W83627DHG Datasheet, PDF (241/268 Pages) Winbond – WINBOND LPC I/O

** What’s the definition of former state at AC power failure?
1) The previous state is “ON”
3VCC falls to 2.6V and SUSB# keeps at VIH 2.0V
3VCC
SUSB#
2) The previous state is “OFF”
3VCC falls to 2.6V and SUSB# keeps at VIL 0.8V
3VCC
SUSB#
W83627DHG
To ensure that VCC does not fall faster than VSB in various ATX Power Supplies, the W83627DHG
adds the option of “user define mode” for the pre-defined state before AC power failure. BIOS can set
the pre-defined state to be “On” or “Off”. According to this setting, the system chooses the state after
the AC power recovery.
Logical Device A, CR E4h
Power-loss control bits => (VBAT)
00: System always turns off when it returns from power-loss state.
01: System always turns on when it returns from power-loss state.
6~5
R/W
10: System turns off / on when it returns from power-loss state depending
on the state before the power loss.
11: User defines the state before the power loss.(The previous state is set
at CRE6[4])
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Publication Release Date: Aug, 22, 2007
Version 1.4