LAN8742AI-CZ datasheet(10/124 Pages) MICROCHIP

10 / 124 page

LAN8742A/LAN8742Ai

DS00001989A-page 10

 2013-2015 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.

LED 2

LED2

O12

This pin can be used to indicate link activity, link

speed, nINT, or nPME as configured via the LED2

Function Select field of the Wakeup Control and

Status Register (WUCSR).

Note:

Refer to Section 3.8.1, "LEDs" and Sec-

tion 3.8.4, "Wake on LAN (WoL)" for

additional LED information.

Interrupt Out-

put

nINT

O12

Active low interrupt output.

Note:

By default, the nINT signal is output on

the nINT/REFCLKO pin. The nINT sig-

nal can be optionally configured to out-

put on the LED1 or LED2 pins. Refer to

Section 3.6, "Interrupt Management" for

additional details on device interrupts.

Power Man-

agement Event

Output

nPME

O12

Active low Power Management Event (PME) out-

put.

Note:

The nPME signal can be optionally con-

figured to output on the LED1 or LED2

pins. Refer to Section 3.8.4, "Wake on

LAN (WoL)" for additional nPME and

WoL information.

nINT/

REFCLKO

Function Select

Configuration

Strap

nINTSEL

(PU)

This configuration strap selects the mode of the

nINT/REFCLKO pin.

• When nINTSEL is floated or pulled to VDD2A,

nINT is selected for operation on the

nINT/REFCLKO pin (default).

• When nINTSEL is pulled low to VSS, REF-

CLKO is selected for operation on the

nINT/REFCLKO pin.

See Note 1 for more information on configuration

straps.

Note:

Refer to See Section 3.8.1.6, "nINTSEL

and LED2 Polarity Selection" for addi-

tional information.

TABLE 2-2:

LED PINS (CONTINUED)

Num Pins

Name

Symbol

Buffer Type

Description

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