參數(shù)資料
型號(hào)： LM85
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 模擬信號(hào)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(yè)數(shù)： 21/26頁(yè)
文件大?。?/td> 261K
代理商： LM85
Functional Description
(Continued)
TABLE 9. PWM Duty vs Register Setting
Current Duty
0%
0.3922%
.
.
.
25.098%
.
.
.
50.196%
.
.
.
100%
Value (Decimal)
0
1
.
.
.
64
.
.
.
128
.
.
.
255
Value (Hex)
00h
01h
.
.
.
40h
.
.
.
80h
.
.
.
FFh
4.18 Registers 67-69h: Temperature Limit
Register
Address
67h
68h
69h
Read/
Write
R/W
R/W
R/W
Register
Name
Zone1 Fan Temp Limit
Zone2 Fan Temp Limit
Zone3 Fan Temp Limit
Bit 7
(MSB)
7
7
7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(LSB)
0
0
0
Default
Value
5Ah
5Ah
5Ah
Lock
6
6
6
5
5
5
4
4
4
3
3
3
2
2
2
1
1
1
U
U
U
These are the temperature limits for the individual zones. When the current temperature equals this limit, the fan will be turned
on if it is not already. When the temperature exceeds this limit, the fan speed will be increased according to the algorithm set forth
in the Auto Fan Range, PWM Frequency register description. Default = 90C = 5Ah
This register becomes Read Only when the Ready/Lock/Start/Override register Lock bit is set.Any further attempts to write to this
register shall have no effect. After power up the default value is used whenever the Ready/Lock/Start/Override register Start bit
is cleared even though modifications to this register are possible.
TABLE 10. Temperature Limit vs Register Setting
Temperature
127C
.
.
.
50C
.
.
.
0C
.
.
.
50C
.
.
.
127C
Reading (Decimal)
127
.
.
.
50
.
.
.
0
.
.
.
50
.
.
.
127
Reading (Hex)
81h
.
.
.
CEh
.
.
.
00h
.
.
.
32h
.
.
.
7Fh
L
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21
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