LPC47N237-MD View Datasheet(PDF) - SMSC -> Microchip

Part Name

Description

Manufacturer

LPC47N237-MD

3.3v I/O Controller for Port Replicators and Docking Stations

SMSC -> Microchip 

3.3v I/O Controller for Port Replicators and Docking Stations

4.2

Pins That Require External Resistors

The following pins require external pull-up resistors:

ƒ LAD[3:0]

ƒ nLDRQ

ƒ SER_IRQ

ƒ nCLKRUN

ƒ nIO_PME if used as Open Drain Output

ƒ nALF if used as Open Drain Output

ƒ nSTROBE if used as Open Drain Output

ƒ nINIT if used as Open Drain Output

ƒ nSLCTIN if used as Open Drain Output

ƒ SMB_A0 – this pin has weak internal pull-down. External pull-up can be used to change the LSB of

SMBus device address.

ƒ SDAT

ƒ SCLK

ƒ nSMBINT

ƒ SDAT_1

ƒ SCLK_1

ƒ SDAT_2

ƒ SCLK_2

The following pin requires external pull-up/pull-down resistor:

ƒ LGP47 (SYSOPT) – pull-up or pull-down is required for SYSOPT strap option to set system base IO

address.

ƒ GPIOs

SMSC DS – LPC47N237

Page 19

DATASHEET

Revision 0.3 (10-26-04)

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