DP83256 datasheet(31/146 Pages) TI1

Part #	DP83256

Description	PLAYER(TM) Device (FDDI Physical Layer Controller)

PDF	146 Pages

Scroll/Zoom	100%

Manufacturer	TI1 [Texas Instruments]

Direct Link	http://www.ti.com

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31 / 146 page

30 Functional Description (Continued)

INTERFACE ACTIVATION

The Primary PMD Interface is always enabled

The Alternate PMD Interface is enabled by programming a

PLAYERa register bit To enable the interface writea1to

the APMDEN bit in the APMDREG register The interface is

off by default and should be left that way unless it is being

used

It will also probably be necessary to enable the Transmit

Clocks when using the Alternate PMD Interface The Trans-

mit Clocks (TXC) are enabled by writing a 1 to the TXCE bit

in the CGMREG register The transmit clocks are disabled

by default and should be left that way unless it is being

used

Note that when the Alternate PMD Interface is active the

Primary PMD Interface can not be used without the Alter-

nate PMD Interface connections Also note that the Long

Internal Loopback (LILB) can not be used when the Alter-

nate PMD Interface is activated

DP83256 Datasheet(PDF) 31 Page - Texas Instruments