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參數(shù)資料
| 型號： | LM32 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 溫度/濕度傳感器 |
| 英文描述： | Dual Thermal Diode Temperature Sensor with SensorPath Bus |
| 中文描述： | 雙熱二極管溫度傳感器SensorPath總線 |
| 文件頁數(shù)： | 19/24頁 |
| 文件大?。?/td> | 340K |
| 代理商： | LM32 |
2.0 Register Set
(Continued)
2.9.3 Temperature Data Readout (Addr: 001 001; 09h)
Reg
Add
Register
Name
R/
W
P
O
R
Val
Bit
15
MSb
Bit
14
Bit
13
Bit
12
Bit
11
Bit
10
Bit
9
Bit
8
Bit
7
Bit
6
Bit
5
Bit
4
Bit
3
Bit
2
Bit
1
Bit
0
LSb
001 001
Local
Temperature
Data
Readout
Processor/
Remote
Temperature
Data
Readout
R
MSb
Sign
128
C
64C 32C 16C 8C
4C
2C
1C
0.5
C
Reserved
SNUM
Reserved
0
0
0
0
Reserved
EF
Res
0
0
0
Bit
0
1
Type
RO
RO
Description
Reserved.
Will always read "0".
Reserved for Local Temperature Data Readout.
Will always read "0".
EF (Error Flag) for Remote Temperature Data Readout.
This bit indicates that an error was detected
during the measurement of the current remote Temperature sensor such as a diode fault condition. When a
diode fault occurs the value of the temperature reading will be 200h or -256C.
0: No error detected.
1: Error detected.
SNUM (Sensor Number).
This field indicates the number of the current Temperature Sensor, to which the
data in the Temperature Readout field belongs. Temperature Sensor 0 is always assigned to the local
sensor of the LM32.
0: Local temperature sensor (see
Table Thermal Diode Input Mapping
)
1-2: Remote sensor 1 and 2 (see
Table Thermal Diode Input Mapping
)
Reserved.
Will always read "0".
Temperature Readout.
This field holds the result of the temperature measurement. The active size of this
field for the LM32 is 10-bits, left justified. See
Table Temperature Data Format
for examples.
3-2
RO
5-4
15-6
RO
RO
Thermal Diode Input Mapping
Sensor Number
(SNUM)
0
1
2
Sensor Input
Local
Processor, D1+/D1-
Remote, D2+/D2-
Board Connection
none
CPU Thermal Diode
MMBT3904 Thermal Diode or GPU
Thermal Diode
All LM32 temperature data has a common format. The LM32’s temperature data format is two’s complement and has 10-bits of
resolution with the LSb having a weight of 0.5 C. The LM32 can resolve temperature between +255.5 C and -256 C, inclusive.
It can measure local temperatures between +85 C and 0 C and remote temperatures between +125 C and 0 C with an
accuracy of
±
3.0 C.
Temperature Data Format
Temperature
+140 C
+100 C
+1 C
0 C
- 0.5 C
-1 C
Binary
01 0001 1000
00 1100 1000
00 0000 0010
00 0000 0000
11 1111 1111
11 1111 1110
Hex
118h
0C8h
002h
000h
3FFh
3FEh
L
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