NCT6627UD Nuvoton Technology Corporation of America, NCT6627UD Datasheet - Page 154

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

Specifications of NCT6627UD

• Lead Free Status / Rohs Status: Supplier Unconfirmed

13.1.2
By definition, AC power failure means that the standby power is removed. The power failure resume control logic
of the W83627UHG is used to recover the system to a pre-defined state after AC power failure. Two control bits at
Logical Device A, CR[E4h], bits[6:5] indicate the pre-defined state. The definition of these two bits is listed in the
following table:
LOGICAL DEVICE A, CR[E4H],
SUSB# (Intel Chipset)
SUSB# (Other Chipset)
PSOUT#
PSIN#
5VSB
PSON#
AC Power Failure Resume
BITS[6:5]
00
01
10
11
Figure 13-2 Power Sequence from S5 to S0, then back to S5.
Table 13-1 Bit Map of Logical Device A, CR[E4h], bits [6:5]
S5 State
System always turns off when it returns from AC power
failure
System always turns on when it returns from AC power
failure
System turns off / on when it returns from power failure
depending on the state before the power failure. (Please
see Note 1)
User defines the state before the power failure. (The
previous state is set at CRE6[4]. Please see Note 2)
-145-
DEFINITION
S0 State
W83627UHG/NCT6627UD
Publication Release Date: October 26, 2010
S5 State
Revision 1.7