LPC47M172 SMSC Corporation, LPC47M172 Datasheet - Page 148

• Manufacturer Part Number: LPC47M172
• Description: ADVANCED I/O CONTROLLER WITH MOTHERBOARD GLUE LOGIC
• Manufacturer: SMSC Corporation

Advanced I/O Controller with Motherboard GLUE Logic
Datasheet
SMSC/Non-SMSC Register Sets (Rev. 02-27-04)
No
No
No
The following figure shows a flowchart of the logic.
Main Power
End of Power Up Sequence
Start of Suspend Power Up
LATCHED_BF_CUT = 0
nBACKFEED_CUT = 1?
nBACKFEED_CUT = 0?
Power Rails Stabilized?
nBACKFEED_CUT = 0
Active
(Controlled by ICH)
(Verified by ICH)
nSLP_S5 = 0
nSLP_S5 = 1
(Period T2)
(Period T1)
Sequence
Yes
Yes
Yes
Figure 7.20 - Latched Backfeed Cut Flowchart
DATASHEET
No
Page 148
nBACKFEED_CUT = 0?
LATCHED_BF_CUT = 0
(After Tpropf)
No
Yes
No
nBACKFEED_CUT = 1?
LATCHED_BF_CUT = 1
nSLP_S5 = 0?
(After Tpropr)
Yes
No
LATCHED_BF_CUT = 0
(Controlled by nSLP_S3
nBACKFEED_CUT = 0
(This is end of T3)
and PWRGD_PS)
nSLP_S5 = 1?
(After Tpropf)
Yes
Period T4
Yes
SMSC LPC47M172