +248°F;</p><p>　　Thermometer accuracy is ±2.0°C;</p><p>　　Thermometer resolution is configurable from 8 to 12 bits (1.0°C to 0.0625°C　resolution);&l

6、t;/p><p>　　Data is read from/written to via a Motorola Serial Peripheral Interface (SPI) or standard 3-wire serial interface;</p><p>　　Wide analog power supply range (2.65V - 5.5V);</p><

7、;p>　　Separate digital supply allows for 1.8V logic;</p><p>　　Available in an 8-pin SOIC (150 mil), 8-pin USOP, and flip chip package;</p><p>　　PIN ASSIGNMENT</p><p>　　FIGURE 1 P

8、IN ASSIGNMENT</p><p>　　PIN DESCRIPTION:</p><p>　　SERMODE - Serial Interface Mode.</p><p>　　CE - Chip Enable.</p><p>　　SCLK - Serial Clock.</p><p>　　GND – G

9、round.</p><p>　　VDDA - Analog Supply Voltage.</p><p>　　SDO - Serial Data Out.</p><p>　　SDI - Serial Data In.</p><p>　　VDDD - Digital Supply Voltage.</p><p>

10、;　　DESCRIPTION:</p><p>　　The DS1722 Digital Thermometer and Thermostat with SPI/3-Wire Interface provides temperature readings which indicate the temperature of the device. No additional components are requi

11、red; the device is truly a temperature-to-digital converter. Temperature readings are communicated from the DS1722 over a Motorola SPI interface or a standard 3-wire serial interface. The choice of interface standard is

12、selectable by the user. For applications that require greater temperature resolution, the user can</p><p>　　For application flexibility, the DS1722 features a wide analog supply rail of 2.65V - 5.5V. A separ

13、ate digital supply allows a range of 1.8V to 5.5V. The DS1722 is available in an 8-pin SOIC (150-mil), 8-pin USOP, and flip chip package.</p><p>　　Applications for the DS1722 include personal computers/ser

14、vers/workstations, cellular telephones, office equipment, or any thermally-sensitive system.</p><p><b>　　OVERVIEW:</b></p><p>　　A block diagram of the DS1722 is shown in Figure 2. Th

15、e DS1722 consists of four major components:</p><p>　　1. Precision temperature sensor.</p><p>　　2. Analog-to-digital converter.</p><p>　　3. SPI/3-wire interface electronics.</p>

16、;<p>　　4. Data registers.</p><p>　　The factory-calibrated temperature sensor requires no external components. The DS1722 is in a power conserving shutdown state upon power-up. After power-up, the user

17、 may alter the configuration register to place the device in a continuous temperature conversion mode or in a one-shot conversion mode. In the continuous conversion mode, the DS1722 continuously converts the temperature

18、and stores the result in the temperature register. As conversions are performed in the background, reading the temp</p><p>　　DS1722 FUNCTIONAL BLOCK DIAGRAM Figure 2</p><p>　　OPERATION-Measuring

19、 Temperature:</p><p>　　The core of DS1722 functionality is its direct-to-digital temperature sensor. The DS1722 measures temperature through the use of an on-chip temperature measurement technique with an op

20、erating range from -55°　to +120°C. The device powers up in a power-conserving shutdown mode. After power-up, the DS1722 may be placed in a continuous conversion mode or in a one-shot conversion mode. In the con

21、tinuous conversion mode, the device continuously computes the temperature and stores the most recent resul</p><p><b>　　Address</b></p><p><b>　　Location</b></p><

22、;p>　　MSB (unit = ?℃) LSB</p><p>　　OPERATION-Programming:</p><p>　　The area of interest in programming the DS1722 is the Configuration register. All programm

23、ing is done via the SPI or 3-wire communication interface by selecting the appropriate address of the desired register location. Table 3 illustrates the addresses for the two registers (configuration and temperature) of

24、the DS1722.</p><p>　　Register Address Structure Table 3</p><p>　　CONFIGURATION REGISTER PROGRAMMING:</p><p>　　The configuration register is accessed in the DS1722 with the 00h addre

25、ss for reads and the 80h address for writes. Data is read from or written to the configuration register MSB first for SPI communication and LSB first for 3-wire communication. The format of the register is illustrated in

26、 Figure 2. The effect each bit has on DS1722 functionality is described below along with the power-up state of the bit. The entire register is volatile, and thus it will power-up in the default state.</p><p>

27、;　　CONFIGURATION/STATUS REGISTER Figure 2</p><p>　　1SHOT = One-shot temperature conversion bit. If the SD bit is "1", (continuous temperature conversions are not taking place), a "1" writ

28、ten to the 1SHOT bit will cause the DS1722 to perform one temperature conversion and store the results in the temperature register at addresses 01h (LSB) and 02h (MSB). The bit will clear itself to "0" upon com

