ICS1893Y-10 Datasheet, PDF (41/150 Pages) –

ICS1893Y-10 - Release
Chapter 6 Functional Blocks
6.2 Functional Block: Auto-Negotiation
The auto-negotiation logic of the ICS1893Y-10 has the following main functions:
• To determine the capabilities of the remote link partner, (that is, the device at the other end of the link
segment’s medium or cable)
• To advertise the capabilities of the ICS1893Y-10 to the remote link partner
• To establish a protocol with the remote link partner using the highest-performance operating mode that
they have in common
The design of the ICS1893Y-10 Auto-Negotiation sublayer supports both legacy 10Base-T connections as
well as new connections that have multiple technology options for the link. For example, when the
ICS1893Y-10 has the auto-negotiation process enabled and it is operating with a 10Base-T remote link
partner, the ICS1893Y-10 monitors the link and automatically selects the 10Base-T operating mode – even
though the remote link partner does not support auto-negotiation. This process, called parallel detection, is
automatic and transparent to the remote link partner and allows the ICS1893Y-10 to function seamlessly
with existing legacy network structures without any management intervention.
(For an overview of the auto-negotiation process, see Section 4.4, “Auto-Negotiation Operations”.)
ICS1893Y-10 Rev F 1/20/04
Copyright © 2004, Integrated Circuit Systems, Inc.
All rights reserved.
41
January, 2004