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參數(shù)資料
| 型號： | DS1923 |
| 英文描述： | Hygrochron Temperature/Humidity Logger iButton with 8kB Data Log Memory |
| 文件頁數(shù)： | 22/52頁 |
| 文件大?。?/td> | 495K |
| 代理商： | DS1923 |
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DS1923: Hygrochron Temperature/Humidity Logger iButton with 8kB Data Log Memory
MISSION TIME STAMP
The Mission Time Stamp indicates the date and time of the first temperature and/or humidity sample of the
mission. There is only read access to the Mission Time Stamp Register.
Mission Time Stamp Registers Bitmap
22 of 52
ADDR
0219h
021Ah
021Bh
b7
0
0
0
b6
b5
b4
b3
b2
b1
b0
10 Seconds
10 Minutes
20h.
AM/PM
Single Seconds
Single Minutes
Single Hours
12/24
10h.
021Ch
021Dh
021Eh
0
0
0
10 Years
10 Date
0
Single Date
Single Months
Single Years
CENT
10m.
MISSION PROGRESS INDICATOR
Depending on settings in the Mission Control Register (address 0213h) the DS1923 logs temperature and/or
humidity in 8-bit or 16-bit format. The description of the ETL and EHL bit explains where the device stores data in
its data log memory. The Mission Sample Counter together with the starting address and the logging format (8 or
16 bits) provides the information to identify valid blocks of data that have been gathered during the current (MIP =
1) or latest mission (MIP = 0). See section Data log Memory Usage for an illustration. Note that when SUTA = 1,
the Mission Sample Counter does not increment when the first sample is logged.
Mission Sample Counter Register Map
ADDR
0220h
0221h
0222h
b7
b6
b5
b4
Low Byte
Center Byte
High Byte
b3
b2
b1
b0
There is only read access to this register. Note that when both the internal temperature and humidity logging are
enabled, the two log readings are counted as one event in the
Mission Sample Counter
and
Device Sample
Counter
.
The number read from the Mission Sample Counter indicates how often the DS1923 woke up during a mission to
measure temperature and/or humidity. The number format is 24-bit unsigned integer. The Mission Sample Counter
is reset through the Clear Memory command.
OTHER INDICATORS
The Device Sample Counter is similar to the Mission Sample Counter. During a mission this counter increments
whenever the DS1923 wakes up to measure and log data and when the device is testing for a temperature alarm in
SUTA mode. Between missions the counter increments whenever the Forced Conversion command is executed.
This way the Device Sample Counter functions like a gas gauge for the battery that powers the iButton.
Device Sample Counter Register Map
ADDR
0223h
0224h
0225h
b7
b6
b5
b4
Low Byte
Center Byte
High Byte
b3
b2
b1
b0
There is only read access to this register.
The Device Sample Counter is reset to zero when the iButton is assembled. The counter increments a couple of
times during final test. The number format is 24-bit unsigned integer. The maximum number that can be
represented in this format is 16777215.
The Device Configuration Byte is used to allow the master to distinguish between the DS2422 chip, and the
DS1923, DS1922L, and DS1922T iButtons. The table below shows the codes assigned to the various devices.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS1923-F5 | Hygrochron Temperature/Humidity Logger iButton with 8kB Data Log Memory |
| DS1990 | Serial Number iButton |
| DS1990A | Serial Number iButton |
| DS1990A-F5 | Serial Number iButton |
| DS1994L-F5 | 4kb Plus Time Memory iButton |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1923_1 | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Hygrochron Temperature/Humidity Logger iButton with 8kB Data Log Memory |
| DS1923_11 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Hygrochron Temperature/Humidity Logger |
| DS1923-F5 | 功能描述:iButton RoHS:否 存儲類型:SRAM 存儲容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1923-F5# | 功能描述:iButton Hygrochron Temp/Hum Logger w/8KB DataLog RoHS:否 存儲類型:SRAM 存儲容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1923-F5#W | 功能描述:iButton Hygrochron Temp/Hum Logger w/8KB DataLog RoHS:否 存儲類型:SRAM 存儲容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
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