LAN91C96-MS datasheet(19/125 Pages) SMSC

19 / 125 page

Non-PCI Single-Chip Full Duplex Ethernet Controller with Magic Packet

SMSC LAN91C965v&3v

Page 19

Rev. 03-28-07

DATASHEET

PIN NO.

TQFP

QFP

PIN NAME

TYPE

DESCRIPTION

nEN16

I with

pullup

Input. When low the LAN91C96 is configured for 16 bit

bus operation. If left open the LAN91C96 works in 8 bit

bus mode. 16 bit configuration can also be

programmed via serial EEPROM or software

initialization of the CONFIGURATION REGISTER.

XTAL1

Iclk

An external parallel resonance 20MHz crystal should

be connected across these pins. If an external clock

source is used, it should be connected to this pin

(XTAL1) and XTAL2 should be left open.

XTAL2

Iclk

An external parallel resonance 20MHz crystal should

be connected across these pins. If an external clock

source is used, it should be connected to XTAL1 and

this pin (XTAL2) should be left open.

RECP/

RECN

Diff. Input

AUI receive differential inputs.

TXP/nCOLL

TXN/nCRS

Diff.

Output

INTERNAL ENDEC - (nXENDEC pin open). In this

mode TXP and TXN are the AUI transmit differential

outputs. They must be externally pulled up using 150

ohm resistors.

EXTERNAL ENDEC - (nXENDEC pin tied low). In this

mode the pins are inputs used for collision and carrier

sense functions.

COLP

COLN

Diff.

Input

AUI collision differential inputs. A collision is indicated

by a 10MHz signal at this input pair.

TPERXP

TPERXN

Diff.

Input

10BASE-T receive differential inputs.

TPETXP

TPETXN

Diff.

Output

INTERNAL ENDEC - 10BASE-T transmit differential

outputs.

TPETXDP

TPETXDN

Diff.

Output

10BASE-T delayed transmit differential outputs. Used

in combination with TPETXP and TPETXN to generate

the 10BASE-T transmit pre-distortion.

PWRDWN/

TXCLK

I with

pullup

INTERNAL ENDEC - Powerdown input. It keeps the

LAN91C96 in powerdown mode when high (open).

Must be low for normal operation.

EXTERNAL ENDEC - Transmit clock input from

external ENDEC.

RBIAS

Analog

Input

A resistor should be connected between this pin and

analog ground to determine the receive threshold

voltage of TX Receive, AUI Receive, AUI Collision

Receive, and AUI transmit voltage.

nXENDEC

I with

pullup

When tied low the LAN91C96 is configured for

EXTERNAL ENDEC. When tied high or left open the

LAN91C96 will use its internal encoder/decoder.

11,19,

48,59,

98,38

13,21,40,

50,

61,100

VDD

+5V power supply pins or 3.3V power supply pins

(Revisions E and later)

71,79,

73,81,

AVDD

+5V analog power supply pins or 3.3V power supply

pins (Revisions E and later)

LAN91C96-MS Datasheet(PDF) 19 Page - SMSC Corporation

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