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)： 17/48頁
文件大?。?/td> 428K
代理商： DS1922L-F5
DS1922L/DS1922T
17 of 48
Latest Temperature Conversion Result Register Bitmap
ADDR
020Ch
020Dh
b7
T2
T10
b6
T1
T9
b5
T0
T8
b4
0
T7
b3
0
T6
b2
0
T5
b1
0
T4
b0
0
T3
TRL
TRH
With TRH and TRL representing the decimal equivalent of a temperature reading the temperature value is
calculated as
(°C) = TRH/2 - 41 + TRL/512
(°C) = TRH/2 - 41
(16 bit mode, TLFS = 1, see address 0213h)
(8 bit mode, TLFS = 0, see address 0213h)
This equation is valid for converting temperature readings stored in the datalog memory as well as for data read
from the Latest Temperature Conversion Result Register. The "-41" applies to the DS1922L. For the DS1922T use
"-1" instead of "-41".
To specify the temperature alarm thresholds, the equation above needs to be resolved to
TALM = 2 * (°C) + 82
The "+82" applies to the DS1922L. For the DS1922T use "+2" instead of "+82".
Since the temperature alarm threshold is only one byte, the resolution or temperature increment is limited to 0.5°C.
The TALM value needs to be converted into hexadecimal format before it can be written to one of the temperature
alarm threshold registers (
Low Alarm address 0208h; High Alarm address 0209h
). Independent of the
conversion mode (8 or 16 bit) only the most significant byte of a temperature conversion is used to determine
whether an alarm will be generated.
Temperature Conversion Examples
Mode
8-bit
8-bit
16-bit
16-bit
TRH
decimal
hex
54h
17h
54h
17h
TRL
decimal
hex
(°C)
DS1922L
(°C)
DS1922T
41.0
10.5
41.000
10.6875
84
23
84
23
—
—
00h
60h
—
—
0
96
1.0
-29.5
1.000
-29.3125
Temperature Alarm Threshold Examples
(°C)
TALM (DS1922L)
hex
decimal
85h
3Eh
(°C)
TALM (DS1922T)
hex
decimal
85h
3Eh
25.5
-10.0
133
62
65.5
30.0
133
62
TEMPERATURE SENSOR ALARM
The DS1922L/T has two Temperature Alarm Threshold Registers (address 0208h, 0209h) to store values, which
determine whether a critical temperature has been reached. A temperature alarm is generated if the device
measures an alarming temperature AND the alarm signaling is enabled. The bits ETLA and ETHA that enable the
temperature alarm are located in the Temperature Sensor Control Register. The temperature alarm flags TLF and
THF are found in the Alarm Status Register at address 0214h.
Temperature Sensor Control Register Bitmap
ADDR
0210h
b7
0
b6
0
b5
0
b4
0
b3
0
b2
0
b1
b0
ETHA
ETLA
During a mission, there is only read access to this register. Bits 2 to 7 have no function. They always read 0 and
cannot be written to 1.
相關PDF資料
PDF描述
DS1992 1kb/4kb Memory iButton
DS1993 1kb/4kb Memory iButton
DS1992L-F5 1kbit/4kbit Memory iButtonTM DS1994 4-kbit Plus Time Memory iButtonTM
DS21349DK T1/J1 Line Interface Unit Design Kit
DS2149DK T1/J1 Line Interface Unit Design Kit
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
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*