LAN8742AI-CZ datasheet(70/124 Pages) MICROCHIP

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LAN8742A/LAN8742Ai

DS00001989A-page 70

 2013-2015 Microchip Technology Inc.

4.2.12

EDPD NLP/CROSSOVER TIMEREGISTER

Index (In Decimal):

Size:

16 bits

Bits

Description

Type

Default

EDPD TX NLP Enable

When in Energy Detect Power-Down (EDPD) mode (EDPWRDOWN =1), this

bit enables the transmission of single TX NLPs at the interval defined by the

EDPD TX NLP Interval Timer Select field.

0 = TX NLP disabled

1 = TX NLP enabled when in EDPD mode

R/W

NASR

14:13

EDPD TX NLP Interval Timer Select

When in Energy Detect Power-Down (EDPD) mode (EDPWRDOWN = 1) and

EDPD TX NLP Enable is 1, this field defines the interval used to send single

TX NLPs.

00 = 1 second (default)

01 = 768 ms

10 = 512 ms

11 = 256 ms

R/W

NASR

00b

EDPD RX Single NLP Wake Enable

When in Energy Detect Power-Down (EDPD) mode (EDPWRDOWN =1), this

bit enables waking the PHY on reception of a single RX NLP.

0 = RX NLP wake disabled

1 = TX NLP wake enabled when in EDPD mode

R/W

NASR

11:10

EDPD RX NLP Max Interval Detect Select

When in Energy Detect Power-Down (EDPD) mode (EDPWRDOWN = 1) and

EDPD RX Single NLP Wake Enable is 0, this field defines the maximum inter-

val for detecting two RX NLPs to wake from EDPD mode

00 = 64 ms (default)

01 = 256 ms

10 = 512 ms

11 = 1 second

R/W

NASR

00b

9:2

RESERVED

EDPD Extend Crossover

When in Energy Detect Power-Down (EDPD) mode (EDPWRDOWN =1),

setting this bit to 1 extends the crossover time by 2976 ms.

0 = Crossover time extension disabled

1 = Crossover time extension enabled (2976 ms)

R/W

NASR

Extend Manual 10/100 Auto-MDIX Crossover Time

When Auto-MIDX is enabled and the PHY is in manual 10BASE-T or

100BASE-TX mode, setting this bit to 1 extends the crossover time by 1984

ms to allow linking to an auto-negotiation link partner PHY.

0 = Crossover time extension disabled

1 = Crossover time extension enabled (1984 ms)

R/W

NASR

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