W83627EHF Datasheet, PDF (139/141 Pages) Winbond – evolving product from Winbonds most popular I/O family

W83627EHF/EF, W83627EHG/EG
1) Last state is “ON”
VCC is falling to 2.6V and SUSB# keeps VIH 2.0V
VCC
SUSB#
2) Last state is “OFF”
VCC is falling to 2.6V and SUSB# keeps VIL 0.8V
VCC
SUSB#
To prevent that VCC goes down faster than VSB in various ATX Power Supply.
W83627EHF/EF,W83627EHG/EG add the “user define mode” option for AC power loss pre-state.
BIOS can set the pre-state that is “On” or “Off” state, because the status of AC power resume
depends on it.
CR E4h
6~5
R/W
Power loss control bits => (VBAT)
00: System always turns off when come back from power loss state.
01: System always turns on when come back from power loss state.
10: System turns off / on when come back from power loss state depend
on the state before power loss.
11: User define the state before power loss.(The last state set at CRE6[4])
CR E6h
4
R/W
Power loss Last State Flag. (VBAT)
0: ON
1: OFF
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Publication Release Date: January 18, 2006
Revision 1.0