L80223/D LSI, L80223/D Datasheet - Page 131
L80223/D
Manufacturer Part Number
L80223/D
Description
Manufacturer
LSI
Datasheet
1.L80223D.pdf
(140 pages)
Specifications of L80223/D
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the master clock input. Because OSCIN generates TX_CLK inside the
L80227, data on TXD[3:0] can be clocked into the L80227 on edges of
output clock TX_CLK or input clock OSCIN. In the case where OSCIN is
used as the input clock, a crystal is no longer needed on OSCIN, and
TX_CLK can be left open or used for some other purpose.
A.6.2 Output Drive
The digital outputs on the L80227 controller signals meet the MII driver
characteristics specified in IEEE 802.3 and shown in
Figure A.4
if
external 24.9
1% termination resistors are added. These termination
resistors are only needed if the outputs must drive an MII cable or other
transmission line type load, such as in the external PHY application
shown in
Figure
A.3. If the L80227 is used in embedded applications,
such as adapter cards and switching hubs (see
Figure A.1
and
Figure
A.2), these terminations resistors are not needed.
MII Controller Interface
A-9
Copyright © 2000, 2001, 2002 by LSI Logic Corporation. All rights reserved.
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