29、pletion of the temperature conversion. The user has read/write access to the 1SHOT bit, although writes to this bit will be ignored if the SD bit is a "0"</p><p>　　R0, R1, R2 = Thermometer resoluti

30、on bits. Table 4 below defines the resolution of the digital thermometer, based on the settings of these 3 bits. There is a direct tradeoff between resolution and conversion time, as depicted in the AC Electrical Charact

31、eristics. The user has read/write access to the R2, R1 and R0 bits and the power-up default state is R2="0", R1="0", and R0="1" (9-bit conversions).</p><p>　　THERMOMETER RESOLUT

32、ION CONFIGURATION Table 4</p><p>　　SD = Shutdown bit. If SD is "0", the DS1722 will continuously perform temperature conversions and store the last completed result in the temperature register. If

33、SD is changed to a "1", the conversion in progress will be completed and stored and then the device will revert to a low-power shutdown mode. The communication port remains active. The user has read/write acces

34、s to the SD bit and the power-up default is "1" (shutdown mode).</p><p>　　SERIAL INTERFACE:</p><p>　　The DS1722 offers the flexibility to choose between two serial interface modes. The

35、 DS1722 can communicate with the SPI interface or with a standard 3-wire interface. The interface method used is determined by the SERMODE pin. When this pin is connected to VDDD SPI communication is selected. When this

36、pin is connected to ground, standard 3-wire communication is selected.</p><p>　　SERIAL PERIPHERAL INTERFACE (SPI):</p><p>　　The serial peripheral interface (SPI) is a synchronous bus for address

37、 and data transfer. The SPI mode of serial communication is selected by tying the SERMODE pin to VDDD. Four pins are used for the SPI. The four pins are the SDO (Serial Data Out), SDI (Serial Data In), CE (Chip Enable),

38、and SCLK (Serial Clock). The DS1722 is the slave device in an SPI application, with the microcontroller being the master. The SDI and SDO pins are the serial data input and output pins for the DS1722, respect</p>

39、<p>　　3-WIRE SERIAL DATA BUS:</p><p>　　The 3-wire communication mode operates similar to the SPI mode. However, in 3-wire mode, there is one bi-directional I/O instead of separate data in and data out

40、 signals. The 3-wire consists of the I/O (SDI and SDO pins tied together), CE, and SCLK pins. In 3-wire mode, each byte is shifted in LSB first unlike SPI mode where each byte is shifted in MSB first. As is the case with

41、 the SPI mode, an address byte is written to the device followed by a single data byte or multiple data bytes.</p><p><b>　　外文資料譯文</b></p><p>　　DS1722數字溫度傳感器</p><p>　　隨著科

42、學技術的不斷進步和發(fā)展，溫度傳感器的種類日益繁多，應用逐漸廣泛，并且開始由模擬式向著數字式、單總線式、雙總線式和三總線式發(fā)展。而數字溫度傳感器更因適用于各種微處理器接口組成的自動溫度控制系統具有可以克服模擬傳感器與微處理器接口時需要信號調理電路和A/D轉換器的弊端等優(yōu)點，被廣泛應用于工業(yè)控制、電子測溫計、醫(yī)療儀器等各種溫度控制系統中。其中，比較有代表性的數字溫度傳感器有DS18B20、MAX6575、DS1722、MAX6636等。本文

43、主要介紹了數字溫度傳感器DS1722的特性、使用方法以及它的時序、內部結構等相關內容。</p><p><b>　　特點：</b></p><p>　　溫度測量無需外部元件。</p><p>　　測量溫度范圍從-55℃至+120℃，華氏等量溫度為-67℉248℉。</p><p>　　溫度測量精度為±2.0℃

44、。</p><p>　　溫度測量配置可為8位至12位分辨率(即1.0℃至0.0625℃分辨率)。</p><p>　　數據讀寫接口方式可以是Motorola串行外設接口或三線串行接口。</p><p>　　模擬電源電壓范圍(2.65V到5.5V )。</p><p>　　單獨的邏輯數字電壓允許在1.8V。</p><p&g

45、t;　　具有8管腳SOIC(150 mil )封裝和8管腳USOP封裝兩種封裝形式。</p><p><b>　　圖1 管腳圖</b></p><p><b>　　管腳描述：</b></p><p>　　SERMODE-串行接口模式</p><p><b>　　CE-芯片使能</b

46、></p><p>　　SCLK-串行時鐘線</p><p><b>　　GND-地</b></p><p>　　VDDA-模擬電源電壓</p><p>　　SDO-串行數據輸出</p><p>　　SDI-串行數據輸入</p><p>　　VDDD-數字電源電壓&l

