NCT6627UD Nuvoton Technology Corporation of America, NCT6627UD Datasheet - Page 155

• Manufacturer Part Number: NCT6627UD
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of NCT6627UD

• Lead Free Status / Rohs Status: Supplier Unconfirmed

The W83627UHG generates a low pulse through the PSOUT# pin to wake up the system when it detects a key
code pressed or mouse button clicked. The following sections describe how the W83627UHG works.
13.2.1
13.2 Wake Up the System by Keyboard and Mouse
Logical Device A, CR[E6h]
Note1. The W83627UHG detects the state before power failure (on or off) through the SUSB# signal and the 5VCC
power. The relation is illustrated in the following two figures.
5VCC
SUSB#
To ensure that VCC does not fall faster than VSB in various ATX Power Supplies, the W83627UHG 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 is returned to the pre-defined state after the AC power
recovery.
Waken up by Keyboard events
Note 2.
5VCC
SUSB#
bit [4]
0
1
The previous state is “on”, if 5VCC falls to 3.75V and SUSB# keeps at 2.0V.
The previous state is “off”, if 5VCC falls to 3.75V and SUSB# keeps at 0.8V.
User defines the state to be “on”
User defines the state to be “off”
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Definition
W83627UHG/NCT6627UD
Publication Release Date: October 26, 2010
Revision 1.7