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LPC47M172-NR

Advanced I/O Controller with Motherboard GLUE Logic

SMSC -> Microchip 

Advanced I/O Controller with Motherboard GLUE Logic

Datasheet

PIN#

73

74

75

77

79

80

81

82

83

84

85

86

87

88

89

90

92

100

101

102

113

114

115

116

94

95

103-

105

NAME

(NOTE 1)

nPCIRST_OUT

nPCIRST_OUT

2

nFPRST

nBACKFEED_

CUT

LATCHED_BF_

CUT

SCK_BJT_

GATE

nPS_ON

PWRGD_PS

nCPU_PRESENT

PWRGD_3V

nSLP_S3

nSLP_S5

SMB_CLK_M

SMB_CLK_R

SMB_DAT_M

SMB_DAT_R

nRSMRST

nAUD_LINK_

RST

nCDC_DWN_

ENAB/GP24

nCDC_DWN_

RST

DDCSCL_3V/

GP23

DDCSCL_5V/

GP21

DDCSDA_3V/

GP22

DDCSDA_5V/

GP20

GRN_LED

YLW_LED

GP10-GP12

DESCRIPTION

Buffered PCI Reset Output

Second Buffered PCI Reset Output

BUFFER

NAME

(NOTE 2)

OP14

OP14

Reset Input from Front Panel

ISPU_400

Open-Drain Output used for STR Circuitry OD8

Latched Backfeed Cut Output for STR

Circuitry

Open-Drain Gate Output for the SCK_BJT

in Suspend-to-RAM

Power Supply Turn-ON Open Drain

Output

Power Good Input from Power Supply

CPU Present Input from Processor

Power Good Output

S3 Power State Input from South Bridge

Input from South Bridge for Transitioning

to the S5 Power State

SMBus Clock Main

SMBus Clock Resume

SMBus Data Main

SMBus Data Resume

Resume Reset Output

AC97 Link Reset Input

OP14

OD8

OD8

ISPU_400

ISPU_400

O8

IS_400

IS_400

IO_SW

IO_SW

IO_SW

IO_SW

O8

I

AC97 Codec Down Enable Input.

General Purpose I/O. GPIO can be

configured as an open-drain output.

AC97 Codec Down Reset Output.

IO12

O12

3.3V DDC Clock

General Purpose I/O. GPIO can be

configured as an open-drain output.

IO_SW/IS

OD8

5V DDC Clock

General Purpose I/O. GPIO can be

configured as an open-drain output.

IO_SW/IS

OD8

3.3V DDC Data

General Purpose I/O. GPIO can be

configured as an open-drain output.

IO_SW/IS

OD8

5V DDC Data

General Purpose I/O. GPIO can be

configured as an open-drain output.

IO_SW/IS

OD8

POWER LEDS (2)

Green Power LED Open-Drain Output

OD24

Yellow Power LED Open-Drain Output

OD24

GENERAL PURPOSE I/O (8)

General Purpose I/O. GPIO can be

configured as an open-drain output.

ISO8

PWR

WELL

(NOTE 3)

VTR

VTR

NOTES

VTR

VTR

3

VTR

VTR

3

VTR

3

VTR

VTR

VTR

VTR

VTR

VTR

VTR

VTR

VTR

VTR

VTR

VTR

6

VTR

VTR

3, 6, 8

VTR

3, 6, 8

VTR

3, 6, 8

VTR

3, 6, 8

VTR

VTR

VTR

6

SMSC/Non-SMSC Register Sets (Rev. 02-27-04)

Page 21

DATASHEET

SMSC LPC47M172

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