Application NoteNxp

Programming the DSP56300 Enhanced Filter Coprocessor (EFCOP)

Programming guide for the Enhanced Filter Coprocessor (EFCOP) in DSP563xx devices, covering FIR, IIR, and adaptive filtering for telecommunications applications.

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Overview

This application note describes the programming model and operation of the Enhanced Filter Coprocessor (EFCOP) peripheral found in the DSP56307, DSP56311, DSP56321, and DSP56L307 digital signal processors. The EFCOP is a fully programmable complex filter module designed to perform FIR, IIR, adaptive FIR, and multichannel FIR filtering concurrently with the DSP core with minimal CPU intervention. The document provides a detailed breakdown of EFCOP registers, including data input/output buffers and control status registers, and presents two complete application examples: an IIR filter and an LMS echo canceller.

Use Cases

Cellular basestation signal processing
Echo cancellation in transcoders and mobile switching centers
Vocoder implementation
Complex matched filtering for SNR maximization in transceivers

Topics

DSP56300

EFCOP

FIR filter

IIR filter

LMS echo cancellation

DSP56307

DSP56311

DSP56321

DSP56L307

adaptive filtering

complex filtering

Freescale Semiconductor

Referenced Parts

DSP56307

Freescale Semiconductor

The enhanced filter coprocessor (EFCOP) is a is a fully programmable complex filter that functions as a general-purpose peripheral module of the DSP56307, DSP56311, DSP56321, and DSP56L307 devices.

DSP56311

Freescale Semiconductor

The enhanced filter coprocessor (EFCOP) is a is a fully programmable complex filter that functions as a general-purpose peripheral module of the DSP56307, DSP56311, DSP56321, and DSP56L307 devices.

DSP56321

Freescale Semiconductor

The enhanced filter coprocessor (EFCOP) is a is a fully programmable complex filter that functions as a general-purpose peripheral module of the DSP56307, DSP56311, DSP56321, and DSP56L307 devices.

DSP56L307

Freescale Semiconductor

The enhanced filter coprocessor (EFCOP) is a is a fully programmable complex filter that functions as a general-purpose peripheral module of the DSP56307, DSP56311, DSP56321, and DSP56L307 devices.

DSP56307	Freescale Semiconductor	The enhanced filter coprocessor (EFCOP) is a is a fully programmable complex filter that functions as a general-purpose peripheral module of the DSP56307, DSP56311, DSP56321, and DSP56L307 devices.
DSP56311	Freescale Semiconductor	The enhanced filter coprocessor (EFCOP) is a is a fully programmable complex filter that functions as a general-purpose peripheral module of the DSP56307, DSP56311, DSP56321, and DSP56L307 devices.
DSP56321	Freescale Semiconductor	The enhanced filter coprocessor (EFCOP) is a is a fully programmable complex filter that functions as a general-purpose peripheral module of the DSP56307, DSP56311, DSP56321, and DSP56L307 devices.
DSP56L307	Freescale Semiconductor	The enhanced filter coprocessor (EFCOP) is a is a fully programmable complex filter that functions as a general-purpose peripheral module of the DSP56307, DSP56311, DSP56321, and DSP56L307 devices.