L80227 LSI, L80227 Datasheet - Page 21

• Manufacturer Part Number: L80227
• Manufacturer: LSI

Specifications of L80227

• Lead Free Status / RoHS Status: Not Compliant

2.2 Overview
2.2.1 Channel Operation
2.2.2 Data Paths
This section gives a brief overview of the device functional operation.
The L80227 is a complete 100/10 Mbits/s Ethernet Media Interface IC. A
block diagram is shown in
The PHY operates in the 100BASE-TX mode at 100 Mbits/s mode, or in
the 10BASE-T mode at 10 Mbits/s. The 100 Mbits/s mode and the
10 Mbits/s mode differ in data rate, signaling protocol, and allowed wiring
as follows:
The data symbol format on the twisted-pair cable for the 100 and 10
Mbits/s modes is defined in IEEE 802.3 specifications and shown in
Figure
In each device, there is a transmit data path and a receive data path
associated with each PHY channel. The transmit data path is from the
Controller Interface to the twisted-pair transmitter. The receive data path
is from the twisted-pair receiver to the Controller Interface.
Overview
100BASE-TX mode uses two pairs of category 5 or better UTP or
STP twisted-pair cable with 4B5B encoded, scrambled, and MLT3
coded 62.5 MHz ternary data to achieve a throughput of 100 Mbits/s.
10 Mbits/s mode uses two pairs of category 3 or better UTP or STP
twisted-pair cable with Manchester encoded 10 MHz binary data to
achieve a 10 Mbits/s throughput
Note:
2.2.
Unless otherwise noted, the operation and specifications
for the industrial temperature devices are identical to the
commercial temperature range device.
Copyright © 2000, 2001, 2002 by LSI Logic Corporation. All rights reserved.
Figure
2.1.
2-3