Datasheet > DM9101

DM9101

更新时间： 2024-11-19 06:54:11

品牌	Logo	应用领域
其他 - ETC		以太网局域网（LAN）标准
页数	文件大小	规格书
43页	264K
描述
10/100Mbps Ethernet Physical Layer Single Chip Transceiver

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DM9101 数据手册

DM9101

10/100Mbps Ethernet Physical Layer Single Chip Transceiver

General Description

Sublayer (PCS), Physical Medium Attachment (PMA),

The DM9101 is a physical-layer, single-chip, low-power

transceiver for 100Base-TX, and 10Base-T operations. On

the media side, it provides a direct interface either to

Unshielded Twisted Pair Category 5 Cable (UTP5) for

100Base-TX Fast Ethernet, or UTP5/UTP3 Cable for

10Base-T Ethernet. Through the IEEE 802.3u Media

Independent Interface (MII), the DM9101 connects to the

Medium Access Control (MAC) layer, ensuring a high inter-

operability among products from different vendors.

100Base-TX Twisted Pair Physical Medium Dependent

Sublayer (TP-PMD), and a 10Base-T Encoder/Decoder

(ENC/DEC). The DM9101 provides strong support for the

Auto-negotiation function utilizing automatic media speed

and protocol selection. The DM9101 incorporates an

internal wave-shaping filter to control rise/fall time,

eliminatingtheneed for external filteringon the 10/100Mbps

signals.

Patent-Pending Circuitry Includes:

Smart adaptive receiver equalizer

Digital algorithm for high frequency clock/data recovery

circuit

The DM9101 uses a low-power and high-performance

CMOS process. It contains the entire physical layer

functions of 100Base-TX as defined by IEEE 802.3u,

including the Physical Coding

High speed wave-shaping circuit

Block Diagram

25M OSCI

LED1-4#

LED

Driver

TX CGM

NRZ

NRZI

4B/5B

Encoder

Parallel

to Serial

NRZI to

MLT-3

Driver

Scrambler

100TXD+/-

Rise/Fall

Time

CTL

25M CLK

125M CLK

MII

Interface/

Control

MII

Signals

Code-

group

Alignment

NRZI

NRZ

4B/5B

Decoder

Serial to

Parallel

MLT-3 to

NRZI

Adaptive

Descrambler

RXI+/-

CRM

Digital

Logic

RXI+/-

10BASE-T

Module

10TXD+/-

Collision

Detection

Carrier

Sense

Auto-

Negotiation

Final

Version: DM9101-DS-F03

July 22, 1999

12 3 4 5 6 7...43

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