ICS1893 Integrated Circuit Systems, ICS1893 Datasheet - Page 39

• Manufacturer Part Number: ICS1893
• Description: 3.3-V 10Base-T/100Base-TX Integrated PHYceiver
• Manufacturer: Integrated Circuit Systems

7.2 Functional Block: Auto-Negotiation
ICS1893 Rev C 6/6/00
The auto-negotiation logic of the ICS1893 has the following main functions:
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The design of the ICS1893 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 ICS1893 has
the auto-negotiation process enabled and it is operating with a 10Base-T remote link partner, the ICS1893
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 ICS1893 to function seamlessly with existing legacy
network structures without any management intervention.
(For an overview of the auto-negotiation process, see
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 ICS1893 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
ICS1893 - Release
Copyright © 2000, Integrated Circuit Systems, Inc.
All rights reserved.
39
Section 5.4, “ Auto-Negotiation Operations”
Chapter 7 Functional Blocks
June, 2000
.)