User`s guide

MPLAB STARTER KIT FOR

dsPIC

DIGITAL SIGNAL CONTROLLERS

USER’S GUIDE

Chapter 1. Introduction

Thank you for purchasing Microchip Technology's MPLAB Starter Kit for dsPIC

Digital

Signal Controllers. This kit is intended to introduce and demonstrate the features of the

dsPIC33F Digital Signal Controllers (DSCs), and, in particular, some of the speech and

audio processing capabilities of dsPIC DSC devices. The starter kit demonstrates a

low-cost yet effective software technique for processing acceptable voice-quality audio.

Also, the board includes a 24-bit audio codec for high-quality audio applications. In

addition, the starter kit has on-board in-circuit debug circuitry so that you may develop

and debug your own application.

This chapter introduces the starter kit and provides an overview of its features. Topics

covered include:

•Overview

• Operational Requirements

• Board Setup

1.1 OVERVIEW

The MPLAB Starter Kit for dsPIC Digital Signal Controllers connects directly to the USB

port on a computer. The PC USB connection supplies communications and power to

the board.

The starter kit includes debug and programmer circuitry that allows applications to be

programmed onto the board’s dsPIC33F device and then debugged, all using MPLAB

IDE.

Audio input signals from an external microphone or audio equipment are routed to the

ADC module in the on-board dsPIC33F device for software processing. Alternatively,

applications can use the audio codec for converting the audio signal.

Output signals can be generated by the dsPIC33F device’s Output Compare module

as a Pulse-Width Modulated (PWM) digital waveform. This PWM signal is converted to

an analog signal by a low-pass filter on the starter kit board. Alternatively, applications

can output audio data using the audio codec. The output audio signal is then amplified

using a headphone amplifier circuit for playback on a headphone.

In addition to the Recommended Reading listed in the Preface, the following

manufacturers’ data sheets are also recommended as reference sources:

• National Semiconductor Corporation Data Sheet, LM4811 Boomer

Audio Power

Amplifier Series Dual 105mW Headphone Amplifier with Digital Volume Control

and Shutdown Mode (DS200061)

• Wolfson Microelectronics Data Sheet, WM8510 Mono CODEC with Speaker

Driver, Production Data December 2006, Rev. 4.1