LAN91C111 datasheet(66/125 Pages) MICROCHIP

Part #	LAN91C111

Description	10/100 Non-PCI Ethernet Single Chip MAC PHY

PDF	125 Pages

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Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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66 / 125 page

 2011-2016 Microchip Technology Inc.

DS00002276A-page 67

LAN91C111

TA1

TA0

Turnaround

Time

These bits provide some turnaround time for MDIO

When READ = 1, TA[1:0] = Z0

When WRITE = 1, TA[1:0] = 10

The turnaround time is a 2 bit time spacing between the Register

Address field and the Data field of a management frame to avoid

contention during a read transaction. For a read transaction, both the

STA and the PHY shall remain in a high impedance state for the first

bit time of the turnaround. The PHY shall drive a zero bit during the

second bit time of the turnaround of a read transaction. During a write

transaction, the STA shall drive a one bit for the first bit time of the

turnaround and a zero bit for the second bit time of the turnaround.

R/W

D[15:0]....

Data

These 16 bits contain data to/from one of the eleven registers

selected by register address bits REGAD[4:0].

Any

Symbol

Name

Definition

R/W

LAN91C111 Datasheet(PDF) 66 Page - Microchip Technology