home networking/routers network processors CX84200 network processor with lntegrated ethernet switch CX84200 distinguishing features ? single-chip, high-performance processor with fve-port integrated ethernet switch ? can be easily integrated with various ieee 802.11b solutions ? supports homeplug (powerline) and homepna (phoneline) through an m i i interface single-chip solution with integrated five-port ethernet switch conexants 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 fve 10/100 mbps ethernet ports. in a broadband gateway application, the CX84200 network processor can provide internet access sharing capability for multiple pcs, while supporting ethernet, homepna (phoneline), homeplug (powerline), ieee 802.11 and other lan-side networking platforms. for wan access, the unit supports ethernet connectivity interoperable with any broadband modem. it is the ideal platform for a confgurable broadband gateway design that needs to accommodate many diverse wan/lan topologies. the device complies with ieee 802.3 specifcation and includes fve embedded dsp-based 10base-t/100base-tx transceivers. an auto negotiation function determines the selection of either the 10base-t or 100base-tx mode. typical applications would be a wireless home gateway including an ethernet wan port to connect to a broadband modem, four ethernet lan ports, and an 802.11b access connecting to any wi-fi compatible device. part number CX84200 description network processor with integrated ethernet switch wireless home gateway pe r sonal computer laptop computer ? ? ? laptop computer wireless clients pe r sonal computer pe r sonal computer pe r sonal computer ethernet (rj45) 802.1 1a/b/g wir eless home gatewa y using the cx8420 0 br oadband modem ethernet (rj45) broadband connection network server network s erver internet
? 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. 02-0566 home networking/routers network processors CX84200 features ? 5 ethernet ports, 1 m i i ? 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 fow 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 www.conexant.com general information: u.s. and canada: (800) 854-8099 international: (949) 483-6996 headquarters C newport beach 4311 jamboree rd, p.o. box c newport beach, ca 92660-3095 order# 102089a CX84200 home network processor block diagram interna l me mory bu s sw -a rm dm a sd ra m cont roller sr am cont roller port dm a tx /r x ma c mi i po rt 0 dm a tx /r x ma c 10 /1 00 phy tp 0 port 1 dm a tx /r x ma c 10 /1 00 ph y tp 1 po rt 2 dm a tx /r x ma c 10 /1 00 ph y tp 2 po rt 3 dm a tx /r x ma c 10/10 0 phy tp 3 sd ra m fl as h ap bu s ah bu s brid ge configu ration mi b counter s ua rt 0 i/ f ua rt 1 i/ f arm7 td mi 32-bit risc proces so r em be dded soft wa re data bu f fer/address - tabl e 16 k x 64 me mory co ntrol/ bist em be dd ed soft wa re li nk tabl e em bed ded mc ta bl e link control/ bist CX84200 home n etw or k processo r uart 0 uart 1 port 4 dm a tx /r x ma c 10 /100 ph y tp 4
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