LAN9500AI datasheet(14/66 Pages) SMSC

14 / 66 page

USB 2.0 to 10/100 Ethernet Controller

Datasheet

Revision 1.1 (04-18-13)

SMSC LAN950x Family

DATASHEET

Management

Data

(External

PHY Mode)

MDIO

IS/O8

(PD)

In external PHY mode, this pin provides the

management data to/from the external PHY.

General

Purpose I/O 1

(Internal PHY

Mode Only)

GPIO1

IS/O8/

OD8

(PU)

This General Purpose I/O pin is fully

programmable as either a push-pull output, an

open-drain output, or a Schmitt-triggered input.

Note:

(LAN9500A/LAN9500Ai only)

This pin may serve as the

PME_MODE_SEL input when Internal

PHY and PME modes of operation are

in effect. Refer to Chapter 6, "PME

Operation," on page 41 for additional

information.

Management

Clock

(External

PHY Mode)

MDC

(PD)

In external PHY mode, this pin outputs the

management clock to the external PHY.

General

Purpose I/O 2

(Internal PHY

Mode Only)

GPIO2

IS/O8/

OD8

(PU)

This General Purpose I/O pin is fully

programmable as either a push-pull output, an

open-drain output, or a Schmitt-triggered input.

Transmit Data

(External

PHY Mode)

TXD3

(PU)

In external PHY mode, this pin functions as the

transmit data 3 output to the external PHY.

General

Purpose I/O 7

(Internal PHY

Mode Only)

GPIO7

IS/O8/

OD8

(PU)

This General Purpose I/O pin is fully

programmable as either a push-pull output, an

open-drain output, or a Schmitt-triggered input.

Note:

(LAN9500A/LAN9500Ai ONLY):

GPIO7 may provide additional PHY Link

Up related functionality.

EEPROM

Size

Configuration

Strap

EEP_SIZE

(PU)

The EEP_SIZE strap selects the size of the

EEPROM attached to the device.

0 = 128 byte EEPROM is attached and a total of

seven address bits are used.

1 = 256/512 byte EEPROM is attached and a

total of nine address bits are used.

Note:

A 3-wire style 1K/2K/4K EEPROM that

is organized for 128 x 8-bit or 256/512 x

8-bit operation must be used.

See Note 3.1 for more information on

configuration straps.

Table 3.1 MII Interface Pins (continued)

NUM PINS

NAME

SYMBOL

BUFFER

TYPE

DESCRIPTION

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