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CX84200

Network Processor with lntegrated Ethernet Switch

Conexant Systems 

Home Networking/Routers

Network Processors

Port 4

DMA

Tx/Rx

MAC

10/100

PHY

CX84200 Home Network Processor

Embedded Software

Data Buffer/Address-

Table

16K x 64

Embedded

Software

Link Table

Embedded MC

Table

Memory Control/ BIST

Link Control/ BIST

Internal Memory Bus

ARM7TDMI

32-Bit RISC Processor

Port 3

DMA

Port 2

DMA

Port 1

DMA

Tx/Rx

MAC

10/100

PHY

Tx/Rx

MAC

10/100

PHY

Tx/Rx

MAC

10/100

PHY

Port 0

DMA

Tx/Rx

MAC

10/100

PHY

Port

DMA

Tx/Rx

MAC

SW-ARM

DMA

SDRAM

Controller

SRAM

Controller

AH Bus

Bridge

AP Bus

Configuration

MIB

Counters

UART0

I/F

UART1

I/F

CX84200 Home Network Processor block diagram

CX84200 Features

• 5 Ethernet ports, 1 MII

• Embedded RISC CPU, 75MHZ ARM7TDMI

• Embedded switch engine

 - Store-and-forward operation

 - Non-blocking, full line speed capability

 - Full-duplex (IEEE802.3x) and half-duplex flow control

(Back pressure)

 - Two priorities CoS, set by port, VLAN tag, TCPIP TOS,

and customized type

 - 6 port grouping VLAN (overlappable)

 - MIB counters

 - Sharing dynamic data buffer management,

embedded SSRAM

 - MAC look-up table read/write-able

 - MAC address level security

 - Bandwidth control

 - Hashing scheme: direct-map or XOR

• Embedded 10/100BaseT/TX PHY

 - DSP based design

 - 10BASE-T/100BASE-TX IEEE 802.3u Compliant

 - Digital Decision Feedback Equalizer

 - Integrated Baseline Wander Correction

 - 3 LEDs provided per port

• Flash interface (512Kx8, 512Kx16 up to 1Mx16)

• SDRAM interface (1Mx16x2 up to 4Mx16x2)

• 2 UART interface, one for the modem interface

• GPIO pins

• LAN / WAN bandwidth prioritized

• Single 25MHz crystal input for network

• 2.5/3.3V, 0.25u CMOS process, 208-pin PQFP

© 2002, Conexant Systems, Inc. All Rights Reserved. Conexant and the

Conexant logo are trademarks of Conexant Systems, Inc. All other trademarks

are owned by their respective owners. Although Conexant strives for accuracy

in all its publications, this material may contain errors or omissions and is

subject to change without notice. THIS MATERIAL IS PROVIDED AS IS AND WITHOUT

ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING MERCHANTABILITY, FITNESS FOR A

PARTICULAR PURPOSE AND NON-INFRINGEMENT. Conexant shall not be liable for any

special, indirect, incidental or consequential damages as a result of its use.

www.conexant.com

General Information:

U.S. and Canada: (800) 854-8099

International: (949) 483-6996

Headquarters – Newport Beach

4311 Jamboree Rd, P.O. Box C

Newport Beach, CA 92660-3095

Order# 102089A

02-0566

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