參數(shù)資料
型號(hào)： DS1923
英文描述： Hygrochron Temperature/Humidity Logger iButton with 8kB Data Log Memory
文件頁(yè)數(shù)： 21/52頁(yè)
文件大?。?/td> 495K
代理商： DS1923
DS1923: Hygrochron Temperature/Humidity Logger iButton with 8kB Data Log Memory
GENERAL STATUS
The information in the general status register tells the host computer whether a mission-related command was
executed successfully. Individual status bits indicate whether the DS1923 is performing a mission, waiting for a
temperature alarm to trigger the logging of data or whether the data from the latest mission has been cleared.
General Status Register Bitmap
21 of 52
ADDR
0215h
b7
1
b6
1
b5
0
b4
b3
b2
0
b1
MIP
b0
0
WFTA
MEMCLR
There is only read access to this register. Bits 0, 2, 5, 6, and 7 have no function.
Register Details
Bit Description
Bit(s)
Definition
MIP: Mission In Progress
b1
If this bit reads 1 the device has been set up for a mission and this
mission is still in progress. The MIP bit returns from logic 1 to logic 0
when a mission is ended. See function commands Start Mission and
Stop Mission.
If this bit reads 1, the Mission Time Stamp, Mission Sample Counter, as
well as all the alarm flags of the Alarm Status Register have been
cleared in preparation of a new mission. Executing the Clear Memory
command clears these memory sections. The MEMCLR bit returns to 0
as soon as a new mission is started by using the Start Mission
command. The memory has to be cleared in order for a mission to start.
If this bit reads 1, the Mission Start upon Temperature Alarm was
selected and the Start Mission command was successfully executed, but
the device has not yet experienced the temperature alarm. This bit is
cleared after a temperature alarm event, but is not affected by the Clear
Memory command. Once set, WFTA remains set if a mission is stopped
before a temperature alarm occurs. To clear WFTA manually before
starting a new mission, set the high temperature alarm (address 0209h)
to -40°C and perform a forced conversion.
MEMCLR: Memory
Cleared
b3
WFTA: Waiting for
Temperature Alarm
b4
MISSION START DELAY
The content of the Mission Start Delay Counter tells how many minutes have to expire from the time a mission was
started until the first measurement of the mission will take place (SUTA = 0) or until the device will start testing the
temperature for a temperature alarm (SUTA = 1). The Mission Start Delay is stored as an unsigned 24-bit integer
number. The maximum delay is 16777215 minutes, equivalent to 11650 days or roughly 31 years. If the start delay
is non-zero and the SUTA bit is set to 1, first the delay has to expire before the device starts testing for temperature
alarms to begin logging data.
Mission Start Delay Counter
ADDR
0216h
0217h
0218h
b7
b6
b5
b4
b3
b2
b1
b0
Delay Low Byte
Delay Center Byte
Delay High Byte
During a mission, there is only read access to these registers.
For a typical mission, the Mission Start Delay is 0. If a mission is too long for a single DS1923 to store all readings
at the selected sample rate, one can use several devices and set the Mission Start Delay for the second device to
start recording as soon as the memory of the first device is full, and so on. The RO bit in the Mission Control
Register (address 0213h) must be set to 0 to prevent overwriting of collected data once the data log memory is full.
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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(chēng):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(chēng):Maxim Integrated Products 功能描述:Hygrochron Temperature/Humidity Logger
DS1923-F5 功能描述:iButton RoHS:否 存儲(chǔ)類(lèi)型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類(lèi)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(chǔ)類(lèi)型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類(lèi)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(chǔ)類(lèi)型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類(lèi)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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