M7020R中文資料意法半導(dǎo)體數(shù)據(jù)手冊PDF規(guī)格書

DESCRIPTION

Overview

ST Microelectronics, Inc.’s M7020R Search Engine incorporates patent-pending Associative Processing Technology? (APT) and is designed to be a high-performance, pipelined, synchronous, 32K-entry network database search engine. The M7020R database entry size can be 68 bits, 136 bits, or 272 bits. In the 68-bit entry mode, the size of the database is 32K entries. In the 136-bit mode, the size of the database is 16K entries, and in the 272-bit mode, the size of the database is 8K entries. The M7020R is configurable to support multiple databases with different entry sizes. The 34-bit entry table can be implemented using the Global Mask Registers (GMRs) building-database size of 64K entries with a single device.

FEATURES SUMMARY

■ 32K DATA ENTRIES IN 68-BIT MODE

■ TABLE MAY BE PARTITIONED INTO UP TO FOUR (4) QUADRANTS (Data entry width in each octant is configurable as 34, 68, 136, or 272 bits.)

■ UP TO 83 MILLION SUSTAINED SEARCHES PER SECOND IN 68-BIT and 136-BIT CONFIGURATIONS

■ UP TO 41.5 MILLION SEARCHES PER SECOND IN 34-BIT and 272-BIT CONFIGURATIONS

■ SEARCHES ANY SUB-FIELD IN A SINGLE CYCLE

■ OFFERS BIT-BY-BIT and GLOBAL MASKING

■ SYNCHRONOUS, PIPELINED OPERATION

■ UP TO 31 SEARCH ENGINES CASCADABLE WITHOUT PERFORMANCE DEGRADATION

■ WHEN CASCADED, THE DATABASE ENTRIES CAN SCALE FROM 248K TO 1984K DEPENDING ON THE WIDTH OF THE ENTRY

■ GLUELESS INTERFACE TO INDUSTRY STANDARD SRAMS

■ SIMPLE HARDWARE INSTRUCTION INTERFACE

■ IEEE 1149.1 TEST ACCESS PORT

■ OPERATING SUPPLY VOLTAGES INCLUDE: VDD (Operating Supply Voltage) = 1.8V VDDQ (Operating Supply Voltage for I/O) = 2.5 or 3.3V

■ 272 PBGA, 27mm x 27mm