LM93 datasheet(79/92 Pages) NSC

79 / 92 page

16.0 Registers (Continued)

16.8.25 Register E3h

LM93 Configuration

Address

Read/

Write

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Default

Value

E3h

R/W

LM93

Configuration

READY

RES

P1P2_

PROCHOT

ALERT

_EN

GMSK

LOCK

START

00h

Lock

Bit

Name

R/W

Description

START

R/W

When this bit is 0, the LM93 operates in basic mode.

All error events are masked. The auto fan control

algorithm is disabled. Both PWMs are set to 0%, but

the Fan Boost function operates based on default

limits. All monitoring functions are active and the

value registers are updated.

Once this bit is set, error events are no longer

globally masked, and the auto-fan control algorithm is

enabled. Fan boost uses the programmed values

instead of the defaults.

It is expected that all limit and setup registers are set

by BIOS or application software prior to setting this

bit.

LOCK

R/W

Setting this bit locks all registers and register bits that

are indicated as lockable. Lockable registers have an

“x”inthe Lock column of their description. This

cleared by an external device asserting RESET.

GMSK

R/W

Global Mask

When this bit is set by software, all error events are

masked. Setting this bit does not effect any other

mask registers or value registers.

ALERT_EN

R/W

When this bit is set, the ALERT output is enabled. If

this bit is cleared, the ALERT output is disabled.

P1P2_

PROCHOT

R/W

In some configurations it may be required to have

both processors throttling at the same rate. When this

bit is set, the LM93 connects P1_PROCHOT to

P2_PROCHOT. If P1_PROCHOT and P2_PROCHOT

are already shorted by some other means, this bit

should NOT be set. Doing so would cause both

PROCHOT signals to be stuck low until this bit is

cleared.

6:5

RES

R/W

Reserved

READY

The LM93 sets this bit automatically after valid data

has been collected for all temperatures and voltages.

Software should not use any temperature or voltage

values until this bit has been set.

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