CX11656 HomePlug 1.0 PHY Data Sheet

102069A

Conexant Proprietary and Confidential Information

iii

Contents

1. Introduction ......................................................................................................................................... 1-1

1.1

Overview .....................................................................................................................................................................1-1

1.2

Features ......................................................................................................................................................................1-3

1.3

Applications ................................................................................................................................................................1-3

2. Hardware Interface .............................................................................................................................. 2-1

2.1

CX11656 PHY Hardware Interface Signals...................................................................................................................2-1

2.2

CX11656 PHY Electrical and Environmental Specifications..........................................................................................2-9

3. CX11656 Functional Description.......................................................................................................... 3-1

3.1

MII Data Interface with MDI Control ............................................................................................................................3-2

3.1.1

MII Interface................................................................................................................................................3-3

3.1.1.1

MII Timing Diagram .................................................................................................................3-3

3.1.1.2

MII Signal Descriptions............................................................................................................3-6

3.1.1.3

MII Frame Structure.................................................................................................................3-8

3.1.2

MDI Control Interface ..................................................................................................................................3-9

3.1.2.1

MDI Signal Descriptions ........................................................................................................3-10

3.1.3

MII Management Register Set ...................................................................................................................3-10

3.1.3.1

PRE (Preamble) .....................................................................................................................3-10

3.1.3.2

ST (Start of Frame) ................................................................................................................3-10

3.1.3.3

OP (Operation Code) ..............................................................................................................3-11

3.1.3.4

PHYAD (PHY Address)...........................................................................................................3-11

3.1.3.5

REGAD (Register Address).....................................................................................................3-11

3.1.3.6

TA (Turnaround) ....................................................................................................................3-11

3.1.3.7

Data .......................................................................................................................................3-11

3.2

GPSI Interface with SPI Control.................................................................................................................................3-12

3.2.1

GSPI Interface ...........................................................................................................................................3-12

3.2.1.1

GPSI Timing Diagrams...........................................................................................................3-12

3.2.1.2

GPSI DC Characteristics.........................................................................................................3-14

3.2.1.3

GPSI Signal Descriptions .......................................................................................................3-14

3.2.2

SPI Slave Port Interface.............................................................................................................................3-15

3.2.2.1

SPI Slave Port Signal Timing .................................................................................................3-15

3.2.2.2

SPI Slave Port DC Characteristics ..........................................................................................3-16