ADM1029ARQZ-R7 datasheet(32/50 Pages) ONSEMI

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CONFIGURATION REGISTERS

Bit

Name

R/W

Description

Install = ?

R/W

This bit reflects Bit 1 of Register 0x03 (Fans Supported In System).

Global INT mask = 0

R/W

Setting this bit to 1 will disable the INT output for all interrupt sources.

ARA Disable = 0

R/W

Setting this bit to 1 will disable the SMBus Alert Response Address feature.

Perform Free-Wheel

R/W

Setting this bit to 1 will initiate the Fan Free-Wheeling Test. While this test

Test = 0

is being performed normal monitoring of fan speeds, temperature and volt-

ages will be temporarily halted. This bit will automatically reset to 0 once the

test is complete which will take about 10 seconds.

Start Monitoring = 0

R/W

Set to 1 to start round robin monitoring cycle of voltage temperature and fan

speeds, fault detection, etc. While this bit is 0, all fans will run at Alarm

Speed. This bit is set at power-up; otherwise, if automatic fan speed control

is enabled by Pin 18.

Force CFAULT = 0

R/W

Setting this bit to 1 forces CFAULT to be asserted (Low).

Force INT = 0

R/W

Setting this bit to 1 forces INT to be asserted (Polarity depends on Bit 7).

INT Polarity = 0

R/W

Polarity of INT when asserted. 1 means High and 0 means Low.

NOTE

Question marks on this and following pages indicate bit settings that depend on the state of certain pins on power-up.

Bit

Name

R/W

Description

GPIO 0 = 1

R/W

Indicates that GPIO0 is being used. Set to 1 on power-up, but can be over-

written by software. Setting this bit to 0 means AIN0 is being used.

GPIO 1 = 1

R/W

Indicates that GPIO1 is being used. Set to 1 on power-up, but can be over-

written by software. Setting this bit to 0 means AIN1 is being used.

GPIO 2 = 1

R/W

Indicates that GPIO2 is being used. Set to 1 on power-up, but can be over-

written by software.

GPIO 3 = ?

R/W

Indicates that GPIO3 is being used. Setting this bit to 0 means TDM1 is

being used. The ADM1029 can detect on power-up if TDM1 is connected.

If so, this bit is set to 0, otherwise it is set to 1. The default setting can be

overwritten by software.

GPIO 4 = ?

R/W

Indicates that GPIO4 is being used. Setting this bit to 0 means TDM1 is

being used. The ADM1029 can detect on power-up if TDM1 is connected.

If so, this bit is set to 0, otherwise it is set to 1. The default setting can be

overwritten by software.

GPIO 5 = ?

R/W

Indicates that GPIO5 is being used. Setting this bit to 0 means TDM2 is

being used. The ADM1029 can detect on power-up if TDM2 is connected.

If so, this bit is set to 0, otherwise it is set to 1. The default setting can be

overwritten by software.

GPIO 6 = ?

R/W

Indicates that GPIO6 is being used. Setting this bit to 0 means TDM2 is

being used. The ADM1029 can detect on power-up if TDM2 is connected.

If so, this bit is set to 0, otherwise it is set to 1. The default setting can be

overwritten by software.

Reserved

Unused. Will read back 0.

NOTE

Question marks on this and following pages indicate bit settings that depend on the state of certain pins on power-up.

ADM1029

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