Microchip Technology Audio Development Board User guide

Audio Development Board

User’s Guide

Note the following details of the code protection feature on Microchip devices:

• Microchip products meet the specification contained in their particular Microchip Data Sheet.

• Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions.

• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property.

• Microchip is willing to work with the customer who is concerned about the integrity of their code.

• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.

Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.

Trademarks

The Microchip name and logo, the Microchip logo, dsPIC, K

EELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART,

PIC

logo, rfPIC and UNI/O are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor, MXDEV, MXLAB, SEEVAL and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A.

Analog-for-the-Digital Age, Application Maestro, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial Programming, ICSP, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, mTouch, Omniscient Code Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit, PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance, TSHARC, UniWinDriver, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

SQTP is a service mark of Microchip Technology Incorporated in the U.S.A.

All other trademarks mentioned herein are property of their respective companies.

Printed on recycled paper.

ISBN: 978-1-61341-200-8

Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company’s quality system processes and procedures are for its PIC devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified.

MCUs and dsPIC® DSCs, KEELOQ

code hopping

AUDIO DEVELOPMENT BOARD USER’S GUIDE

Table of Contents

Preface ........................................................................................................................... 5

Chapter 1. Introduction

1.1 Overview ...................................................................................................... 11

Chapter 2. Hardware

2.1 Power Supply ............................................................................................... 13

2.2 Microcontroller .............................................................................................. 13

2.3 Audio Codec, Microphone and Audio Connections ...................................... 13

2.4 Expansion Connector ................................................................................... 14

2.5 TFT Display .................................................................................................. 14

2.6 USB Connectivity ......................................................................................... 14

2.7 UART Connectivity ....................................................................................... 14

2.8 User LEDs and Switches .............................................................................. 14

Appendix A. Schematics and Board Layout

A.1 Audio Development Board Schematics ....................................................... 15

A.2 Audio Development Board Layout ............................................................... 20

Worldwide Sales and Service .................................................................................... 22

Audio Development Board User’s Guide

NOTES:

AUDIO DEVELOPMENT BOARD

USER’S GUIDE

Preface

NOTICE TO CUSTOMERS

All documentation becomes dated, and this manual is no exception. Microchip tools and documentation are constantly evolving to meet customer needs, so some actual dialogs and/or tool descriptions may differ from those in this document. Please refer to our web site (www.microchip.com) to obtain the latest documentation available.

Documents are identified with a “DS” number. This number is located on the bottom of each page, in front of the page number. The numbering convention for the DS number is “DSXXXXXA”, where “XXXXX” is the document number and “A” is the revision level of the document.

For the most up-to-date information on development tools, see the MPLAB Select the Help menu, and then Topics to open a list of available on-line help files.

IDE on-line help.

INTRODUCTION

This chapter contains general information that will be useful to know before using the Audio Development Board. Items discussed in this chapter include:

• Document Layout

• Conventions Used in this Guide

• Recommended Reading

• The Microchip Web Site

• Development Systems Customer Change Notification Service

• Customer Support

• Document Revision History

DOCUMENT LAYOUT

This document describes how to use the Audio Development Board as a development tool to design high-quality audio development platforms.

This user’s guide is composed of the following:

• Chapter 1. “Introduction” – provides an overview of the Audio Development

Board, highlighting its features and uses.

• Chapter 2. “Hardware” – provides the hardware descriptions of the Audio

Development Board.

• Appendix A. “Schematics and Board Layout” – provides a detailed schematic

and a board layout diagram of the Audio Development Board.

Audio Development Board User’s Guide

CONVENTIONS USED IN THIS GUIDE

This manual uses the following documentation conventions:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic characters Referenced books MPLAB

Emphasized text ...is the only compiler...

