LAN9116 datasheet(9/109 Pages) MICROCHIP

Part #	LAN9116

Description	Highly Efficient Single-Chip 10/100 Non-PCI Ethernet Controller

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Manufacturer	MICROCHIP [Microchip Technology]

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 2005-2016 Microchip Technology Inc.

DS00002268A-page 9

LAN9116

TABLE 2-1:

HOST BUS INTERFACE SIGNALS

Pin No.

Name

Symbol

Buffer

Type

# Pins

Description

21-26,29-

33,36-40

Host Data High

D[31:16]

I/O8 (PD)

16

Bi-directional data port.

Note that Pull-down’s are disabled in 32

bit mode.

43-46,49-

53,56-59,62-

64

Host Data Low

D[15:0]

I/O8

16

Bi-directional data port.

12-18

Host Address

A[7:1]

IS

7

7-bit Address Port. Used to select

Internal CSR’s and TX and RX FIFOs.

92

Read Strobe

nRD

IS

1

Active low strobe to indicate a read

cycle.

93

Write Strobe

nWR

IS

1

Active low strobe to indicate a write

cycle. This signal, qualified with nCS, is

also used to wakeup the LAN9116 when

it is in a reduced power state.

94

Chip Select

nCS

IS

1

Active low signal used to qualify read

and write operations. This signal

qualified with nWR is also used to

wakeup the LAN9116 when it is in a

reduced power state.

72

Interrupt

Request

IRQ

O8/OD8

1

Programmable Interrupt request.

Programmable polarity, source and

buffer types.

76

FIFO Select

FIFO_SEL

IS

1

When driven high all accesses to the

LAN9116 are to the RX or TX Data

FIFOs. In this mode, the A[7:3] upper

address inputs are ignored.

TABLE 2-2:

DEFAULT ETHERNET SETTINGS

Default Ethernet Settings

SPEED_SEL

Speed

Duplex

Auto Neg.

0

10MBPS

HALF-DUPLEX

DISABLED

1

100MBPS

HALF-DUPLEX

ENABLED

TABLE 2-3:

LAN INTERFACE SIGNALS

Pin No.

Name

Symbol

Buffer

Type

# Pins

Description

79

TXP

TPO+

AO

1

Twisted Pair Transmit Output, Positive

78

TXN

TPO-

AO

1

Twisted Pair Transmit Output, Negative

83

RXP

TPI+

AI

1

Twisted Pair Receive Input, Positive

82

RXN

TPI-

AI

1

Twisted Pair Receive Input, Negative

87

PHY External Bias

Resistor

EXRES1

AI

1

Must be connected to ground through a

12.4K ohm 1% resistor.

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