W83627DHG-PT Nuvoton Technology Corporation of America, W83627DHG-PT Datasheet - Page 188

• Manufacturer Part Number: W83627DHG-PT
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of W83627DHG-PT

• Pin Count: 128
• Lead Free Status / RoHS Status: Compliant

15.1.2 AC Power Failure Resume
By definition, AC power failure means that the standby power is removed. The power failure resume
control logic of the W83627DHG-P 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:
Note1. The W83627DHG-P detects the state before power failure (on or off) through the SUSB# signal and the
3VCC power. The relation is illustrated in the following two figures.
(Other Chipset)
(Intel Chipset)
SLP_S3#
PSOUT#
S3#
PSON#
PSIN#
3VSB
LOGICAL DEVICE A,
CR[E4H], BITS[6:5]
G3
Figure 15-2 Power Sequence from S5 to S0, then Back to S5
Table 15-1 Bit Map of Logical Device A, CR [E4h], Bits [6:5]
00
01
10
11
T2
T1
S5
W83627DHG-P/W83627DHG-PT
T3
-178-
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)
Publication Release Date: July 09, 2009
DEFINITION
S0
T4
Version 1.94
S5