MC-ACT-RSENC

April 24, 2003

Reed-Solomon Encoder

Datasheet v1.1

April 24, 2003

1

Optimized for

3721 Valley Centre Drive

San Diego, CA 92130 USA

Americas:

+1 800-752-3040

Europe:

+41 (0) 32 374 32 00

Asia:

+(852) 2410 2720

E-mail: actel.info@memecdesign.com

URL:

www.memecdesign.com/actel

Product Summary

Intended Use

•

Data communication channels

•

DTV/HDTV broadcast

•

Data storage systems

•

Satellite communications

Key Features

•

Core design is customized using the following specs

o

Primitive polynomial

o

Generator polynomial

o

Number of parity symbols

o

Symbol size

o

Symbol clock rate

o

System clock rates

•

Message Block length configured by end user

•

Continuous or burst mode operation

•

Supports high speed applications (>900Mbps)

•

Simple core interface for ease of integration

•

Encoder available with or without Variable Parity Check Bytes

Targeted Devices

•

Axcelerator Family

•

ProASIC

General Description

Reed-Solomon coding is a method of forward error correction in the form of block coding. Block coding consists of

calculating a number of parity symbols over a number of message symbols. The parity symbols are appended to

the end of the message symbols forming a codeword. Reed-Solomon coding is described in the form RS(n,k),

where k is the number of message symbols in each block and n is the total number of symbols in the codeword.

The value t defines the number of symbols that can be corrected by the Reed-Solomon code, where t=(n-k)/2 and

the number of parity symbols is equal to 2t.