Initial caps A window the Output window

A dialog the Settings dialog

A menu selection select Enable Programmer

Quotes A field name in a window or dialog “Save project before build”

Underlined, italic text with right

A menu path File>Save

angle bracket

Bold characters A dialog button Click OK

A tab Click the Power tab

Text in angle brackets < > A key on the keyboard Press <Enter>, <F1>

Courier New font:

Plain Courier New

Sample source code

Filenames

File paths

Keywords

Command-line options

Bit values

Constants (in source code)

Italic Courier New A variable argument

#define START

autoexec.bat

C:\mcc18\h

_asm, _endasm, static

-Opa+, -Opa-

0, 1

0xFF, ‘A’

file.o, where valid filename

Square brackets [ ] Optional arguments

Curly brackets and pipe character: { | }

Choice of mutually exclusive arguments; an OR selection

Ellipses... Replaces repeated text

Represents code supplied by user

mcc18 [options] file [options]

errorlevel {0|1}

var_name [, var_name...]

void main (void) { ... }

IDE User’s Guide

file can be any

RECOMMENDED READING

This user’s guide describes how to use the Audio Development Board. The following Microchip documents are available and recommended as supplemental reference resources.

MPLAB® C Compiler for PIC24 MCUs and dsPIC® DSCs User’s Guide (DS51284)

This document helps you use Microchip’s 16-bit C compilers to develop your application.The compilers are the MPLAB C Compiler for dsPIC DSCs and PIC24 MCUs, the MPLAB C Compiler for dsPIC DSCs (subset of the first), and the MPLAB C Compiler for PIC24 MCUs (subset of the first). These compilers are GNU-based language tools, based on source code from the Free Software Foundation (FSF). For more information about FSF, see www.fsf.org.

MPLAB® Assembler, Linker and Utilities for PIC24 MCUs and dsPIC® DSCs User’s Guide (DS51317)

This document helps you use Microchip Technology’s 16-bit language tools based on GNU technology. The language tools discussed are the MPLAB Assembler for dsPIC DSCs and PIC24 MCUs, MPLAB Object Linker for dsPIC DSCs and PIC24 MCUs, MPLAB Archiver/Librarian for dsPIC DSCs and PIC24 MCUs and other 16-bit device utilities.

Preface

MPLAB® C Compiler for PIC32 User’s Guide (DS51686)

This document, formerly the “MPLAB C32 C Compiler for PIC32 User’s Guide”, details the use of Microchip’s MPLAB C Compiler for PIC32 to develop an application.

MPLAB® IDE User’s Guide (DS51519)

Consult this document for more information pertaining to the installation and implementation of the MPLAB IDE software, as well as the MPLAB Editor and MPLAB SIM Simulator software that are included with it.

Universal Serial Bus Specification and Associated Documents

The Universal Serial Bus is defined by the USB 2.0 specification and its associated supplements and class-specific documents. These documents are available from the USB Implementers Forum. See their website at: http://www.usb.org

ADDITIONAL INFORMATION

iPod is a registered trademark of Apple, Inc., registered in the U.S. and other countries.

Audio Development Board User’s Guide

THE MICROCHIP WEB SITE

Microchip provides online support via our web site at: http://www.microchip.com. This web site makes files and information easily available to customers. Accessible by most Internet browsers, the web site contains the following information:

• Product Support – Data sheets and errata, application notes and sample

programs, design resources, user’s guides and hardware support documents, latest software releases and archived software

• General Technical Support – Frequently Asked Questions (FAQs), technical

support requests, online discussion groups, Microchip consultant program member listings

• Business of Microchip – Product selector and ordering guides, latest Microchip

press releases, listings of seminars and events; and listings of Microchip sales offices, distributors and factory representatives

DEVELOPMENT SYSTEMS CUSTOMER CHANGE NOTIFICATION SERVICE

Microchip’s customer notification service helps keep customers current on Microchip products. Subscribers will receive e-mail notification whenever there are changes, updates, revisions or errata related to a specified product family or development tool of interest.

