FLLXT1000BA.C4QE000 Intel, FLLXT1000BA.C4QE000 Datasheet - Page 20

• Manufacturer Part Number: FLLXT1000BA.C4QE000
• Manufacturer: Intel

Specifications of FLLXT1000BA.C4QE000

• Lead Free Status / RoHS Status: Not Compliant

LXT1000 — Gigabit Ethernet Transceiver
2.0
2.1
2.1.1
2.1.2
2.1.3
20
Functional Description
Introduction
The LXT1000 is an IEEE 802.3-compliant transceiver for Gigabit Ethernet over copper twisted-
pair connections. The LXT1000 supplies all of the physical layer (PHY) functions needed to
interface a Gigabit Ethernet controller to a 100-meter CAT5 twisted-pair connection. The following
paragraphs introduce the functional description sections that follow.
Network Interface
The LXT1000 uses a single, common network interface to support 1000BASE-T, 100BASE-TX,
and 10BASE-T. This physical interface consists of four signal pairs that are used for 1000 Mbps
transmission. (Only two pairs are needed for 10/100 Mbps.) Each signal pair consists of two
bidirectional balls that transmit and receive at the same time. Crossover Control allows the twisted-
pair interface to be configured for switch or DTE/NIC applications. Automatic Crossover
Detection allows the LXT1000 to automatically detect which pair is transmit and which pair is
receive and configure itself accordingly. (See
MAC Interface
The LXT1000 Media Access Controller (MAC) Interface supports several industry standards,
which facilitate system integration. This interface has two basic configurations, one of which must
be chosen as part of the basic design. See
discussion.
GMII Configuration (1000/100/10)
This configuration complies with the IEEE 802.3 standard, Clause 35, intended for “copper”
applications. It provides support for 1000BASE-T links, with fallback to 10/100 operation. For 10/
100 operation, the interface defaults to an MII interface, complying with Clause 22 of the standard.
For 10M operation, a serial option is also available.
TBI Configuration (1000 only)
This configuration complies with the IEEE 802.3 standard, Clause 36, and is intended to interface
to Gigabit MACs originally developed for fiber applications. It supports 1000M-only operation.
MDIO/MDC Interface (Management)
The LXT1000 provides the IEEE-compliant Management Data Input/Output (MDIO) Interface,
which allows upper-layer devices to monitor and control the state of the LXT1000. See
MDC Management Interface” on page
31.
“MAC Data Interface” on page 25
“Interface Descriptions” on page
for a more complete
24.)
Document #: 249276
Rev. Date: 07/20/01
Revision #: 002
Datasheet
“MDIO/