ADM1031 datasheet(28/32 Pages) AD

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ADM1031

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Table XXIV. Register 0x25 Remote 1 Temp TMIN/TRANGE Power-On Default = 61H

Bit

Name

Description

<7:3>

Remote 1 Temp TMIN

Read/Write

Contains the minimum temperature value for Automatic Fan Speed Control

based on Remote 1 Temperature Readings. TMIN can be programmed to

positive values only in 4

°C increments. Default is 48°C.

00000 = 0

°C

00001 = 4

°C

00010 = 8

°C

00011 = 12

°C

01100 = 48

°C (Default)

11110 = 120

°C

11111 = 124

°C

<2:0>

Remote 1 Temp TRANGE

Read/Write

This nibble contains the temperature range value for Automatic Fan Speed

Control based on the Remote 1 Temp Readings.

000 = 5

°C

001 = 10

°C (Default)

010 = 20

°C

011 = 40

°C

100 = 80

°C

Table XXV. Register 0x26 Remote 2 Temp TMIN/TRANGE Power-On Default = 61H

Bit

Name

Description

<7:3>

Remote 2 Temp TMIN

Read/Write

Contains the minimum temperature value for Automatic Fan Speed Control

based on Remote 2 Temperature Readings. TMIN can be programmed to

positive values only in 4

°C increments. Default is 48°C.

00000 = 0

°C

00001 = 4

°C

00010 = 8

°C

00011 = 12

°C

01100 = 48

°C (Default)

11110 = 120

°C

11111 = 124

°C

<2:0>

Remote 2 Temp TRANGE

Read/Write

This nibble contains the temperature range value for Automatic Fan Speed

Control based on the Remote 2 Temp Readings.

000 = 5

°C

001 = 10

°C (Default)

010 = 20

°C

011 = 40

°C

100 = 80

°C

Table XXVI. Register 0x3F Therm Behavior/Revision Power-On Default = 80H

Bit

Name

Description

<7>

Therm-to-Fan En

Read/Write

Setting this bit to 1, enables the fan to run full-speed when

THERM is

asserted low. This allows the system to be run in performance mode. Clear-

ing this bit to 0 disables the fan from running full-speed whenever

THERM

is asserted low. This allows the system to run in silent mode. (Power-On

Default = 1).

<3:0>

Revision

Read Only

This nibble contains the revision number for the ADM1031.

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