1893AFLF IDT, 1893AFLF Datasheet - Page 23

• Manufacturer Part Number: 1893AFLF
• Description: Ethernet ICs 3.3V 10/100 BASE TX INTEGRATED PHYCEIVER
• Manufacturer: IDT
• Type: Integrated PHY Transceiverr

Specifications of 1893AFLF

• Rohs: yes
• Product: Ethernet Transceivers
• Data Rate: 10 Mb/s, 100 Mb/s
• Supply Voltage - Max: 3.47 V
• Supply Voltage - Min: 3.14 V
• Maximum Operating Temperature: + 70 C
• Package / Case: SSOP-48
• Ethernet Connection Type: 100Base-TX, 10Base-T
• Maximum Supply Current: 160 mA
• Minimum Operating Temperature: 0 C
• Standard Supported: 802.3
• Part # Aliases: ICS1893AFLF

5.5 100Base-TX Operations
5.6 10Base-T Operations
5.7 Half-Duplex and Full-Duplex Operations
ICS1893AF, Rev. D 10/26/04
The ICS1893AF 100Base-TX mode provides 100Base-TX physical layer (PHY) services as defined in the
ISO/IEC 8802-3 standard. In the 100Base-TX mode, the ICS1893AF is a 100M translator between a MAC
and the physical transmission medium. As such, the ICS1893AF has two interfaces, both of which are fully
configurable: one to the MAC/repeater and one to the Link Segment. In 100Base-TX mode, the ICS1893AF
provides the following functions:
•
•
•
•
To accurately transmit and receive data, the ICS1893AF employs DSP-based wave shaping, adaptive
equalization, and baseline wander correction. In addition, in 100Base-TX mode, the ICS1893AF provides a
variety of control and status means to assist with Link Segment management. For more information on
100Base-TX, see
The ICS1893AF 10Base-T mode provides 10Base-T physical layer (PHY) services as defined in the
ISO/IEC 8802-3 standard. In the 10Base-T mode, the ICS1893AF is a 10M translator between a
MAC/repeater and the physical transmission medium. In 10Base-T mode, the ICS1893AF provides the
following functions:
•
•
•
The ICS1893AF supports half-duplex and full-duplex operations for both 10Base-T and 100Base-TX
applications. Full-duplex operation allows simultaneous transmission and reception of data, which
effectively doubles the Link Segment throughput to either 20 Mbps (for 10Base-T operations) or 200 Mbps
(for 100Base-TX operations).
As per the ISO/IEC standard, full-duplex operations differ slightly from half-duplex operations. These
differences are necessary, as during full-duplex operations a PHY actively uses both its transmit and
receive data paths simultaneously.
•
•
For more information on half-duplex and full-duplex operations, see the following sections:
•
•
•
•
Data conversion from both parallel-to-serial and serial-to-parallel formats
Data encoding/decoding (4B/5B, NRZ/NRZI, and MLT-3)
Data scrambling/descrambling
Data transmission/reception over a twisted-pair medium
Data conversion from both parallel-to-serial and serial-to-parallel formats
Manchester data encoding/decoding
Data transmission/reception over a twisted-pair medium
In 10Base-T full-duplex operations, the ICS1893AF disables its loopback function (that is, it does not
automatically loop back data from its transmitter to its receiver) and disables its SQE Test function.
In both 10Base-T and 100Base-TX full-duplex operations, the ICS1893AF asserts its CRS signal only in
response to receive activity while its COL signal always remains inactive.
Section 8.2, “Register 0: Control Register”
Section 8.2.8, “Duplex Mode (bit 0.8)”
Section 8.3, “Register 1: Status Register”
Section 8.6, “Register 4: Auto-Negotiation Register”
ICS1893AF Data Sheet - Release
Section 7.4, “Functional Block: 100Base-TX TP-PMD
Copyright © 2004, Integrated Circuit Systems, Inc.
All rights reserved.
23
Chapter 5 Operating Modes Overview
Operations”.
October, 2004