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參數(shù)資料
| 型號： | DS1922T |
| 英文描述： | Temperature Logger iButton with 8kB Datalog Memory |
| 文件頁數(shù)： | 20/48頁 |
| 文件大小： | 428K |
| 代理商： | DS1922T |
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DS1922L/DS1922T
20 of 48
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 DS1922L/T 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
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 Samples 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 will return 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 will remain 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 will 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 DS1922L/T 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 datalog
memory is full.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1922T-A1F | 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 |
| DS1922T-A1F+ | 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 |
| DS1922T-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 |
| DS1922T-F5# | 功能描述:iButton Temp Logger Ibutton w/8Kb Datalog Mem 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 |
| DS1922T-F50 | 制造商:Maxim Integrated Products 功能描述:THERMOCHRON,IBTN,F5,HI-TEMP,8K - Rail/Tube |
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