Publication Release Date: Jul., 2002

Revision 1.0

6

W83301DR-O

7. Functional Description

7.1 ACPI State Control

In order to meet the ACPI specification, the W83301DR-O implements an internal state

machine to generate ACPI-compliant power state transition.

There are five states in the state machine, the five states are G3 (Mechanical-Off State),

the W83301DR-O also implements soft ramp-up mechanism in each STR outputs during

As the internal state machine, when the power turns on, the voltage of 5VSB of the ATX

When the system in the S0 state, the system will enters the S3 (S3#=0, S5#=1) or S5

(S5#=0) state when the system is idle for a long time or user presses the power button.

When the system enters the S3 state, the system will waked up and enter the S0 state

by (S3#=1, S5#=1,PWOK=1), or gets into S5 state by (S5#=0).

Table 1. W83301DR-O Outputs Table

State

STR1

STR2

LUV Activity *

G3

Off

Off

Off

Off

No

Off

On

Off

Off

No

On

On

Off

Off

No

S0

On

On

On

On

Yes

S3

On

On

On

On

Yes

* Only the STR1 has linear under voltage function.