數(shù)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(shù)字溫度傳感器</p><p>　　隨著科

42、學(xué)技術(shù)的不斷進(jìn)步和發(fā)展，溫度傳感器的種類(lèi)日益繁多，應(yīng)用逐漸廣泛，并且開(kāi)始由模擬式向著數(shù)字式、單總線(xiàn)式、雙總線(xiàn)式和三總線(xiàn)式發(fā)展。而數(shù)字溫度傳感器更因適用于各種微處理器接口組成的自動(dòng)溫度控制系統(tǒng)具有可以克服模擬傳感器與微處理器接口時(shí)需要信號(hào)調(diào)理電路和A/D轉(zhuǎn)換器的弊端等優(yōu)點(diǎn)，被廣泛應(yīng)用于工業(yè)控制、電子測(cè)溫計(jì)、醫(yī)療儀器等各種溫度控制系統(tǒng)中。其中，比較有代表性的數(shù)字溫度傳感器有DS18B20、MAX6575、DS1722、MAX6636等。本文

43、主要介紹了數(shù)字溫度傳感器DS1722的特性、使用方法以及它的時(shí)序、內(nèi)部結(jié)構(gòu)等相關(guān)內(nèi)容。</p><p><b>　　特點(diǎn)：</b></p><p>　　溫度測(cè)量無(wú)需外部元件。</p><p>　　測(cè)量溫度范圍從-55℃至+120℃，華氏等量溫度為-67℉248℉。</p><p>　　溫度測(cè)量精度為±2.0℃

44、。</p><p>　　溫度測(cè)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(shù)據(jù)讀寫(xiě)接口方式可以是Motorola串行外設(shè)接口或三線(xiàn)串行接口。</p><p>　　模擬電源電壓范圍(2.65V到5.5V )。</p><p>　　單獨(dú)的邏輯數(shù)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(shí)鐘線(xiàn)</p><p><b>　　GND-地</b></p><p>　　VDDA-模擬電源電壓</p><p>　　SDO-串行數(shù)據(jù)輸出</p><p>　　SDI-串行數(shù)據(jù)輸入</p><p>　　VDDD-數(shù)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(xiàn)接口的DS1722數(shù)字溫度傳感器是一個(gè)可以對(duì)溫度進(jìn)行讀取的裝置。對(duì)溫度測(cè)量不需要外部元件輔助，它是一個(gè)真正的溫度-數(shù)字轉(zhuǎn)換器。溫度數(shù)據(jù)通信通過(guò)DS1722 的Motorola SPI 接口或者一個(gè)標(biāo)準(zhǔn)三總線(xiàn) 串行接口來(lái)實(shí)現(xiàn)。接口標(biāo)準(zhǔn)選擇由用戶(hù)自己來(lái)決定。</p><

48、p>　　應(yīng)用中，如要求更大溫度分辨率，用戶(hù)可以調(diào)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(yīng)用。應(yīng)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(gè)單獨(dú)的數(shù)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(yīng)用領(lǐng)域可以涉及到個(gè)人計(jì)算機(jī)/服務(wù)

49、器/工作組，單元電話(huà)，辦公設(shè)備，或任何熱敏感系統(tǒng)。</p><p><b>　　概況：</b></p><p>　　DS1722的內(nèi)部結(jié)構(gòu)方框圖如圖2所示：</p><p>　　圖2 內(nèi)部結(jié)構(gòu)方框圖</p><p>　　數(shù)字溫度傳感器DS1722由四個(gè)主要部分成：</p><p><b&g

50、t;　　精密溫度傳感器。</b></p><p><b>　　模數(shù)轉(zhuǎn)換器。</b></p><p>　　SPI/三線(xiàn)接口電子器件。</p><p><b>　　數(shù)據(jù)寄存器。</b></p><p>　　這種溫度傳感器無(wú)需外部元件.開(kāi)始供電時(shí)，DS1722處于能量關(guān)閉狀態(tài)，供電之后，用戶(hù)通

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

52、。在應(yīng)用中，小增量溫度變化是至關(guān)重要的， 用戶(hù)可以通過(guò)改變分辨率寄存器來(lái)實(shí)現(xiàn)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(guò)程序配置寄存器來(lái)完成。但每增加一位大約增加一倍的轉(zhuǎn)換時(shí)間。</p><p>　　DS1722有摩托羅拉串行接口和標(biāo)準(zhǔn)三線(xiàn)接口兩種通信接口，用戶(hù)可以通過(guò)SERMODE管腳來(lái)選擇通信標(biāo)準(zhǔn)，SERMODE管腳接VDDD為SPI接口，SERMODE管腳接地為標(biāo)準(zhǔn)三線(xiàn)接口。該

