LPC47M182 datasheet(23/223 Pages) SMSC

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Advanced I/O Controller with Motherboard GLUE Logic

Datasheet

SMSC LPC47M182

Revision 1.8 SMSC/Non-SMSC Register Sets (02-24-05)

DATASHEET

3.1

Buffer Name Descriptions

Note:

Refer to the “Electrical Characteristics” section.

PWR

Power and Ground

Input TTL Compatible.

IPU

Input with 30uA Integrated Pull-Up

IPD

Input with 30uA Integrated Pull-Down

Input with 250mV Schmitt Trigger.

IS_400

Input with 400mV Schmitt Trigger.

ISPU_400

Input with 400mV Schmitt Trigger and 30uA Integrated Pull-Up.

ISPD_400

Input with 400mV Schmitt Trigger and 30uA Integrated Pull-Down.

Output, 8mA sink, 4mA source.

OD8

Output (Open Drain), 8mA sink.

O12

Output, 12mA sink, 6mA source.

OD12

Output (Open Drain), 12mA sink.

OP14

Output, 14mA sink, 14mA source.

OD24

Output (Open Drain), 24mA sink.

Output – Analog with 5V Level

IO8

Input/Output, 8mA sink, 4mA source.

ISO8

Input with 250mV Schmitt Trigger /Output, 8mA sink, 4mA source.

ISOD8

Input with 250mV Schmitt Trigger, Low Leakage/Output (Open-Drain), 8mA sink.

IO12

Input with Schmitt Trigger/Output, 12mA sink, 6mA source.

IOP14

Input/Output, 14mA sink, 14mA source.

IOD24

Input/Output (Open Drain), 24mA sink.

IO_SW

Input/Output, special type. Pins of this type are connected in pairs through a switch. The switch

provides a 25 ohm (max) resistance to ground when closed.

PCI_IO

Input/Output. These pins meet the PCI 3.3V AC and DC Characteristics. (Note 1)

PCI_O

Output. These pins meet the PCI 3.3V AC and DC Characteristics. (Note 1)

PCI_I

Input. These pins meet the PCI 3.3V AC and DC Characteristics. (Note 1)

PCI_ICLK

Clock Input. These pins meet the PCI 3.3V AC and DC Characteristics and timing. (Note 2)

Note 1:

See the “PCI Local Bus Specification,” Revision 2.1, Section 4.2.2.

Note 2:

See the “PCI Local Bus Specification,” Revision 2.1, Section 4.2.2 and 4.2.3.

3.2

Pins With Internal Resistors

The following pins have internal resistors:

Table 3.2 – Pins with Internal Resistors

SIGNAL NAME

RESISTOR VALUE

NOTES

nCPU_PRESENT

30uA

Pull-up to VTR

nFPRST

30uA

Pull-up to VTR

nPRIMARY_HD

30uA

Pull-up to VCC

PWRGD_PS

30uA

Pull-up to VTR

nSCSI

30uA

Pull-up to VCC

nSECONDARY_HD

30uA

Pull-up to VCC

TEST_EN

30uA

Pull-down to VSS

LPC47M182 Datasheet(PDF) 23 Page - SMSC Corporation

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