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NCT7491_16 Datasheet, PDF (38/80 Pages) ON Semiconductor – Remote Thermal Monitor and Fan Controller
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NCT7491
Table 31. REGISTER TABLES
Address R/W
Description
0x00
R/W
PECI0 Address
0x01
R/W
PECI1 Address
0x02
R/W
PECI2 Address
0x03
R/W
PECI3 Address
0x04
R
PECI0_Abs
0x05
R
PECI1_Abs
0x06
R
PECI2_Abs
0x07
R
PECI3_Abs
0x08
R/W
PECI1 Tcontrol
0x09
R/W
PECI2 Tcontrol
0x0A
R/W
PECI3 Tcontrol
0x0B
R
PECI0 Tjmax
0x0C
R
PECI1 Tjmax
0x0D
R
PECI2 Tjmax
0x0E
R
PECI3 Tjmax
0x0F
R/W
PECI Config 4
0x10
R/W
Config. 6
0x11
R/W
0x12
R
0x13
0x14
R/W
0x15
R/W
0x16
R/W
Config. 7
Interrupt Status 6
Config. 8
PWMStep1
PWMStep2
THERM Config1
0x17
R/W
THERM Config2
0x18
R/W
THERM Config3
0x19
R/W
THERM Config4
0x1A
R
PECI1
0x1B
R
PECI2
0x1C
R
PECI3
0x1D
R
Device ID
0x1E
R
Vtt measurement
0x1F
R
Extended resolution 3
0x20
R
2.5 V Measurement
0x21
R
0x22
R
0x23
R
VCCP Measurement
VCC Measurement
5 V Measurement
0x24
R
12 V Measurement
0x25
R
Remote 1 Temperature
0x26
R
Local Temperature
0x27
R
Remote 2 Temperature
0x28
R
TACH 1 Low Byte
0x29
R
TACH 1 High Byte
0x2A
R
TACH 2 Low Byte
0x2B
R
TACH 2 High Byte
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
DM3CPU DM3CPU DM2CPU DM2CPU DM1CPU DM1CPU DM0CPU DM0CPU
VCCP Low
IFT
SMBRT1 SMBRT0
PWM3
Mode
PWM2
Mode
PWM1
Mode
SMBFS3 SMBFS2 SMBFS1 TODIS
FSPDIS
VTT
FSPD THERMHys
OOL10
OOL9
OOL8
OOL7
OOL6
OOL5
OOL4
OOL0
Vcc
2.5V
Vccp
5V
12V
Rem2
Rem1
Local
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
SMBus
THERM
Push Max/Full 3 Max/Full 2 Max/Full 1 TMRP1
THERM
TMRP0
P3TH
P2TH
P1TH
PECSTEP PECSTEP PECSTEP PECSTEP SMBSTEP SMBSTEP SMBSTEP SMBSTEP
PSHSTEP PSHSTEP PSHSTEP PSHSTEP SNRSTEP SNRSTEP SNRSTEP SNRSTEP
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
9
8
7
6
5
4
3
2
Vtt
Vtt
9
8
7
6
5
4
3
2
9
8
7
6
5
4
3
2
9
8
7
6
5
4
3
2
9
8
7
6
5
4
3
2
9
8
7
6
5
4
3
2
9
8
7
6
5
4
3
2
9
8
7
6
5
4
3
2
9
8
7
6
5
4
3
2
7
6
5
4
3
2
1
0
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
15
14
13
12
11
10
9
8
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