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參數(shù)資料
| 型號： | DS1615X |
| 英文描述： | Temperature Recorder |
| 中文描述： | 溫度記錄儀 |
| 文件頁數(shù)： | 17/24頁 |
| 文件大?。?/td> | 199K |
| 代理商： | DS1615X |
DS1615
17 of 24
Synchronous Communication
Synchronous communication is accomplished over the 3-wire bus which is composed of three signals.
These are the
RST
(reset), the SCLK (serial clock), and I/O (data I/O) pins. The 3-wire bus operates at a
maximum data rate of 2 Mbps. All data transfers are initiated by driving the
RST
input high and are
terminated by driving
RST
low. (See Figures 6 and 7.) A clock cycle is a sequence of a falling edge
followed by a rising edge. For data inputs, the data must be valid during the rising edge. Data bits are
output on the falling edge of the clock and remain valid through the rising edge.
When reading data from the DS1615, the I/O pin goes to a high impedance state when the clock is high.
Taking
RST
low will terminate any communication and cause the I/O pin to go to a high impedance state.
General Communications Format
Communication with the DS1615 in both synchronous and asynchronous modes is accomplished by first
writing a command to the device. The command is then followed by the parameters and/or data required
by the command. The command set for the DS1615 can be seen in Table 3. Reads and writes to the
DS1615 differ in that writes are performed one byte at a time while reads are performed in page long (up
to 32 byte) bursts. Writing one byte at a time simply means that a write command has to be issued before
each byte of data that is written. For example, writing to the user NV RAM requires that the Write User
NV RAM command be writ-ten followed by the address to be written and then the actual data byte.
Writing a second data byte would require the same procedure with a new address specified. Reads,
however, are accomplished in bursts. For example, if an end user wants to read data from a specific page
he would first issue the Read Page command, followed by the address to begin reading. After the
DS1615 receives the command and starting address, it will immediately transmit the data that resides at
the given address location. However, rather than stop with that single byte of data, the DS1615 will
continue transmitting the next byte of data and will continue transmitting data until the page boundary is
reached. A page read can begin at any address, but will always end at the page boundary. Thus, a page
read can range from 1 to 32 bytes. It should be noted that a read can be terminated at any time when
communicating in synchronous mode by pulling
RST
to ground. However, in asynchronous mode, the
DS1615 will not stop transmitting data until the page boundary is reached.
Cyclical Redundancy Check (CRC)
When communicating in the asynchronous mode, a 16-bit CRC is transmitted by the DS1615 following
the transmission of all data. When communicating in synchronous mode, no CRC is transmitted.
The 16-bit CRC (Cyclical Redundancy Check) is used to insure the accuracy of the data that is read from
the DS1615. The CRC is generated according to the standardized CRC16-polynomial function X
16
+ X
15
+
X
2
1. Figure 4 illustrates the function of the generator. The CRC is generated by clearing the CRC
generator and then shifting in data from the register set being read. A sixteen bit CRC is transmitted by
the DS1615 after the last register of any page of memory is read. In other words, a CRC is generated at
the end boundary of every page that is read.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 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 |
| DS1621 | Digital Thermometer and Thermostat |
| DS1624 | Digital Thermometer and Memory |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1616 | 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 |
| DS1616K-000 | 功能描述:KIT EVAL TEMP A/D DATA 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 |
| DS1616S | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Temperature and Three Input MUX’ed 8-bit Data Recorder |
| DS-1616ZJ | 制造商:Hikvision USA 功能描述:Pendant Wall Mount Bracket 3.8In X 7.65In X 12.2In 制造商:HIKVISION 功能描述:PENDANT WALL MOUNT BRACKET 3.8IN X 7.65IN X 12.2IN |
| DS16177D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Bus Transceiver |
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