LAN8742AI-CZ datasheet(9/124 Pages) MICROCHIP

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 2013-2015 Microchip Technology Inc.

DS00001989A-page 9

LAN8742A/LAN8742Ai

TABLE 2-2:

LED PINS

Num Pins

Name

Symbol

Buffer Type

Description

LED 1

LED1

O12

This pin can be used to indicate link activity, link

speed, nINT, or nPME as configured via the LED1

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.

Regulator Off

Configuration

Strap

REGOFF

(PD)

This configuration strap is used to disable the inter-

nal 1.2 V regulator. When the regulator is disabled,

external 1.2 V must be supplied to VDDCR.

• When REGOFF is pulled high to VDD2A with

an external resistor, the internal regulator is

disabled.

• When REGOFF is floating or pulled low, the

internal regulator is enabled (default).

See Note 1 for more information on configuration

straps.

Note:

Refer to Section 3.7.3, "REGOFF: Inter-

nal +1.2 V Regulator Configuration" for

additional details.

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