To register, access the Microchip web site at http://www.microchip.com, click Customer Change Notification and follow the registration instructions.

The Development Systems product group categories are:

• Compilers – The latest information on Microchip C compilers and other language

tools. These include the MPLAB assemblers; MPLINK™ and MPLAB 16-bit object linkers; and MPLIB™ and MPLAB 16-bit object librarians.

• Emulators – The latest information on the Microchip MPLAB

In-Circuit Emulator.

• In-Circuit Debuggers – The latest information on the Microchip in-circuit

debugger, MPLAB ICD 3.

• MPLAB IDE – The latest information on Microchip MPLAB IDE, the Windows

Integrated Development Environment for development systems tools. This list is focused on the MPLAB IDE, MPLAB SIM simulator, MPLAB IDE Project Manager and general editing and debugging features.

• Programmers – The latest information on Microchip programmers. These include

the MPLAB PM3 device programmer and the PICkit™ 3 development programmers.

C compiler; MPASM™ and MPLAB 16-bit

REAL ICE™

CUSTOMER SUPPORT

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

• Local Sales Office

• Field Application Engineer (FAE)

• Technical Support

Customers should contact their distributor, representative or field application engineer (FAE) for support. Local sales offices are also available to help customers. A listing of sales offices and locations is included in the back of this document.

Technical support is available through our web site at: http://microchip.com/support

DOCUMENT REVISION HISTORY

Revision A (May 2011)

This is the initial release of the Audio Development Board User’s Guide.

Preface

Audio Development Board User’s Guide

NOTES:

Thank you for purchasing an Audio Development Board from Microchip Technology

Inc. The Audio Development Board showcases a 16/32-bit audio development platform with a true 24-bit audio codec. In addition, the board also showcases the performance of PIC32 MCU/dsPIC33E DSC for complex audio algorithms.

1.1 OVERVIEW

The features of the Audio Development Board are:

• High-performance MCU

• Wolfson WM8960 audio codec with up to 48 kHz sampling rate and up to 24-bit

• Headphone out, Line-in jacks, and an on-board MIC

• TFT color display with 220x176 resolution

• PICtail™ Plus Connector

• General purpose user switches and LEDs

Figure 1-1 shows the Audio Development Board, which is annotated to show the main

components. Each component is described in detail in Ta bl e 1 -1 .

AUDIO DEVELOPMENT BOARD

USER’S GUIDE

Chapter 1. Introduction

resolution

FIGURE 1-1: AUDIO DEVELOPMENT BOARD

Audio Development Board User’s Guide

TABLE 1-1: AUDIO DEVELOPMENT BOARD COMPONENT DESCRIPTIONS

Item

Number

1 J1 9V DC power connector.

2 U2 Microcontroller.

3 U1 Wolfson WM8960 audio codec.

4 J2 PICtail Plus Connector for iPod

5 LCD1 2-inch (220x176) TFT display.

6 J7 USB interface connector.

7 J10 RS-232 serial UART connector.

8 S1, S2, S3, S4 General purpose user application switches.

9 MIC1 Condenser microphone.

10 HP OUT 3.5 mm stereo headphone socket.

11 Line IN Line input socket.

12 J3 RJ-45 debugger connector.

13 RESET1 Device Reset switch.

14 D3, D4, D5 General purpose user LEDs.

Refer to Chapter 2. “Hardware” for detailed hardware descriptions

Component

Label

Description

PICtail™ Plus Board.

This chapter provides a functional overview of the hardware used in the Audio Development Board and identifies the major hardware components.

Topics covered include:

• Power Supply

• Microcontroller

• Audio Codec, Microphone and Audio Connections

• PICtail™ Plus Connector

• TFT Display

• USB Connectivity

• UART Connectivity

• User LEDs and Switches

2.1 POWER SUPPLY

Power can be supplied to the Audio Development Board through the DC connector (J1). By connecting a 9V power supply to the DC connector, the Audio Development Board and the expansion connector will receive the proper voltages.

