ICS1892 Datasheet, PDF (104/148 Pages) Integrated Circuit Systems – 10Base-T/100Base-TX Integrated PHYceiver

ICS1892 Data Sheet
Chapter 9 Pin Diagram, Listings, and Descriptions
9.2 ICS1892 Pin Descriptions
The tables in this section list the ICS1892 pins by their functional grouping.
9.2.1 Transformer Interface Pins
Table 9-3 lists the pins for the transformer interface group of pins.
Table 9-3. Transformer Interface Pins
Pin
Name
TP_RXN
TP_RXP
Pin
Number
11
10
Pin
Type
Input
Input
Pin Description
Twisted-Pair Receive (Data) Negative.
Within this table, see the description at pin 10, TP_RXP.
Twisted-Pair Receive (Data) Positive.
Data reception of differential analog signals occurs over the TP_RXN
and TP_RXP pair of differential-signal pins. Together these pins receive
the serial bit stream from the UTP cable through an isolation
transformer.
TP_TXN
TP_TXP
Depending on the operating mode of the remote link partner, the
received data is one of the following types of signals:
• Two-level (10Base-T, that is, Manchester encoded) signals
• Three-level (100Base-TX, that is, MLT-3 encoded) signals
These signals interface directly to an isolation transformer, which in
turn, interfaces with the UTP cable.
6
Output Twisted-Pair Transmit (Data) Negative.
Within this table, see the description at pin 5, TP_TXP.
5
Output Twisted-Pair Transmit (Data) Positive.
Differential analog signal transmission occurs over the TP_TXN and
TP_TXP pair of pins. Together these pins drive the serial bit stream
over the UTP cable.
Depending on the operating mode of the ICS1892 MDI, the
current-driven differential driver produces one of the following types of
signals:
• Two-level (10Base-T, that is, Manchester encoded) signals
• Three-level (100Base-TX, that is, MLT-3 encoded) signals
These signals interface directly to an isolation transformer, which in
turn, drives the UTP cable.
ICS1892, Rev. D, 2/26/01
© 2000-2001, Integrated Circuit Systems, Inc.
All rights reserved.
104
February 26, 2001