LAN9218I_12 Datasheet, PDF(15/134 Page) SMSC Corporation – High-Performance Single-Chip 10/100 Ethernet Controller with HP Auto-MDIX and Industrial Temperature Support

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LAN9218I_12 Datasheet, PDF (15/134 Pages) SMSC Corporation – High-Performance Single-Chip 10/100 Ethernet Controller with HP Auto-MDIX and Industrial Temperature Support

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High-Performance Single-Chip 10/100 Ethernet Controller with HP Auto-MDIX and Industrial Temperature Support

Datasheet

2.1

Pin List

NAME

Host Data High

SYMBOL

D[31:16]

Host DataLow

Host Address

D[15:0]

A[7:1]

Read Strobe

Write Strobe

nRD

nWR

Chip Select

nCS

Interrupt

Request

FIFO Select

IRQ

FIFO_SEL

Table 2.1 Host Bus Interface Signals

BUFFER

TYPE PINS

DESCRIPTION

I/O8

(PD)

16 Bi-directional data port.

Note that Pull-downâs are disabled in 32 bit mode.

I/O8

16 Bi-directional data port.

7 7-bit Address Port. Used to select Internal CSRâs and

TX and RX FIFOs.

1 Active low strobe to indicate a read cycle.

1 Active low strobe to indicate a write cycle. This signal,

qualified with nCS, is also used to wakeup the

LAN9218i when it is in a reduced power state.

1 Active low signal used to qualify read and write

operations. This signal qualified with nWR is also used

to wakeup the LAN9218i when it is in a reduced power

state.

O8/OD8

1 Programmable Interrupt request. Programmable

polarity, source and buffer types.

1 When driven high all accesses to the LAN9218i are to

the RX or TX Data FIFOs. In this mode, the A[7:3]

upper address inputs are ignored.

SPEED_SEL

SPEED

10Mbps

100Mbps

Table 2.2 Default Ethernet Settings

DEFAULT ETHERNET SETTINGS

DUPLEX

Half-Duplex

AUTO NEG.

Disabled

Enabled

NAME

TPO+

TPO-

TPI+

TPI-

PHY External Bias

Resistor

SYMBOL

TPO+

TPO-

TPI+

TPI-

EXRES1

Table 2.3 LAN Interface Signals

BUFFER

TYPE

NUM

PINS

DESCRIPTION

Transmit Positive Output (normal)

Receive Positive Input (reversed)

Transmit Negative Output (normal)

Receive Negative Input (reversed)

Receive Positive Input (normal)

Transmit Positive Input (reversed)

Receive Negative Input (normal)

Transmit Negative Output (reversed)

Must be connected to ground through a 12.4K

ohm 1% resistor.

SMSC LAN9218i

DATASHEET

Revision 2.9 (03-01-12)

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