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參數(shù)資料
| 型號： | DS1615 |
| 元件分類： | 溫度傳感器 |
| 英文描述： | Temperature Recorder |
| 中文描述： | 溫度記錄儀 |
| 文件頁數(shù)： | 16/24頁 |
| 文件大小： | 199K |
| 代理商： | DS1615 |
DS1615
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A second security feature lies in the fact that once the sample rate has been selected by writing to the
Sample Rate register, it cannot be changed to another value without resetting the recorded temperature
data. This prevents gathering many data samples at a fast sample rate and then lowering the sample rate
to give the appearance that the data was recorded over a longer period of time. The Sample Rate register
can only be written to a new value if the MEM CLR bit is set to one.
A third security feature lies in the two integrated sample counters - the Current Samples Counter and the
Total Samples Counter. These two counters can be used to guarantee that the DS1615 data has not been
cleared at any time during a given period of time. The Current Samples Counter counts the number of
samples that have occurred since the most recent data acquisition operation was started (i.e., the number
of samples since the Sample Rate register was written to a non-zero value). The Total Samples Counter
counts the total number of samples that have been recorded in the life of the device (assuming the lithium
energy source has not been removed during that time). If the end user knows the value in the Total
Samples Counter before the data acquisition operation is started, he can guarantee that the DS1615 has
not been cleared. If the Current Samples count equals the difference between the ending value and
beginning value of the Total Samples Counter, then the DS1615 data has not been cleared during that
time frame.
As a fourth security measure, changing any value in the RTC and Control registers (with the exception of
the Status register) will stop datalogging and clear the Mission-in-Progress (MIP) bit.
SERIAL INTERFACE
The DS1615 provides two different serial communications options; asynchronous and synchronous. Both
communications options will transmit the data LSb first, MSb last.
The mode of communication is selected via the COMSEL pin. When this pin is pulled high, the DS1615
operates in synchronous mode. In this mode, communication with the DS1615 is facilitated by the
SCLK, I/O, and
RST
pins. When COMSEL is pulled low or floated, asynchronous communications is
selected and communication with the device occurs over the TX and RX pins. The operation of each
mode is discussed in further detail below.
Asynchronous Communication
In asynchronous mode, the DS1615 operates as a slave peripheral device which is read and written over a
half duplex asynchronous data interface at the fixed rate of 9,600 bits per second. Data is received and
transmitted in 8-bit bytes using a standard asynchronous serial communications format as shown in
Figure 3. This format is easily generated by the UART in most systems. The DS1615 data format
implements 10 bit words including one start bit, eight data bits, and one stop bit. Data is received by the
DS1615 on the RX pin and transmitted by the TX pin.
COMMUNICATION WORD FORMAT
Figure 3
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1615S | Temperature Recorder |
| DS1615X | Temperature Recorder |
| DS1616 | Temperature and Three Input MUX’ed 8-bit Data Recorder |
| DS1616S | Temperature and Three Input MUX’ed 8-bit Data Recorder |
| DS1620R | Self?Heating Temperature Sensor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1615K | 功能描述:KIT EVAL TEMPERATURE RECORDER RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 過時/停產(chǎn)零件編號 系列:- 標準包裝:1 系列:- 傳感器類型:CMOS 成像，彩色（RGB） 傳感范圍:WVGA 接口:I²C 靈敏度:60 fps 電源電壓:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相關(guān)產(chǎn)品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP |
| DS1615S | 功能描述:板上安裝溫度傳感器 RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| DS1615S/T&R | 制造商:Maxim Integrated Products 功能描述:IC RECORDER TEMP 5V 16-SOIC |
| DS1615S/T&R | 功能描述:IC RECORDER TEMP 5V 16-SOIC RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 實時時鐘 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標準包裝:1 系列:- 類型:時鐘/日歷 特點:警報器，閏年，SRAM 存儲容量:- 時間格式:HH:MM:SS（12/24 小時） 數(shù)據(jù)格式:YY-MM-DD-dd 接口:SPI 電源電壓:2 V ~ 5.5 V 電壓 - 電源，電池:- 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN EP 包裝:管件 |
| DS1615X | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Temperature Recorder |
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