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ADM1029

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STATUS REGISTERS

Bit

Name

R/W

Description

INT

This bit is set to 1 when the device is asserting

INT low. This bit is the logical

OR of several bits in other registers and is cleared when these bits are cleared.

CFAULT_in

This bit is set to 1 when the device is receiving

CFAULT low from another device.

CFAULT_out

This bit is set to 1 when the device is asserting

CFAULT low. This bit is

the logical OR of several bits in other registers and is cleared when these

bits are cleared.

In Alarm_speed

This bit is set to 1 when either fan is running at Alarm Speed. This bit is the

logical OR of several bits in other registers and is cleared when these bits are

cleared.

In Hot-Plug Speed

This bit is set to 1 when either fan is running at Hot-Plug Speed. This bit is

the logical OR of several bits in other registers and is cleared when these bits

are cleared.

GPIO/AIN Event

This bit is a logical OR of Bits 1, 3, 6, and 7 in the GPIO Behavior Registers

at 28h to 2Eh while they are configured as inputs, and Bit 7 in the AIN

Behavior Registers at 50h and 51h. It will be set when any of these bits are set

and cleared when all of these bits are cleared.

Hot Plug/Fan Fault

This bit is a logical OR of Bits 1, 3, 6, and 7 in the Fan Status Registers at

10h and 11h. It will be set when any of these bits are set and cleared when all

of these bits are cleared.

Thermal Event

This bit is a logical OR of Bit 7 in the Temp Fault Action Registers at 40h,

41h, and 42h. It will be set when any of these bits are set and cleared when all

of these bits are cleared.

Bit

Name

R/W

Description

Fan 1 = 1

This bit set to 1 means the ADM1029 can support Fan 1.

Fan 2 = 1

This bit set to 1 means the ADM1029 can support Fan 2.

Reserved

Unused. Will read back 0.

Reserved

Unused. Will read back 0.

Reserved

Unused. Will read back 0.

Reserved

Unused. Will read back 0.

Reserved

Unused. Will read back 0.

Reserved

Unused. Will read back 0.

Bit

Name

R/W

Description

Fan 1 = 1

R/W

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

written by software.

Fan 2 = ?

R/W

Indicates that Fan 2 is being used. Set by Pin 18 (TMIN/INSTALL) on

Power-up, but can be overwritten by software.

Reserved

Unused. Will read back 0.

Reserved

Unused. Will read back 0.

Reserved

Unused. Will read back 0.

Reserved

Unused. Will read back 0.

Reserved

Unused. Will read back 0.

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 Datasheet(PDF) 33 Page - Analog Devices

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