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LM85 Datasheet(PDF) 9 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM85
Description  Hardware Monitor with Integrated Fan Control
PDF  26 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM85 Datasheet(HTML) 9 Page - National Semiconductor (TI)

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Functional Description (Continued)
Register
Address
Read/
Write
Register
Name
Bit 7
(MSB)
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
(LSB)
Default
Value
Lock?
49h
R/W
3.3V High Limit
7
6
5
4
3
2
1
0
FFh
4Ah
R/W
5V Low Limit
7
6
5
4
3
2
1
0
00h
4Bh
R/W
5V High Limit
7
6
5
4
3
2
1
0
FFh
4Ch
R/W
12V Low Limit
7
6
5
4
3
2
1
0
00h
4Dh
R/W
12V High Limit
7
6
5
4
3
2
1
0
FFh
4Eh
R/W
Processor (Zone1) Low
Temp
7
6
5
4
3
2
1
0
81h
4Fh
R/W
Processor (Zone1) High
Temp
7
6
5
4
3
2
1
0
7Fh
50h
R/W
Internal (Zone2) Low
Temp
7
6
5
4
3
2
1
0
81h
51h
R/W
Internal (Zone2) High
Temp
7
6
5
4
3
2
1
0
7Fh
52h
R/W
Remote (Zone3) Low
Temp
7
6
5
4
3
2
1
0
81h
53h
R/W
Remote (Zone3) High
Temp
7
6
5
4
3
2
1
0
7Fh
54h
R/W
Tach1 Minimum LSB
7
6
5
4
3
2
1
0
FFh
55h
R/W
Tach1 Minimum MSB
15
14
13
12
11
10
9
8
FFh
56h
R/W
Tach2 Minimum LSB
7
6
5
4
3
2
1
0
FFh
57h
R/W
Tach2 Minimum MSB
15
14
13
12
11
10
9
8
FFh
58h
R/W
Tach3 Minimum LSB
7
6
5
4
3
2
1
0
FFh
59h
R/W
Tach3 Minimum MSB
15
14
13
12
11
10
9
8
FFh
5Ah
R/W
Tach4 Minimum LSB
7
6
5
4
3
2
1
0
FFh
5Bh
R/W
Tach4 Minimum MSB
15
14
13
12
11
10
9
8
FFh
5Ch
R/W
Fan1 Configuration
ZON2 ZON1 ZON0
INV
RES
SPIN2
SPIN1
SPIN0
62h
U
5Dh
R/W
Fan2 Configuration
ZON2 ZON1 ZON0
INV
RES
SPIN2
SPIN1
SPIN0
62h
U
5Eh
R/W
Fan3 Configuration
ZON2 ZON1 ZON0
INV
RES
SPIN2
SPIN1
SPIN0
62h
U
5Fh
R/W
Fan1 Range/Frequency
RAN3 RAN2 RAN1 RAN0
RES
FRQ2
FRQ1
FRQ0
C4h
U
60h
R/W
Fan2 Range/Frequency
RAN3 RAN2 RAN1 RAN0
RES
FRQ2
FRQ1
FRQ0
C4h
U
61h
R/W
Fan3 Range/Frequency
RAN3 RAN2 RAN1 RAN0
RES
FRQ2
FRQ1
FRQ0
C4h
U
62h
R/W
Min/Off, Zone1 Spike
Smoothing
OFF3
OFF2 OFF1
RES
ZN1E
ZN1-2
ZN1-1
ZN1-0
00H
U
63h
R/W
Zone2, Zone3 Spike
Smoothing
ZN2E ZN2-2 ZN2-1 ZN2-0
ZN3E
ZN3-2
ZN3-1
ZN3-0
00h
U
64h
R/W
Fan1 PWM Minimum
7
6
5
4
3
2
1
0
80h
U
65h
R/W
Fan2 PWM Minimum
7
6
5
4
3
2
1
0
80h
U
66h
R/W
Fan3 PWM Minimum
7
6
5
4
3
2
1
0
80h
U
67h
R/W
Zone1 Fan Temp Limit
7
6
5
4
3
2
1
0
5Ah
U
68h
R/W
Zone2 Fan Temp Limit
7
6
5
4
3
2
1
0
5Ah
U
69h
R/W
Zone3 Fan Temp Limit
7
6
5
4
3
2
1
0
5Ah
U
6Ah
R/W
Zone1 Temp Absolute
Limit
7
6
5
4
3
2
1
0
64h
U
6Bh
R/W
Zone2 Temp Absolute
Limit
7
6
5
4
3
2
1
0
64h
U
6Ch
R/W
Zone3 Temp Absolute
Limit
7
6
5
4
3
2
1
0
64h
U
6Dh
R/W
Zone1, Zone2 Hysteresis
H1-3
H1-2
H1-1
H1-0
H2-3
H2-2
H2-1
H2-0
44h
U
6Eh
R/W
Zone3 Hysteresis
H3-3
H3-2
H3-1
H3-0
RES
RES
RES
RES
40h
U
www.national.com
9



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