LM81 datasheet(25/32 Pages) NSC

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Functional Description (Continued)

13.3 Configuration Register — Address 40h

Power on default – <7:0> = 00001000 binary

Bit

Name

Read/

Write

Description

Start

Read/Write

A one enables startup of monitoring operations, a zero puts the part in standby mode.

Note: The outputs of Interrupt pins will not be cleared if the user writes a zero to this

location after an interrupt has occurred unlike “INT_Clear” bit.

At start up, limit checking functions and scanning begin. Note, all limits should be set

in the Value RAM before setting this bit HIGH.

INT Enable

Read/Write

A one enables the INT Interrupt output.

Reserved

Read/Write

INT_Clear

Read/Write

A one disables the INT output without affecting the contents of Interrupt Status

Registers. The device will stop monitoring. It will resume upon clearing of this bit.

RESET

Read/Write

A one outputs at least a 20 ms active low reset signal at RESET. This bit is cleared

once the pulse has gone inactive.

Reserved

Read/Write

CI_Clear

Read/Write

A one outputs a minimum 20 ms active low pulse on the CI pin. The register bit self

clears after the pulse has been output. This bit is mirrored in the CI Clear Register bit

INITIALIZATION

Read/Write

A one restores power on default value to the Configuration Register, Interrupt Status

Registers, Interrupt Mask Registers, CI Clear Register, VID/Fan Divisor Register,

VID4, Temperature Configuration Register, and the Extended Mode Registers. This bit

clears itself since the power on default is zero.

LM81 Datasheet(PDF) 25 Page - National Semiconductor (TI)