LAN88730AM-C datasheet(10/82 Pages) MICROCHIP

10 / 82 page

LAN88730

DS60001256B-page 10

 2012-2015 Microchip Technology Inc.

Note 1: Configuration strap values are latched on power-on reset and system reset. Configuration straps are iden-

tified by an underlined symbol name. Signals that function as configuration straps must be augmented with

an external resistor when connected to a load. Refer to Section 3.7, "Configuration Straps" for additional

information.

TABLE 2-2:

LED PINS

Num Pins

Name

Symbol

Buffer Type

Description

LED 1

LED1

O12

Link activity LED indication. This pin is driven active

when a valid link is detected and blinks when activ-

ity is detected.

Note:

Refer to Section 3.8.1, "LEDs" for addi-

tional LED information.

LED 2

LED2

O12

Link speed LED indication. This pin is driven active

when the operating speed is 100 Mbps. It is

inactive when the operating speed is 10 Mbps or

during line isolation.

Note:

Refer to Section 3.8.1, "LEDs" for addi-

tional LED information.

nINT/TXER/

TXD4 Function

Select Configu-

ration Strap

nINTSEL

(PU)

This configuration strap selects the mode of the

nINT/TXER/TXD4 pin.

• When nINTSEL is floated or pulled to VDD2A,

nINT is selected for operation on the

nINT/TXER/TXD4 pin (default).

• When nINTSEL is pulled low to VSS,

TXER/TXD4 is selected for operation on the

nINT/TXER/TXD4 pin.

See Note 1 for more information on configuration

straps.

Note:

Refer to See Section 3.8.1.2, "nINTSEL

and LED2 Polarity Selection" for addi-

tional information.

TABLE 2-3:

SERIAL MANAGEMENT INTERFACE (SMI) PINS

Num Pins

Name

Symbol

Buffer Type

Description

1SMI Data

Input/Output

MDIO

VIS/

VO8

(PU)

Serial Management Interface data input/output

SMI Clock

MDC

VIS

Serial Management Interface clock

TABLE 2-4:

ETHERNET PINS

Num Pins

Name

Symbol

Buffer Type

Description

Ethernet

TX/RX Posi-

tive Channel

TXP

AIO

Transmit/Receive Positive Channel 1

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