ADM1024

–27–

REV. 0

Table XVII. Register 4AH, Configuration Register 2 (Power-On Default [7:0] = 0x00h)

Bit

Name

R/

W

Description

0

Thermal

INT

Read/

Write

Setting this bit masks the thermal interrupts for the

INT output ONLY. The

Mask

THERM output will still be generated, regardless of the setting of this bit.

1

Ambient Temp

Read/

Write

Writing a one to this bit will lock in the values set into the ambient tempera-

Fan Control

Once

ture automatic fan control register 13h. This register will not be able to be

Register Write

written again until a reset is performed (either POR, Hard or Soft Reset).

Once Bit

2

Remote Temp

Read/

Write

Writing a one to this bit will lock in the values set into the remote tempera-

Fan Control

Once

ture automatic fan control register 14h. This register will not be able to

Register Write

be written again until a reset is performed (either POR, Hard or Soft Reset).

Once Bit

3

THERM

Read/

Write

If this bit is 0 the

THERM output operates in default mode.

Interrupt Mode

If this bit is 1, the

THERM output operates in ACPI mode.

4, 5

Reserved

Read Only

Reserved.

6

IRQ3 EN

Read/

Write

Setting this bit to 1 enables Pin 21 as an active high interrupt input, provided

Pins 20 to 24 have been configured as interrupts by setting Bit 7 of the

Channel Mode Register. Power-on default = 0.

7

IRQ4 EN

Read/

Write

Setting this bit to 1 enables Pin 20 as an active high interrupt input, provided

Pins 20 to 24 have been configured as interrupts by setting Bit 7 of the

Channel Mode Register. Power-on default = 0.

Table XVIII. Register 4Ch, Interrupt Status Register 1 Mirror (Power-On Default <7:0> = 00h)

Bit

Name

R/

W

Description

0

2.5 V/Ext. Temp2 Error

Read Only

A one indicates that a High or Low limit has been exceeded.

Read Only

A one indicates that a High or Low limit has been exceeded.

Read Only

A one indicates that a High or Low limit has been exceeded.

3

5 V Error

Read Only

A one indicates that a High or Low limit has been exceeded.

4

Internal Temp Error

Read Only

A one indicates that a temperature interrupt has been set, or that a High or

Low limit has been exceeded.

5

External Temp1 Error

Read Only

A one indicates that a temperature interrupt has been set, or that a High or

Low limit has been exceeded.

6

FAN1/AIN1 Error

Read Only

A one indicates that a High or Low limit has been exceeded.

7

FAN2/AIN2 Error

Read Only

A one indicates that a High or Low limit has been exceeded.

Table XIX. Register 4DH, Interrupt Status Register 2 Mirror (Power-On Default <7:0> = 00h)

Bit

Name

R/

W

Description

0

12 V Error

Read Only

A one indicates a High or Low limit has been exceeded.

Read Only

A one indicates a High or Low limit has been exceeded.

2

Reserved

Read Only

Undefined.

3

Reserved

Read Only

Undefined.

4

Chassis Error

Read Only

A one indicates Chassis Intrusion has gone high.

5

THERM Interrupt

Read Only

Indicates that

THERM pin has been pulled low by an external source.

6

D1 Fault

Read Only

Short or open-circuit sensor diode D1.

7

D2 Fault

Read Only

Short or open-circuit sensor diode D2.

NOTE

An error that causes continuous interrupts to be generated may be masked in its respective mask register, until the error can be alleviated.