LAN8742AI-CZ datasheet(46/124 Pages) MICROCHIP

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LAN8742Ai-CZ Datasheet(PDF) 46 Page - Microchip Technology

Part #	LAN8742Ai-CZ

Description	Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX and flexPWR짰 Technology

PDF	124 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

Logo

46 / 124 page

LAN8742A/LAN8742Ai

DS00001989A-page 46

 2013-2015 Microchip Technology Inc.

FIGURE 3-16:

TDR USAGE FLOW DIAGRAM

Disable AMDIX and Force MDI (or MDIX)

Write PHY Reg 27: 0x8000 (MDI)

- OR -

Write PHY Reg 27: 0xA000 (MDIX)

TDR Channel Status Complete?

Disable ANEG and Force 100Mb Full-

Duplex

Write PHY Reg 0: 0x2100

Enable TDR

Write PHY Reg 25: 0x8000

Reg 25.8 == 0

YES

Reg 25.8 == 1

Check TDR Control/Status Register

Read PHY Reg 25: 0x8000

Save:

TDR Channel Type (Reg 25.10:9)

TDR Channel Length (Reg 25.7:0)

MDIX Case Tested?

YES

Repeat Testing

in MDIX Mode

Done

Start

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