53、裝置包含一個(gè)模擬電源電壓和一個(gè)數(shù)字電源電壓( 即：VDDA和VDDD)，模擬電源電壓供給裝置的運(yùn)行，而數(shù)字電源電壓供應(yīng)數(shù)字輸入和輸出.DS1722是為1.8V邏輯電壓而設(shè)計(jì)準(zhǔn)備的。</p><p><b>　　溫度測(cè)量操作：</b></p><p>　　DS1722 功能核心是它是以直接數(shù)字式溫度傳感器來(lái)工作的。DS1722 溫度測(cè)量通過(guò)一個(gè)芯片溫度測(cè)量技術(shù)來(lái)實(shí)現(xiàn)，測(cè)

54、量范圍從-55℃到+120℃。該裝置在供電前處于待機(jī)模式，在供電后，DS1722可可能會(huì)被置于續(xù)轉(zhuǎn)換模式或單一轉(zhuǎn)換模式。在連續(xù)轉(zhuǎn)換模式狀態(tài)下，該裝置連續(xù)計(jì)算溫度并把測(cè)溫?cái)?shù)據(jù)的最新結(jié)果存儲(chǔ)在溫度寄存器的地址位01H（LSB）和02H（MSB）；在單一轉(zhuǎn)換模式狀態(tài)下，DS1722執(zhí)行一次溫度轉(zhuǎn)換，結(jié)果存于溫度寄存器中，然后回到關(guān)閉模式。關(guān)于詳細(xì)介紹在供殿后如何更改設(shè)置包含在“編程操作”部分。</p><p>　　溫度

55、轉(zhuǎn)換分辨率配置可以分為（8，9，10，11，12位），且在默認(rèn)狀態(tài)下為9位；其對(duì)應(yīng)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(zhuǎn)換后以二進(jìn)制的補(bǔ)碼格式存儲(chǔ)于溫度寄存器中，通過(guò)SPI或者三線(xiàn)接口，溫度寄存器中的地址01H（LSB）和02H（MSB）中的數(shù)據(jù)可以被讀出來(lái)，表2描述了輸出的數(shù)據(jù)與被測(cè)量的溫度的確切關(guān)系，表中假設(shè)DS1722配置

56、為12位分辨率；如果設(shè)備被配置在一個(gè)低分辨率方式下，那些位將包含0s。數(shù)據(jù)通過(guò)數(shù)字接口連續(xù)傳送，MSB首先通過(guò)SPI傳輸，LSB首先通過(guò)三線(xiàn)傳輸。溫度寄存器器的MSB包含“標(biāo)志”(s)位，表示溫度是正值或負(fù)值。若為華氏用法，必須使用查表或轉(zhuǎn)換規(guī)則。</p><p>　　表2 溫度與地址數(shù)據(jù)格式關(guān)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(xiàn)通信接口通過(guò)選擇狀態(tài)寄存器位置適合的地址來(lái)完成。表3為寄存器的地址表格，說(shuō)明了DS1722有兩個(gè)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(nèi)獲取地址，以地址00h為讀操作，并且以地址80h為寫(xiě)操作。從狀態(tài)寄存器里讀寫(xiě)數(shù)據(jù)時(shí)，MSB首先通過(guò)SPI傳輸，LSB首先通過(guò)三線(xiàn)傳輸。寄存器的格式說(shuō)明見(jiàn)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(guān)，因整個(gè)寄存

59、器在工作前是未知的，因此它被置于默認(rèn)狀態(tài)。</p><p>　　1SHOT是單位溫度轉(zhuǎn)換位。如果SD位為“1”，則連續(xù)的溫度轉(zhuǎn)換不發(fā)生，1SHOT位寫(xiě)入“1”時(shí)，DS1722執(zhí)行一次溫度轉(zhuǎn)換并且把結(jié)果存在溫度寄存器的地址位的01H（LSB）和02H（MSB）中，完成溫度轉(zhuǎn)換后1SHOT將會(huì)自動(dòng)清“0”。用戶(hù)得以進(jìn)入對(duì)1SHOT位的讀寫(xiě)，雖然也給這位寫(xiě)，如果SD位是“0”，本次讀寫(xiě)數(shù)據(jù)將被忽略 (連續(xù)的轉(zhuǎn)換方式)，

