F81866A
Power saving mode would be activated via CR0A index E0 bit 7.
6.8.1.3 AC Loss & Resume Control Methods
There are 4 modes under power loss state via setting ACPI control register. The always on, always off,
keep last state & bypass mode. In keep last state mode, one register will latch the status before power
loss. If it is power on before power loss, it will automatically power on when power is resumed. If it is
power off before power loss, it will remain power off when power is resumed. See below for the detail:
Mode
Explanation
When AC resume, the system will power on automatically (send a PWSOUT# low pulse and
then sinking the PS_ON# low). See below for the timing:
S5
S0
S5
S0
S5
VBAT
VSB
RSMRST#
S3#
Always on
(S0)
PS_ON#
PSIN#
PSOUT#
VCC3V
When AC resume, the system is in off state and waiting for the wakeup events. See below for
the timing:
G3
S0
S5
S0
S5
VBAT
VSB
RSMRST#
S3#
Always off
(S5)
PS_ON#
PSIN#
PSOUT#
VCC3V
User press the button
Bypass
(follow the
chipset after
When AC resume, inverting the S3 signal to PS_ON#. See below for the timing:
96
Jan, 2012
V0. 12P
FINTEK [ FEATURE INTEGRATION TECHNOLOGY INC. ]
