參數(shù)資料
型號(hào)： DS2422S
英文描述： 1-Wire Temperature/Datalogger with 8kB Datalog Memory
中文描述： 1 - Wire溫度/數(shù)據(jù)記錄器與8kB的數(shù)據(jù)記錄存儲(chǔ)器
文件頁(yè)數(shù)： 13/48頁(yè)
文件大小： 444K
代理商： DS2422S
DS2422
13 of 48
SAMPLE RATE
The content of the Sample Rate Register (addresses 0206h, 0207h) specifies the time elapse (in seconds if EHSS
= 1, or minutes if EHSS = 0) between two temperature/data logging events. The sample rate may be any value
from 1 to 16383, coded as an unsigned 14-bit binary number. If EHSS = 1, the shortest time between logging
events is 1 second and the longest (sample rate = 3FFFh) is 4.55 hours. If EHSS = 0, the shortest is 1 minute and
the longest time is 273.05 hours (sample rate = 3FFFh). The EHSS bit is located in the RTC Control Register at
address 0212h. It is important that the user sets the EHSS bit accordingly while setting the Sample Rate register. A
sample rate of 0000h is not valid and must be avoided under all circumstances. This causes the device to enter
into an undefined state, requiring a power-on reset and restore of the trim settings to recover.
Sample Rate Register Bitmap
ADDR
0206h
0207h
b7
b6
b5
b4
b3
b2
b1
b0
Sample Rate Low
0
0
Sample Rate High
During a mission, there is only read access to these registers. Bits cells marked "0" always read 0 and cannot be
written to 1.
TEMPERATURE CONVERSION
The DS2422 can measure temperatures from -40°C to +85°C. Temperature values are represented as an 8- or 16-
bit unsigned binary number with a resolution of 0.5°C in the 8-bit mode and 0.0625°C in the 16-bit mode.
The higher temperature byte TRH is always valid. In the 16-bit mode only the three highest bits of the lower byte
TRL are valid. The five lower bits all read zero. TRL is undefined if the device is in 8-bit temperature mode. An out-
of-range temperature reading is indicated as 00h or 0000h when too cold and FFh or FFE0h when too hot.
Latest Temperature Conversion Result Register Bitmap
ADDR
020Ch
020Dh
b7
T2
T10
b6
T1
T9
b5
T0
T8
b4
0
T7
b3
0
T6
b2
0
T5
b1
0
T4
b0
0
T3
TRL
TRH
With TRH and TRL representing the decimal equivalent of a temperature reading the temperature value is
calculated as
(°C) = TRH/2 - 41 + TRL/512
(°C) = TRH/2 - 41
(16 bit mode, TLFS = 1, see address 0213h)
(8 bit mode, TLFS = 0, see address 0213h)
This equation is valid for converting temperature readings stored in the datalog memory as well as for data read
from the Latest Temperature Conversion Result Register.
To specify the temperature alarm thresholds, the equation above needs to be resolved to
TALM = 2 * (°C) + 82
Since the temperature alarm threshold is only one byte, the resolution or temperature increment is limited to 0.5°C.
The TALM value needs to be converted into hexadecimal format before it can be written to one of the temperature
alarm threshold registers (
Low Alarm address 0208h; High Alarm address 0209h
). Independent of the
conversion mode (8 or 16 bit) only the most significant byte of a temperature conversion is used to determine
whether an alarm will be generated.
Temperature Conversion Examples
Mode
TRH
decimal
hex
54h
17h
54h
17h
TRL
decimal
hex
(°C)
8-bit
8-bit
16-bit
16-bit
84
23
84
23
—
—
00h
60h
—
—
0
96
1.0
-29.5
1.000
-29.3125
相關(guān)PDF資料
PDF描述
DS2482-800 Eight-Channel 1-Wire Master
DS2482-100 Single-Channel 1-Wire Master
DS2482S-100 Single-Channel 1-Wire Master
DS2482S-800 Eight-Channel 1-Wire Master
DS2502-E48 48-Bit Node Address Chip
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS2422S+ 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(zhǔn)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
DS2422X 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(zhǔn)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
DS2423 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:4kbit 1-Wire RAM with Counter
DS2423D/T&R 制造商:Maxim Integrated Products 功能描述:IC SRAM 4KBIT 6FLIPCHIP
DS2423D/T&R 功能描述:IC SRAM 4KBIT 6FCHIP RoHS:否 類別:集成電路 (IC) >> 存儲(chǔ)器 系列:- 標(biāo)準(zhǔn)包裝:150 系列:- 格式 - 存儲(chǔ)器:EEPROMs - 串行 存儲(chǔ)器類型:EEPROM 存儲(chǔ)容量:4K (2 x 256 x 8) 速度:400kHz 接口:I²C，2 線串口 電源電壓:2.5 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 封裝/外殼:8-VFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-DFN（2x3） 包裝:管件 產(chǎn)品目錄頁(yè)面:1445 (CN2011-ZH PDF)
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