1893CFLFT IDT, 1893CFLFT Datasheet - Page 29

• Manufacturer Part Number: 1893CFLFT
• Description: Ethernet ICs 3.3V 10/100 BASE TX INTEGRATED PHYCEIVER
• Manufacturer: IDT

Specifications of 1893CFLFT

• Rohs: yes
• Part # Aliases: ICS1893CFLFT

6.2.5 Auto-Negotiation: Progress Monitor
6.3 Functional Block: 100Base-X PCS and PMA Sublayers
6.3.1 PCS Sublayer
6.3.2 PMA Sublayer
ICS1893CK-40, Rev. C, 06/02/09
Under typical circumstances, the Auto-Negotiation sublayer can establish a connection with the
ICS1893CK-40’s remote link partner. However, some situations can prevent the auto-negotiation process
from properly achieving this goal. For these situations, the ICS1893CK-40 has an Auto-Negotiation
Progress Monitor to provide detailed status information to its Station Management (STA) entity. With this
status information, the STA can diagnose the failure mechanism and – in some situations – establish the
link by correcting the problem.
When enabled, the auto-negotiation process typically requires less than 500 ms to execute, independent of
the link partner's ability to perform the auto-negotiation process. Typically, an STA polls both the
Auto-Negotiation Complete bit (bit 1.5) and the Link Status bit (bit 1.2) to determine when a link is
successfully established, either through auto-negotiation or parallel detection. The STA can then poll the
Auto-Negotiation Link Partner Ability Register and determine the highest-performance operating mode in
common with the capabilities it is advertising.
The ICS1893CK-40 is fully compliant with clause 24 of the ISO/IEC specification, which defines the
100Base-X Physical Coding sublayer (PCS) and Physical Medium Attachment (PMA) sublayers.
The ICS1893CK-40 100Base-X PCS sublayer provides two interfaces: one to a MAC and the other to the
ICS1893CK-40 PMA sublayer. An ICS1893’s PCS sublayer performs the transmit, receive, and control
functions and consists of the following:
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The ICS1893CK-40 100Base-X PMA Sublayer consists of two interfaces: one to the Physical Coding
sublayer and the other to the Physical Medium Dependent sublayer. Functionally, the PMA sublayer is
responsible for the following:
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•
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•
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PCS Transmit sublayer, which provides the following:
PCS Receive sublayer, which provides the following:
PCS control functions, which provide:
Link Monitoring
Carrier Detection
NRZI encoding/decoding
Transmit Clock Synthesis
Receive Clock Recovery
– Parallel-to-serial conversion
– 4B/5B encoding
– Collision detection
– Serial-to-parallel conversion
– 4B/5B encoding
– Carrier detection
– Code group framing
– Assertion of the CRS (carrier sense) signal
– Assertion of the COL (collision detection) signal
ICS1893CK-40 Data Sheet Rev. C - Release
Copyright © 2009, Integrated Device Technology, Inc.
All rights reserved.
29
Chapter 6 Functional Blocks
June 2009