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LAN9215I

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

SMSC -> Microchip 

2.1

Pin List

NAME

Host Data

Host Address

Read Strobe

Write Strobe

SYMBOL

D[15:0]

A[7:1]

nRD

nWR

Chip Select

nCS

Interrupt

Request

FIFO Select

IRQ

FIFO_SEL

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

Datasheet

Table 2.1 Host Bus Interface Signals

BUFFER

#

TYPE PINS

DESCRIPTION

I/O8

16 Bi-directional data port.

IS

7 7-bit Address Port. Used to select Internal CSR’s and

TX and RX FIFOs.

IS

1 Active low strobe to indicate a read cycle.

IS

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

qualified with nCS, is also used to wakeup the

LAN9215i when it is in a reduced power state.

IS

1 Active low signal used to qualify read and write

operations. This signal qualified with nWR is also used

to wakeup the LAN9215i when it is in a reduced power

state.

O8/OD8

1 Programmable Interrupt request. Programmable

polarity, source and buffer types.

IS

1 When driven high all accesses to the LAN9215i are to

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

upper address inputs are ignored.

SPEED_SEL

0

1

SPEED

10Mbps

100Mbps

Table 2.2 Default Ethernet Settings

DEFAULT ETHERNET SETTINGS

DUPLEX

Half-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

AO

AO

AI

AI

AI

NUM

PINS

1

1

1

1

1

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.

Note: The pin names for the twisted pair pins shown above apply to a normal connection. If HP Auto-

MDIX is enabled and a reverse connection is detected, or a reverse connection is manually

selected, the input pins become outputs, and vice-versa, as indicated in the descriptions.

Revision 1.93 (12-12-07)

16

DATASHEET

SMSC LAN9215i

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