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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)： | 18/48頁 |
| 文件大?。?/td> | 428K |
| 代理商： | DS1922L-F5 |
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DS1922L/DS1922T
18 of 48
Register Details
BIT DESCRIPTION
BIT(S)
DEFINITION
ETLA: Enable Tempera-
ture Low Alarm
b0
This bit controls whether, during a mission, the temperature low alarm
flag (TLF) may be set, if a temperature conversion results in a value
equal to or lower than the value in the Temperature Low Alarm
Threshold Register. If ETLA is 1, temperature low alarms are enabled. If
ETLA is 0, temperature low alarms will not be generated.
This bit controls whether, during a mission, the temperature high alarm
flag (THF) may be set, if a temperature conversion results in a value
equal to or higher than the value in the Temperature High Alarm
Threshold Register. If ETHA is 1, temperature high alarms are enabled.
If ETHA is 0, temperature high alarms will not be generated.
ETHA: Enable
Temperature High Alarm
b1
RTC CONTROL
To minimize the power consumption of a DS1922L/T, the RTC oscillator should be turned off when device is not in
use. The oscillator on/off bit is located in the RTC control register. This register also includes the EHSS bit, which
determines whether the sample rate is specified in seconds or minutes.
RTC Control Register Bitmap
ADDR
0212h
b7
0
b6
0
b5
0
b4
0
b3
0
b2
0
b1
b0
EHSS
EOSC
During a mission, there is only read access to this register. Bits 2-7 have no function. They always read 0 and
cannot be written to 1.
Register Details
BIT DESCRIPTION
BIT(S)
DEFINITION
EOSC: Enable Oscillator
b0
This bit controls the crystal oscillator of the real-time clock. When set to
logic 1, the oscillator will start operation. When written to logic 0, the
oscillator will stop and the device is in a low-power data retention mode.
This bit must be 1 for normal operation.
A temperature conversion
must not be attempted while the RTC oscillator is stopped. This
will cause the device to enter into an unrecoverable state.
This bit controls the speed of the sample rate counter. When set to logic
0, the sample rate is specified in minutes. When set to logic 1, the
sample rate is specified in seconds.
EHSS: Enable High
Speed Sample
b1
MISSION CONTROL
The DS1922L/T is set up for its operation by writing appropriate data to its special function registers, which are
located in the two register pages. The settings in the Mission Control Register determine which format (8 or 16 bits)
is to be used and whether old data may be overwritten by new data, once the datalog memory is full. An additional
control bit can be set to tell the DS1922L/T to wait with logging data until a temperature alarm is encountered.
Mission Control Register Bitmap
ADDR
0213h
b7
1
b6
1
b5
b4
RO
b3
(X)
b2
b1
0
b0
ETL
SUTA
TLFS
During a mission, there is only read access to this register. Bits 6 and 7 have no function. They always read 1 and
cannot be written to 0. Bits 1 and 3 control functions that are not available with the DS1922L and DS1922T. Bit 1
must be set to 0. Under this condition the setting of bit 3 becomes a “don’t care”.
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相關代理商/技術參數(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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