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參數(shù)資料
| 型號(hào)： | LM85 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 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 |
| 文件頁數(shù)： | 20/26頁 |
| 文件大?。?/td> | 261K |
| 代理商： | LM85 |
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Functional Description
(Continued)
TABLE 7. Spike Smoothing
ZN-X[2:0]
000
001
010
011
100
101
110
111
Spike Smoothed Over
35 seconds
17.6 seconds
11.8 seconds
7.0 seconds
4.4 seconds
3.0 seconds
1.6 seconds
.8 seconds
TABLE 8. PWM Output Below Limit Depending on Value of Off/Min
Off/Min
0
1
PWM Action
At 0% duty below LIMIT
At Min PWM Duty below LIMIT
4.17 Registers 64-66h: Minimum PWM Duty Cycle
Register
Address
64h
65h
66h
Read/
Write
R/W
R/W
R/W
Register
Name
Fan1 PWM Minimum
Fan2 PWM Minimum
Fan3 PWM Minimum
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
80h
80h
80h
Lock
6
6
6
5
5
5
4
4
4
3
3
3
2
2
2
1
1
1
U
U
U
These registers specify the minimum duty cycle that the PWM will output when the measured temperature reaches the
Temperature LIMIT register setting.
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.
20035307
FIGURE 2. What LM85 Auto Fan Control Sees With and Without Spike Smoothing
L
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