LAN91C100FDTQFP datasheet(10/68 Pages) SMSC

Part #	LAN91C100FDTQFP

Description	FEAST FAST ETHERNET CONTROLLER WITH FULL DUPLEX CAPABILITY

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Manufacturer	SMSC [SMSC Corporation]

Direct Link	http://www.smsc.com

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10 / 68 page

SMSC DS – LAN91C100FD REV. B

Page 10

Rev. 05/31/2000

Table 1 - LAN91C100FD Pin Requirements

FUNCTION

PIN SYMBOLS

NUMBER OF PINS

System Address Bus

A1-A15, AEN, nBE0-nBE3

20

System Data Bus

D0-D31

32

System Control Bus

RESET, nADS, LCLK, ARDY,

nRDYRTN, nSRDY, INTR0-

INTR3, nLDEV, nRD, nWR,

nDATACS, nCYCLE, W/nR,

nVLBUS

17

Serial EEPROM

EEDI, EEDO, EECS, EESK,

ENEEP, IOS0-IOS2

8

RAM Data Bus

RD0-RD31

32

RAM Address Bus

RA2-RA16

15

RAM Control Bus

nROE, nRWE0-nRWE3,

RCVDMA, RDMAH

7

Crystal Oscillator

XTAL1, XTAL2

2

Power

VDD, AVDD

19

Ground

GND, AGND

21

External ENDEC 10 Mbps

TXEN, TXD, CRS, COL, RXD,

TXC, RXC, LBK, nLNK,

nFSTEP, AUISEL, MIISEL

12

Physical Interface 100 Mbps

TXEN100, CRS100, COL100,

RX_DV, RX_ER, TXD0-TXD3,

RXD0-RXD3, MDI, MDO, MCLK

16

Clocks

TX25, RX25

2

Miscellaneous

nCSOUT, nRXDISC

2

TOTAL

205

FIGURE 1 - LAN91C100FD BLOCK DIAGRAM

BUS

INTERFACE

UNIT

ARBITER

MEMORY

MANAGEMENT

UNIT

DIRECT

MEMORY

ACCESS

MEDIA

ACCESS

CONTROL

SERIAL

EEPROM

RD

FIFO

WR

FIFO

Address

Data

Control

RAM

25 MHz

10 Mb

Interface

100

Media

Independent

Interface

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