60、但用戶(hù)還是對(duì)這一位有讀/寫(xiě)訪(fǎng)問(wèn)權(quán)限 。傳感器上電時(shí)默認(rèn)1SHOT位“0”。</p><p>　　R0， R1，R2為溫度分辨率位，下面表4 定義了數(shù)字式溫度傳感器的配置， 根據(jù)這3位對(duì)其進(jìn)行設(shè)置。依照對(duì)其AC 電子特征的描述，此三位設(shè)置和轉(zhuǎn)換時(shí)間之間有一種直接的聯(lián)系。用戶(hù)可以讀寫(xiě)訪(fǎng)問(wèn)R2，R1，和R0位，上電默認(rèn)狀態(tài)時(shí)R2為“0”，R1為“0”，R0為“1”（9位轉(zhuǎn)換）。</p><p>

61、;　　表4 數(shù)字式溫度傳感器的配置</p><p>　　SD是關(guān)閉斷路位。如果SD位為“0”，則進(jìn)入連續(xù)轉(zhuǎn)換模式，DS1722將連續(xù)執(zhí)行溫度轉(zhuǎn)換并將全部的結(jié)果存入溫度寄存器中。如果SD位由“0”便為“1”，進(jìn)行中的數(shù)據(jù)轉(zhuǎn)換將繼續(xù)進(jìn)行直至完成并且儲(chǔ)存結(jié)果，然后裝置將進(jìn)入到一個(gè)低功率關(guān)閉模式。此時(shí)，通信口保持有效，用戶(hù)對(duì)SD位有讀/寫(xiě)訪(fǎng)問(wèn)權(quán)限，并且默認(rèn)值是“1”（關(guān)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(gè)串行接口模式之間做出選擇，DS1722可以用SPI接口或者標(biāo)準(zhǔn)的三總線(xiàn)接口進(jìn)行數(shù)據(jù)通信，它的接口方式由管腳SERMODE決定，當(dāng)SERMODE管腳與VDDD相接時(shí)，SPI接口通信方式被選通；當(dāng)SERMODE管腳與地相接時(shí)，標(biāo)準(zhǔn)三總線(xiàn)接口通信方式被選通。</p><p>　　串行外設(shè)接

63、口(SPI)：</p><p>　　串行外設(shè)接口(SPI)是一種同步總線(xiàn)地址和數(shù)據(jù)傳輸接口。它的選擇是SERMODE管腳接VDDD管腳。有四個(gè)管腳用于實(shí)現(xiàn)SPI接口技術(shù)，這四個(gè)管腳分別是SDO(串行數(shù)據(jù)輸出)，SDI(串行數(shù)據(jù)輸入)，CE(芯片使能)，SCLK(串行時(shí)鐘）。DS1722芯片是一簡(jiǎn)單設(shè)備在SPI接口技術(shù)上的一種應(yīng)用，微型控制器是系統(tǒng)的核心。</p><p>　　SDI和SDO

64、管腳是DS1722的數(shù)據(jù)輸入和輸出管腳，CE管腳是用來(lái)啟動(dòng)和終止數(shù)據(jù)傳輸，SCLK管腳用來(lái)保證核心裝置（微型控制器）與下位設(shè)備（DS1722）之間的數(shù)據(jù)的同步傳輸。轉(zhuǎn)移時(shí)鐘(SCLK)，它是由單片機(jī)微控器產(chǎn)生，為高電平時(shí)，當(dāng)CE管腳為高電平，而且在處理和數(shù)據(jù)傳輸數(shù)據(jù)到任何設(shè)備的SPI總線(xiàn)期，SCLK才處于繁忙狀態(tài)。而SCLK處于閑置狀態(tài)時(shí)則可以對(duì)某些微控制器進(jìn)行編程操作。DS1722提供了一個(gè)重要特點(diǎn)，當(dāng)CE繁忙時(shí)，某一級(jí)的閑置時(shí)鐘由采

65、樣時(shí)鐘決定。因此，SCLK的極性是可以兼容的且在一個(gè)時(shí)鐘周期內(nèi)，以比特?cái)?shù)據(jù)為單位傳送，8位地址位和數(shù)據(jù)位在同一時(shí)鐘周期內(nèi)傳送，MSB內(nèi)數(shù)據(jù)首先傳送。</p><p><b>　　標(biāo)準(zhǔn)三線(xiàn)數(shù)據(jù)總線(xiàn)：</b></p><p>　　三總線(xiàn)通信方式操作方式與SPI總線(xiàn)方式相似。但是，在三總線(xiàn)方式下，有一雙向I/O接口代替單獨(dú)的數(shù)據(jù)輸入和數(shù)據(jù)輸出信號(hào)。三總線(xiàn)通信包括I/O接口(