47、t;/p><p><b>　　描述：</b></p><p>　　具有SPI接口和三總線接口的DS1722數字溫度傳感器是一個可以對溫度進行讀取的裝置。對溫度測量不需要外部元件輔助，它是一個真正的溫度-數字轉換器。溫度數據通信通過DS1722 的Motorola SPI 接口或者一個標準三總線 串行接口來實現。接口標準選擇由用戶自己來決定。</p><

48、p>　　應用中，如要求更大溫度分辨率，用戶可以調整分辨率從8位至12位。在必須迅速偵查到熱失控的情況下，這是特別方便的應用。應用的靈活性，DS1722芯片的模擬供電電壓范圍為2.65V到5.5V，而一個單獨的數字電壓供電允許范圍為1.8V至5.5V。 DS1722具有8管腳SOIC(150 MIL )封裝和8管腳USOP封裝兩種封裝形式。</p><p>　　DS1722的應用領域可以涉及到個人計算機/服務

49、器/工作組，單元電話，辦公設備，或任何熱敏感系統。</p><p><b>　　概況：</b></p><p>　　DS1722的內部結構方框圖如圖2所示：</p><p>　　圖2 內部結構方框圖</p><p>　　數字溫度傳感器DS1722由四個主要部分成：</p><p><b&g

50、t;　　精密溫度傳感器。</b></p><p><b>　　模數轉換器。</b></p><p>　　SPI/三線接口電子器件。</p><p><b>　　數據寄存器。</b></p><p>　　這種溫度傳感器無需外部元件.開始供電時，DS1722處于能量關閉狀態(tài)，供電之后，用戶通

51、過改變寄存器分辨率使其處于連續(xù)轉換溫度模式或者單一溫度轉換模式.連續(xù)轉換模式下，DS1722連續(xù)轉換溫度并將結果存于溫度寄存器中，如同轉換只是一種背景，讀溫度寄存器中的內容不影響其溫度轉換;在單一轉換模式，DS1722執(zhí)行一次溫度轉換，結果存于溫度寄存器中，然后回到關閉模式，這種轉換模式適用于對溫度敏感的應用場合。更多關于配置寄存器的內容包含在“編程操作”部分。</p><p>　　溫度轉換結果的默認分辨率為9位

52、。在應用中，小增量溫度變化是至關重要的， 用戶可以通過改變分辨率寄存器來實現不同的溫度分辨率，從第9位可以改變到8位 、10位、11或12，這些是通過程序配置寄存器來完成。但每增加一位大約增加一倍的轉換時間。</p><p>　　DS1722有摩托羅拉串行接口和標準三線接口兩種通信接口，用戶可以通過SERMODE管腳來選擇通信標準，SERMODE管腳接VDDD為SPI接口，SERMODE管腳接地為標準三線接口。該

53、裝置包含一個模擬電源電壓和一個數字電源電壓( 即：VDDA和VDDD)，模擬電源電壓供給裝置的運行，而數字電源電壓供應數字輸入和輸出.DS1722是為1.8V邏輯電壓而設計準備的。</p><p><b>　　溫度測量操作：</b></p><p>　　DS1722 功能核心是它是以直接數字式溫度傳感器來工作的。DS1722 溫度測量通過一個芯片溫度測量技術來實現，測

54、量范圍從-55℃到+120℃。該裝置在供電前處于待機模式，在供電后，DS1722可可能會被置于續(xù)轉換模式或單一轉換模式。在連續(xù)轉換模式狀態(tài)下，該裝置連續(xù)計算溫度并把測溫數據的最新結果存儲在溫度寄存器的地址位01H（LSB）和02H（MSB）；在單一轉換模式狀態(tài)下，DS1722執(zhí)行一次溫度轉換，結果存于溫度寄存器中，然后回到關閉模式。關于詳細介紹在供殿后如何更改設置包含在“編程操作”部分。</p><p>　　溫度

55、轉換分辨率配置可以分為（8，9，10，11，12位），且在默認狀態(tài)下為9位；其對應分辨率分別為1.0℃，0.5℃，0.25℃，0.125℃，和0.0625℃。</p><p>　　傳感器DS1722將溫度轉換后以二進制的補碼格式存儲于溫度寄存器中，通過SPI或者三線接口，溫度寄存器中的地址01H（LSB）和02H（MSB）中的數據可以被讀出來，表2描述了輸出的數據與被測量的溫度的確切關系，表中假設DS1722配置

56、為12位分辨率；如果設備被配置在一個低分辨率方式下，那些位將包含0s。數據通過數字接口連續(xù)傳送，MSB首先通過SPI傳輸，LSB首先通過三線傳輸。溫度寄存器器的MSB包含“標志”(s)位，表示溫度是正值或負值。若為華氏用法，必須使用查表或轉換規(guī)則。</p><p>　　表2 溫度與地址數據格式關系</p><p>　　MSB (單位為℃)

