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參數(shù)資料
| 型號： | DS1922L-F5 |
| 英文描述： | Temperature Logger iButton With 8kB Datalog Memory |
| 中文描述： | 溫度記錄儀iButton的記憶與8kB的數(shù)據(jù)記錄 |
| 文件頁數(shù)： | 19/48頁 |
| 文件大?。?/td> | 428K |
| 代理商： | DS1922L-F5 |
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DS1922L/DS1922T
19 of 48
Register Details
BIT DESCRIPTION
BIT(S)
DEFINITION
ETL: Enable Temperature
Logging
b0
To set up the device for a temperature-logging mission, this bit must be
set to logic 1. The recorded temperature values will start at address
1000h.
This bit specifies the format used to store temperature readings in the
datalog memory. If this bit is 0, the data will be stored in 8-bit format. If
this bit is 1, the 16-bit format will be used (higher resolution). With 16-bit
format, the most-significant byte is stored at the lower address.
This bit controls whether, during a mission, the datalog memory is
overwritten with new data or whether data logging is stopped once the
datalog memory is full. Setting this bit to 1 enables the rollover and data
logging continues at the beginning, overwriting previously collected data.
If this bit is 0, the logging and conversions will stop once the datalog
memory is full. However, the RTC will continue to run and the MIP bit
will remain set until the Stop Mission command is performed.
This bit specifies whether a mission begins immediately (includes
delayed start) or if a temperature alarm will be required to start the
mission. If this bit is 1, the device will perform an 8-bit temperature
conversion at the selected sample rate and begin with data logging only
if an alarming temperature (high alarm or low alarm) was found. The first
logged temperature will be one sample period
after
the alarm occurred.
TLFS: Temperature
Logging Format Selection
b2
RO: Rollover Control
b4
SUTA: Start Mission upon
Temperature Alarm
b5
ALARM STATUS
The fastest way to determine whether a programmed temperature threshold was exceeded during a mission is
through reading the Alarm Status Register. In a networked environment that contains multiple DS1922L/T iButtons
the devices that encountered an alarm can quickly be identified by means of the Conditional Search command (see
ROM Function Commands
). The temperature alarm will only occur if enabled (
see Temperature Sensor Alarm
).
The BOR alarm is always enabled.
Alarm Status Register Bitmap
ADDR
0214h
b7
BOR
b6
1
b5
1
b4
1
b3
0
b2
0
b1
THF
b0
TLF
There is only read access to this register. Bits 4 to 6 have no function. They always read 1. Bits 2 and 3 have no
function with the DS1922L and DS1922T. They always read 0. The alarm status bits are cleared simultaneously
when the Clear Memory function is invoked. See
Memory and Control Functions
for details.
Register Details
BIT DESCRIPTION
BIT(S)
DEFINITION
TLF: Temperature Low
Alarm Flag
b0
If this bit reads 1, there was at least one temperature conversion during
a mission revealing a temperature equal to or lower than the value in the
Temperature Low Alarm Register. A forced conversion can affect the
TLF bit. This bit can also be set with the initial alarm in the SUTA = 1
mode.
If this bit reads 1, there was at least one temperature conversion during
a mission revealing a temperature equal to or higher than the value in
the Temperature High Alarm Register. A forced conversion can affect
the THF bit. This bit can also be set with the initial alarm in the SUTA =
1 mode.
If this bit reads 1, the device has performed a power-on-reset. This
indicates that the device has experienced a shock big enough to
interrupt the internal battery power supply. The device may still appear
functional, but it has lost its factory calibration. Any data found in the
datalog memory should be disregarded.
THF: Temperature High
Alarm Flag
b1
BOR: Battery On Reset
Alarm
b7
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS1922L-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 |
| DS1922L-F5#A20 | 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 |
| DS1922L-F5#A22 | 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 |
| DS1922L-F5#W | 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 |
| DS1922L-F5/A1E | 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 |
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