NCT7491RQR2G【PDF 66/80 页】IC REMOTE THERMAL MONITOR 24QSOP

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NCT7491

http://onsemi.com

Table 103. REGISTER 0x87 Configuration 9 (PowerOn Default = 0x00)

Bit

Name

R/W

Description

<0>

PWM1OFF

R/W

1= Disables PWM1

<1>

PWM2OFF

R/W

1= Disables PWM2

<2>

PWM3OFF

R/W

1 = Disables PWM3

<3>

Reserved

<4>

D0V

R/W

1 = DIMM0 is populated, must be set to enable DIMM0 temperature to be written to CPU

<5>

D1V

R/W

1 = DIMM1 is populated, must be set to enable DIMM1 temperature to be written to CPU

<6>

D2V

R/W

1 = DIMM2 is populated, must be set to enable DIMM2 temperature to be written to CPU

<7>

D3V

R/W

1 = DIMM3 is populated, must be set to enable DIMM3 temperature to be written to CPU

Table 104. REGISTER 0x88 PECI Configuration Register 2 (PowerOn Default = 0x00)

Bit

Name

R/W

Description

<2:0>

RES

RESERVED

<3>

DOM3

R/W

CPU Domain Count information. Set to 0 indicates that CPU 4 associated with the PECI3 reading has

a single domain (Default). Set to 1 indicates that the system CPU4 contains two domains.

<4>

DOM2

R/W

CPU Domain Count information. Set to 0 indicates that CPU 3 associated with the PECI2 reading has

a single domain (Default). Set to 1 indicates that the system CPU3 contains two domains.

<5>

DOM1

R/W

CPU Domain Count information. Set to 0 indicates that CPU 2 associated with the PECI1 reading has

a single domain (Default). Set to 1 indicates that the system CPU2 contains two domains.

<7:6>

#CPU

R/W

CPU Count. These bits indicate the number of CPUs in the system. That will provide PECI thermal

information to the NCT7491.

00 = 1 CPU

01 = 2 CPUs

10 = 3 CPUs

11 = 4 CPUs

Table 105. REGISTER 0x89 Interrupt Status 7 (PowerOn Default = 0x00)

Bit

Name

R/W

Description

<0>

OVT0

1 = PECI0 Tcontrol exceeded

<1>

OVT1

1 = PECI1 Tcontrol exceeded

<2>

OVT2

1 = PECI2 Tcontrol exceeded

<3>

OVT3

1 = PECI3 Tcontrol exceeded

<4>

OVT_R1

1 = Remote1 THERM exceeded

<5>

OVT_LOC

1 = Local THERM exceeded

<6>

OVT_R2

1 = Remote2 THERM exceeded

<7>

OOL11

1 indicates an out of limit condition in register 0xBB

Table 106. REGISTER 0x8A PWM1 Source Control 1 (PowerOn Default = 0x08)

Bit

Name

R/W

Description

<0>

LOC

R/W

Logic 1 enables Local temperature to control PWM1 in automatic fan control loop

<1>

REM1

R/W

Logic 1 enables Remote1 temperature to control PWM1 in automatic fan control loop

<2>

REM2

R/W

Logic 1 enables Remote2 temperature to control PWM1 in automatic fan control loop

<3>

PEC0

R/W

Logic 1 enables PECI0 temperature to control PWM1 in automatic fan control loop

<4>

PEC1

R/W

Logic 1 enables PECI1 temperature to control PWM1 in automatic fan control loop

<5>

PEC2

R/W

Logic 1 enables PECI2 temperature to control PWM1 in automatic fan control loop

<6>

PEC3

R/W

Logic 1 enables PECI3 temperature to control PWM1 in automatic fan control loop

<7>

Reserved

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