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參數(shù)資料
| 型號： | DS18S20Z |
| 元件分類： | 溫度傳感器 |
| 英文描述： | High Precision 1-Wire Digital Thermometer |
| 中文描述： | 高精度1 - Wire數(shù)字溫度計 |
| 文件頁數(shù)： | 8/27頁 |
| 文件大?。?/td> | 136K |
| 代理商： | DS18S20Z |
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DS18S20
8 of 27
1-WIRE CRC CODE
Figure 6
MEMORY
The DS18S20’s memory is organized as shown in Figure 7. The memory consists of a scratchpad RAM
and a nonvolatile, electrically erasable (E
2
) RAM, which stores the high and low temperature triggers, TH
and TL. The scratchpad helps insure data integrity when communicating over the 1–Wire bus. Data is
first written to the scratchpad where it can be read back. After the data has been verified, a copy
scratchpad command will transfer the data to the nonvolatile (E
2
) RAM. This process insures data
integrity when modifying the memory. The DS18S20 EEPROM is rated for a minimum of 50,000 writes
and 10 years data retention at T = +55°C.
The scratchpad is organized as 8 bytes of memory. The first 2-bytes contain the measured temperature
information. The third and fourth bytes are volatile copies of TH and TL and are refreshed with every
power–on reset. The next 2 bytes are not used; upon reading back, however, they will appear as all logic
“1s”. The seventh and eighth bytes are count registers, which may be used in obtaining higher
temperature resolution (see “Operation–measuring Temperature” section). There is a ninth byte which
may be read with a Read Scratchpad command. This byte contains a cyclic redundancy check (CRC)
byte which is the CRC over all of the 8 previous bytes. This CRC is implemented in the fashion
described in the section titled “CRC Generation."
DS18S20 MEMORY MAP
Figure 7
TEMPERATURE LSB
TEMPERATURE MSB
TH/USER BYTE 1
TL/USER BYTE 2
RESERVED
COUNT REMAIN
COUNT PER °C
CRC
TH/USER BYTE 1
TL/USER BYTE 2
RESERVED
SCRATCHPAD
BYTE
0
1
2
3
4
5
6
7
8
E
2
RAM
(MSB)
(LSB)
XOR
XOR
XOR
INPUT
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS18S20Z/T&R | 制造商:Maxim Integrated Products 功能描述:HI PREC MICROLAN DIG THERM 8-SO T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERM MICROLAN HI-PREC 8-SOIC |
| DS18S20Z/T&R | 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 |
| DS18S20Z+ | 功能描述:板上安裝溫度傳感器 Prgmble Resolution 1-Wire Parasite Pwr 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 |
| DS18S20Z+T&R | 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL 1-WIRE 8SOIC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:HI PREC MICROLAN DIG THERM 8-SO T&R 制造商:Maxim Integrated Products 功能描述:IC THERM MICROLAN HI-PREC 8SOIC 制造商:Maxim Integrated Products 功能描述:IC THERM MICROLAN HI-PREC 8-SOIC 制造商:Maxim Integrated Products 功能描述:Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr |
| DS18S20Z+T&R | 功能描述:板上安裝溫度傳感器 Prgmble Resolution 1-Wire Parasite Pwr 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 |
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