M7020R-083ZA1 Просмотр технического описания (PDF) - STMicroelectronics

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M7020R-083ZA1

32K x 68-bit Entry NETWORK SEARCH ENGINE

STMicroelectronics 

M7020R

DESCRIPTION

Overview

ST Microelectronics, Inc.’s M7020R Search En-

gine incorporates patent-pending Associative Pro-

cessing 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.

Performance

The Search Engine can sustain 83 million transac-

tions per second when the database is pro-

grammed or configured as 68 or 136 bits. When

the database is programmed to have an entry size

Table 1. Product Range

of 34 or 272 bits, the Search Engine will perform at

41.5 million transactions per second. STM’s

M7020R can be used to accelerate network proto-

cols such as Longest-prefix Match (CIDR), ARP,

MPLS, and other Layer 2, 3, and 4 protocols.

Applications

This high-speed, high-capacity Search Engine can

be deployed in a variety of networking and com-

munications applications. The performance and

features of the M7020R make it attractive in appli-

cations such as Enterprise LAN switches and rout-

ers and broadband switching and/or routing

equipment supporting multiple data rates at OC–

48 and beyond. The Search Engine is designed to

be scalable in order to support network database

sizes to 1984K entries specifically for environ-

ments that require large network policy databases.

Figure 4, page 11 shows the block diagram for the

M7020R device.

Part Number

Operating

Supply Voltage

Operating I/O

Voltage

Speed

Temperature Range

M7020R-083ZA1

1.8V

2.5 or 3.3V

83MHz

Commercial

M7020R-066ZA1

1.8V

2.5 or 3.3V

66MHz

Commercial

M7020R-050ZA1

1.8V

2.5 or 3.3V

50MHz

Commercial

Figure 2. Switch/Router Implementation Using the M7020R

System Bus

Switch

Fabric

Network Line Interfaces

PMreomgroarmy

PrSowceitcshsor

Host

ASIC

Search

Engine

SRAM

Bank

AI04272

8/150

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