W83627UHG Nuvoton Technology Corporation of America, W83627UHG Datasheet - Page 215

• Manufacturer Part Number: W83627UHG
• Description: IC I/O CONTROLLER 128-QFP
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627UHG

• Applications: PC's, PDA's
• Interface: LPC
• Voltage - Supply: 3.3V, 5V
• Package / Case: 128-XFQFN
• Mounting Type: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

** What’s the definition of last state when AC power failure?
1) Last state is “ON”
2) Last state is “OFF”
Logical Device A, CR E6h
Logical Device A, CR E4h
To prevent that VCC goes down faster than VSB in various ATX Power Supplies. W83627UHG 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.
6~5
5VCC is falling to 3.75V and SUSB# keeps VIL 0.8V
4
SUSB#
5VCC
5VCC
SUSB#
5VCC is falling to 3.75V and SUSB# keeps VIH 2.0V
R / W
R / W
Power loss Last State Flag. (VBAT)
0: ON
1: OFF
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
11: User define the state before power loss.(The last state set at CRE6[4])
on the state before power loss.
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W83627UHG