57、 LSB</p><p><b>　　編程操作：</b></p><p>　　編程操作主要在于規(guī)劃DS1722配置寄存器。DS1722的所有的工作程序由SPI接口或者三總線通信接口通過選擇狀態(tài)寄存器位置適合的地址來完成。表3為寄存器的地址表格，說明了DS1722有兩個寄存器（狀態(tài)和溫度）的地址。</p><p><b>　　

58、表3 寄存器地址</b></p><p><b>　　狀態(tài)寄存器編程：</b></p><p>　　狀態(tài)寄存器在DS1722 內獲取地址，以地址00h為讀操作，并且以地址80h為寫操作。從狀態(tài)寄存器里讀寫數據時，MSB首先通過SPI傳輸，LSB首先通過三線傳輸。寄存器的格式說明見表2。DS1722寄存器的每一位的功能描述都與該位的供電狀態(tài)有關，因整個寄存

59、器在工作前是未知的，因此它被置于默認狀態(tài)。</p><p>　　1SHOT是單位溫度轉換位。如果SD位為“1”，則連續(xù)的溫度轉換不發(fā)生，1SHOT位寫入“1”時，DS1722執(zhí)行一次溫度轉換并且把結果存在溫度寄存器的地址位的01H（LSB）和02H（MSB）中，完成溫度轉換后1SHOT將會自動清“0”。用戶得以進入對1SHOT位的讀寫，雖然也給這位寫，如果SD位是“0”，本次讀寫數據將被忽略 (連續(xù)的轉換方式)，

60、但用戶還是對這一位有讀/寫訪問權限 。傳感器上電時默認1SHOT位“0”。</p><p>　　R0， R1，R2為溫度分辨率位，下面表4 定義了數字式溫度傳感器的配置， 根據這3位對其進行設置。依照對其AC 電子特征的描述，此三位設置和轉換時間之間有一種直接的聯系。用戶可以讀寫訪問R2，R1，和R0位，上電默認狀態(tài)時R2為“0”，R1為“0”，R0為“1”（9位轉換）。</p><p>

61、;　　表4 數字式溫度傳感器的配置</p><p>　　SD是關閉斷路位。如果SD位為“0”，則進入連續(xù)轉換模式，DS1722將連續(xù)執(zhí)行溫度轉換并將全部的結果存入溫度寄存器中。如果SD位由“0”便為“1”，進行中的數據轉換將繼續(xù)進行直至完成并且儲存結果，然后裝置將進入到一個低功率關閉模式。此時，通信口保持有效，用戶對SD位有讀/寫訪問權限，并且默認值是“1”（關閉模式）。</p><p>

62、;<b>　　串行接口：</b></p><p>　　DS1722可以靈活的在它的兩個串行接口模式之間做出選擇，DS1722可以用SPI接口或者標準的三總線接口進行數據通信，它的接口方式由管腳SERMODE決定，當SERMODE管腳與VDDD相接時，SPI接口通信方式被選通；當SERMODE管腳與地相接時，標準三總線接口通信方式被選通。</p><p>　　串行外設接

63、口(SPI)：</p><p>　　串行外設接口(SPI)是一種同步總線地址和數據傳輸接口。它的選擇是SERMODE管腳接VDDD管腳。有四個管腳用于實現SPI接口技術，這四個管腳分別是SDO(串行數據輸出)，SDI(串行數據輸入)，CE(芯片使能)，SCLK(串行時鐘）。DS1722芯片是一簡單設備在SPI接口技術上的一種應用，微型控制器是系統的核心。</p><p>　　SDI和SDO

64、管腳是DS1722的數據輸入和輸出管腳，CE管腳是用來啟動和終止數據傳輸，SCLK管腳用來保證核心裝置（微型控制器）與下位設備（DS1722）之間的數據的同步傳輸。轉移時鐘(SCLK)，它是由單片機微控器產生，為高電平時，當CE管腳為高電平，而且在處理和數據傳輸數據到任何設備的SPI總線期，SCLK才處于繁忙狀態(tài)。而SCLK處于閑置狀態(tài)時則可以對某些微控制器進行編程操作。DS1722提供了一個重要特點，當CE繁忙時，某一級的閑置時鐘由采

65、樣時鐘決定。因此，SCLK的極性是可以兼容的且在一個時鐘周期內，以比特數據為單位傳送，8位地址位和數據位在同一時鐘周期內傳送，MSB內數據首先傳送。</p><p><b>　　標準三線數據總線：</b></p><p>　　三總線通信方式操作方式與SPI總線方式相似。但是，在三總線方式下，有一雙向I/O接口代替單獨的數據輸入和數據輸出信號。三總線通信包括I/O接口(