Advanced I/O Controller with Motherboard GLUE Logic
Datasheet
BUFFER
NAME
PWR
WELL
NAME
PIN#
73
DESCRIPTION
NOTES
(NOTE 1)
(NOTE 2)
(NOTE 3)
nPCIRST_OUT Buffered PCI Reset Output
nPCIRST_OUT Second Buffered PCI Reset Output
OP14
OP14
VTR
VTR
74
2
75
77
nFPRST
Reset Input from Front Panel
Open-Drain Output used for STR Circuitry OD8
ISPU_400
VTR
VTR
nBACKFEED_
3
CUT
79
80
81
LATCHED_BF_ Latched Backfeed Cut Output for STR
OP14
VTR
VTR
VTR
CUT
Circuitry
SCK_BJT_
Open-Drain Gate Output for the SCK_BJT OD8
3
3
GATE
in Suspend-to-RAM
nPS_ON
Power Supply Turn-ON Open Drain
Output
OD8
82
83
84
PWRGD_PS
Power Good Input from Power Supply
CPU Present Input from Processor
ISPU_400
ISPU_400
O8
VTR
VTR
VTR
nCPU_PRESENT
PWRGD_PLAT Power Good Output
FORM
85
86
nSLP_S3
nSLP_S5
S3 Power State Input from South Bridge
IS_400
IS_400
VTR
VTR
Input from South Bridge for Transitioning
to the S5 Power State
87
88
89
90
92
100
SMB_CLK_M
SMB_CLK_R
SMB_DAT_M
SMB_DAT_R
nRSMRST
SMBus Clock Main
SMBus Clock Resume
SMBus Data Main
SMBus Data Resume
Resume Reset Output
AC97 Link Reset Input
IO_SW
IO_SW
IO_SW
IO_SW
O8
VTR
VTR
VTR
VTR
VTR
VTR
nAUD_LINK_
I
RST
101
nCDC_DWN_
ENAB/GP24
AC97 Codec Down Enable Input.
IO12
VTR
6
General Purpose I/O. GPIO can be
configured as an open-drain output.
102
113
nCDC_DWN_
RST
DDCSCL_3V/
GP23
AC97 Codec Down Reset Output.
3.3V DDC Clock
O12
VTR
VTR
IO_SW/ISOD8
3, 6, 8
3, 6, 8
3, 6, 8
3, 6, 8
General Purpose I/O. GPIO can be
configured as an open-drain output.
114
115
116
DDCSCL_5V/
GP21
5V DDC Clock
IO_SW/ISOD8
IO_SW/ISOD8
IO_SW/ISOD8
VTR
VTR
VTR
General Purpose I/O. GPIO can be
configured as an open-drain output.
DDCSDA_3V/
GP22
3.3V DDC Data
General Purpose I/O. GPIO can be
configured as an open-drain output.
DDCSDA_5V/
GP20
5V DDC Data
General Purpose I/O. GPIO can be
configured as an open-drain output.
POWER LEDS (2)
Green Power LED Open-Drain Output
Yellow Power LED Open-Drain Output
GENERAL PURPOSE I/O (8)
94
95
GRN_LED
YLW_LED
OD24
OD24
VTR
VTR
103-
105
GP10-GP12
General Purpose I/O. GPIO can be
ISO8
VTR
6
configured as an open-drain output.
Revision 1.8 SMSC/Non-SMSC Register Sets (02-24-05)
20
SMSC LPC47M182
DATASHEET
SMSC [ SMSC CORPORATION ]
