ADM1031

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26

Table 18. Register 0y06 Extended Temperature Resolution Power−On Default = 00H

Bit

Name

R/W

Description

<2:0>

Remote Temp 1

R

Holds extended temperature resolution bits for Remote 1 channel.

<5:3>

Remote Temp 2

R

Holds extended temperature resolution bits for Remote 2 channel.

<7:6>

Local Temp

R

Holds extended temperature resolution bits for local temperature channel.

Table 19. Register 0y20 Fan Characteristics Register 1 Power−On Default = 5DH

Bit

Name

R/W

Description

<2:0>

Fan 1 Spin−Up

R/W

These bits contain the fan spin−up time to allow Fan 1 to overcome its own inertia.

000 = 200 ms

001 = 400 ms

010 = 600 ms

011 = 800 ms

100 = 1 sec

101 = 2 sec (Default)

110 = 4 sec

111 = 8 sec

<5:3>

PWM 1 Frequency

R/W

These bits allow programmability of the nominal PWM 1 output frequency driving Fan 1.

(Default = 31 Hz.)

000 = 11.7 Hz

001 = 15.6 Hz

010 = 23.4 Hz

011 = 31.25 Hz (Default)

100 = 37.5 Hz

101 = 46.9 Hz

110 = 62.5 Hz

111 = 93.5 Hz

<7:6>

Speed Range, N

R/W

Speed range

00 = 1

01 = 2

10 = 4

11 = 8

Table 20. Register 0y21 Fan Characteristics Register 2 Power−On Default = 5H

Bit

Name

R/W

Description

<2:0>

Fan 2 Spin−Up

R/W

These bits contain the fan spin−up time to allow Fan 2 to overcome its own inertia.

000 = 200 ms

001 = 400 ms

010 = 600 ms

011 = 800 ms

100 = 1 sec

101 = 2 sec (Default)

110 = 4 sec

111 = 8 sec

<5:3>

PWM 2 Frequency

R/W

These bits allow programmability of the nominal PWM 2 output frequency driving Fan 1.

(Default = 31 Hz.)

000 = 11.7 Hz

001 = 15.6 Hz

010 = 23.4 Hz

011 = 31.25 Hz (Default)

100 = 37.5 Hz

101 = 46.9 Hz

110 = 62.5 Hz

111 = 93.5 Hz

<7:6>

Speed Range, N

R/W

Speed range

00 = 1

01 = 2

10 = 4

11 = 8