DM9801 Просмотр технического описания (PDF) - Davicom Semiconductor, Inc.

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DM9801

1M Home Phoneline Network Physical Layer Single Chip Transceiver

Davicom Semiconductor, Inc. 

DM9801

1M Home Phoneline Network Physical Layer Single Chip Transceiver

General Description

The DM9801 is a physical-layer, single-chip, low-power

transceiver for 1M Home Phoneline Network applications.

On the media side, it provides an interface to a Home

Phoneline wiring system. The reconciliation layer interfaces

to the DM9801 either through an IEEE802.3u subset Media

Independent Interface (MII) or a pseudo-standard General

Purpose Serial Interface (GPSI). A management interface is

provided by MDIO/MDC when operating in MII mode, or a

Serial Peripheral Interface bus when operating in GPSI

mode.

The DM9801 uses a low-power and high-performance

CMOS process. It contains the entire physical layer

functions of 1M as defined by Home Phoneline Network

Alliance, Rev. 1.1, including the Physical Coding

Sublayer, (RLL25) Encoder/Decoder (ENC/DEC), 4-wire

HN Driver circuit and receiver analog front end (AFE).

Patent-Pending Circuitry Includes:

An enhanced 4-wire Home Network transceiver circuit.

Block Diagram

GPSI - MII

Transmit

GPSI - MII

Receive

Muxed

GPSI

or Mii

Interface

RLL25

Encoder

Master

PHY

Controller

Transmit

Timing

Generator

HN

Secondary

Driver

HNB+/-

HN

Primary

Driver

HNA+/-

Interface

Select

RLL25

Decoder

Receiever

and

Digital PLL

Receiver

AFE

Preliminary

1

Version: DM9801-DS-P02

March 20, 2000

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