GENERAL DESCRIPTION

The MUSIC MUAA Routing Co-Processor (RCP) family consists of 80-bit wide content-addressable memories (CAMs), available in depths of 2K and 8K words. The CAM/RAM associated data partition is programmable from 32 bits of CAM and 48 bits of associated data, to 80 bits of CAM and 0 bits of RAM. The MUAA RCP can perform normal routing functions such as search, insert, and delete on single entries and can age multiple entries simultaneously. In addition, there is a learn instruction, particularly useful in networking applications.

DISTINCTIVE CHARACTERISTICS

? 2K and 8K x 80-bit partitionable CAM/RAM data field in address database

? 32-bit synchronous port with separate inputs and outputs; optional 16-bit configuration

? 32-bit bi-directional processor port; optional 16-bit configuration

? Pipelined operation

? Operations performed from the synchronous port or processor port; all flags independently available to both ports

? 9-bit internal time stamp

? 50 MHz clock

? 160-pin PQFP package

? 3.3 Volt core with 3.3 Volt/5 Volt tolerant IO buffers

? IEEE 1149.1 (JTAG) compliant

APPLICATION BENEFITS

? High-performance MAC Address processor for multiport switches and routers (up to 48 10/100Mb or 4 Gigabit Ethernet at wire speed)

? Layer 4 flow recognition for Quality of Service up to 16.7 million packets per second

? ARP cache manager/IP address caching at 12.5 million packets per second

? Synchronous interfaces and programmable priority between ports for simplicity of design

? Learn, age, and auto-age functions with “virtual queues” keeping track of aged and learned entries

? Transparent cascade of up to four devices without external logic, software setup, or performance hit