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參數(shù)資料
| 型號： | LM85 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | Hardware Monitor with Integrated Fan Control |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO24 |
| 封裝： | QSOP-24 |
| 文件頁數(shù)： | 15/26頁 |
| 文件大小： | 261K |
| 代理商： | LM85 |
Functional Description
(Continued)
4.11 Registers 44-4Dh: Voltage Limit Registers
Register
Address
44h
45h
46h
47h
48h
49h
4Ah
4Bh
4Ch
4Dh
Read/
Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Register
Name
2.5V Low Limit
2.5V High Limit
V
CCP
Low Limit
V
CCP
High Limit
3.3V Low Limit
3.3V High Limit
5V Low Limit
5V High Limit
12V Low Limit
12V High Limit
Bit 7
(MSB)
7
7
7
7
7
7
7
7
7
7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(LSB)
0
0
0
0
0
0
0
0
0
0
Default
Value
00h
FFh
00h
FFh
00h
FFh
00h
FFh
00h
FFh
6
6
6
6
6
6
6
6
6
6
5
5
5
5
5
5
5
5
5
5
4
4
4
4
4
4
4
4
4
4
3
3
3
3
3
3
3
3
3
3
2
2
2
2
2
2
2
2
2
2
1
1
1
1
1
1
1
1
1
1
If a voltage input either exceeds the value set in the voltage high limit register or falls below the value set in the voltage low limit
register, the corresponding bit will be set automatically by the LM85 in the interrupt status registers (41-42h). Voltages are
presented in the registers at
3
4
full scale for the nominal voltage, meaning that at nominal voltage, each input will be C0h, as
shown in
Table 2
.
Setting the Ready/Lock/Start/Override register Lock bit has no effect on these registers.
TABLE 2. Voltage Limits vs Register Setting
Input
Nominal
Voltage
2.5V
2.25V
3.3V
5.0V
12.0V
Register Setting at
Nominal Voltage
C0h
C0h
C0h
C0h
C0h
Maximum
Voltage
3.32V
3.00V
4.38V
6.64V
16.00V
Register Reading at
Maximum Voltage
FFh
FFh
FFh
FFh
FFh
Minimum
Voltage
0V
0V
3.0V
0V
0V
Register Reading at
Minimum Voltage
00h
00h
AFh
00h
00h
2.5V
V
CCP
3.3V
5V
12V
4.12 Registers 4E-53h: Temperature Limit Registers
Register
Address
4Eh
Read/
Write
R/W
Register
Name
Processor (Zone1)
Low Temp
Processor (Zone1)
High Temp
Processor (Zone2)
Low Temp
Processor (Zone2)
High Temp
Processor (Zone3)
Low Temp
Processor (Zone3)
High Temp
Bit 7
(MSB)
7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(LSB)
0
Default
Value
81h
6
5
4
3
2
1
4Fh
R/W
7
6
5
4
3
2
1
0
7Fh
50h
R/W
7
6
5
4
3
2
1
0
81h
51h
R/W
7
6
5
4
3
2
1
0
7Fh
52h
R/W
7
6
5
4
3
2
1
0
81h
53h
R/W
7
6
5
4
3
2
1
0
7Fh
If an external temperature input or the internal temperature sensor either exceeds the value set in the corresponding high limit
register or falls below the value set in the corresponding low limit register, the corresponding bit will be set automatically by the
LM85 in the Interrupt Status Register 1 (41h). For example, if the temperature read from the Remote1 and Remote1+ inputs
exceeds the Processor (Zone1) High Temp register limit setting, Interrupt Status Register 1 ZN1 bit will be set. The temperature
limits in these registers are represented as 8 bit, 2’s complement, signed numbers in Celsius, as shown below in
Table 3
.
Setting the Ready/Lock/Start/Override register Lock bit has no effect on these registers.
L
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