Single-Chip Solution with Integrated Five-Port Ethernet Switch

Conexant’s broadband communications portfolio includes a comprehensive suite of semiconductor solutions that enable the digital home and information network. The Conexant CX84200 Network Processor supports complete networking system solutions for a wide variety of mainstream applications in the residential and SOHO environments. Based on a 75 MHz ARM7TDMI, this Network Processor is a single-chip solution with an integrated switch that supports five 10/100 Mbps Ethernet ports.

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