GIGA090

2/4

Functional Description

GIGA090 IP supports three different Ethernet protocols: 10BASE-T, 100BASE-TX and

1000BASE-T, and can be configured to either Full Duplex or Half Duplex mode for each

protocol. GIGA090 IP integrates all encoding, decoding, data recovery, clock recovery,

scrambling, descrambling, digital adaptive equalization, echo cancellation, crosstalk

cancellation, ADC, DAC, line transmission, link integrity, MAC and management interface

functions that are required for 10Mb/s, 100Mb/s, and 1000Mb/s data transmission. It can be

manually configured, be programmed or automatically determine its operating mode

depending on the capabilities of the tranceiver on the opposite end of the link and the

capabilities of the cable.

The GIGA090 IP consists of 8 functional blocks:

●

Auto-Negotiation block, which is responsible for advertising the chip’s capabilities and

establishing the link.

●

Management Register block, which contains all the configuration registers

●

Management Data Interface

●

Physical Coding Sublayer block, which contains the 1000/100/10 Base T sub-blocks

●

Mac Interface.

●

DPMA: Digital Physical Media Attachment, which consists of 1000/100/10 Base T sub-

blocks:

●

Clock Distribution and Reset circuitry.

●

Status LED managment block.

Figure 1.

GIGA090 block diagram

Side-Stream

Scrambler

Trellis

Encoder

4D-PAM5

Encoder

Pulse

Shaping

DAC

Filter

and

Driver

4B/5B

Encoder

Scrambler

Parallel

to Serial

NRZ to NRZI

MLT3

Encoder

Manchester

Encoder

Link Pulse

Generator

10 TX Filter

Descrambler

and

Alignment

Viterbi &

4DPAM5

Decoders

Echo Canceller

Xtalk Canceller

Adaptive

Equalizer

Hybrid

Clk Recovery

Baseline

Wander

ADC

4B/5B

Decoder

Descrambler

NRZI to NRZ

and

Serial to Parallel

MTL3

Decoder

Manchester

Decoder

Link Pulse

Detector

10 TX Filter

Clock Recovery

SMART

Squelch

Configuration

LED interface

Clock

Generator

JTAG

Mgmt

Interface

Register

Set

Auto-Negotiation

Analog

PMD

Mac

Interface

TPAP/N

TPBP/N

TPCP/N

TPDP/N

TX-EN

TX-ER

TXD[7:0]

GTX-CLK

TX_CLK

COL

CRS

RX-DV

RX-ER

RXD[7:0]

RX-CLK

RBC0

RBC1

MAC

Interface