AUDIO DEVELOPMENT BOARD

USER’S GUIDE

Chapter 2. Hardware

Care should be exercised while working with headphones or speakers. Exposure to high volumes can result in hearing damage. The use of headphones or speakers with built-in volume control is recommended.

2.2 MICROCONTROLLER

The microcontroller (U2) on-board the Audio Development Board is a 16/32-bit, high-performance microcontroller (MCU). The clock requirement is met via the 8 MHz external crystal oscillator (Y2). The device can be placed in Reset by activating the RESET1 switch.

A debugger or programmer such as MPLAB 3 can be used via the RJ-45 (J3) connector. The debugging interface is implemented via the ICSP™ protocol and the external debugger is connected to the ICSP socket (J3).

CAUTION

REAL ICE™ In-Circuit Emulator or ICD

Audio Development Board User’s Guide

2.3 AUDIO CODEC, MICROPHONE AND AUDIO CONNECTIONS

The audio codec (U1) is a Wolfson WM8960. The codec is of hi-fi quality with up to 24-bit resolution. The sampling rates supported are between 8 kHz to 48 kHz and includes an on-chip flexible PLL. The codec has a built-in headphone driver and a stereo Class D speaker driver. In addition, it has low-power consumption and offers a small foot print. On 32-bit microcontroller, the codec data interface is handled through the SPI module in Framed SPI mode. On 16-bit microcontroller, the codec data interface is handled through the DCI module. The control registers of the codec are configured over the I oscillator.

The condenser microphone (MIC1) is available on the board for capturing audio. The microphone bias voltage is provided directly by the codec and is connected via Line Input 1 of the codec. The microphone bias voltage level and sensitivity are controlled via the codec registers. The microphone signal is presented as a mono signal to the application.

The line-in jack (Line IN) is available to interface to audio signal sources (such as CD players and musical instruments) that use line level ouputs.The line input signal is a stereo signal and is connected to Left Input 2 and Right Input 2 of the codec.

Note: The maximum line input signal level should not exceed 0.5Vrms on

C interface. The codec external clock is provided by a 12 MHz crystal

differential and 1Vrms on single-ended input.

The Headphone jack (HP OUT) is a 3.5 mm stereo socket that connects to the codec headphone amplifier, with the headphone signal output as a true stereo signal. Any commercially available headphone can be connected to the headphone jack. The headphone volume and the headphone input signal are configurable via the codec registers. The codec outputs a maximum of 20 mW into a 32 Ohm headphone.

2.4 PICtail™ PLUS CONNECTOR

The expansion connector (J2) on the Audio Development Board can be used to enable Made for iPod (MFi) features for an iPod connector is not compatible with any other PICtail Plus Daughter boards.

2.5 TFT DISPLAY

The Audio Development Board has a 2 inch TFT display (LCD1) with a resolution of 220x176 for a maximum of 262K colors. The display is controlled by a chip-on-glass OTM2201A display controller. The display controller requires 8-bit parallel interface. The Parallel Master Port (PMP) on the MCU is used to interface to the display controller.

2.6 USB CONNECTIVITY

The Audio Development Board features USB Host support (J7). This connector allows applications to interface to USB devices such as a USB Thumb Drive, USB mouse, and so on. The USB module on the MCU provides the required USB Host functionality. A 5V switch controlled by the MCU controls the power supply to the attached USB device.

PICtail Plus board. The PICtail Plus

2.7 UART CONNECTIVITY

The RS-232 Serial port (J10) provides a general purpose serial communication port for application use. The MAX3232CUE (U4) RS-232 transceiver provides the required translation level and connects to a UART on the MCU (U2).

2.8 USER LEDS AND SWITCHES

The general purpose LEDs, D3, D4, and D5, are available for application use. The LEDs are connected to the MCU (U2) output ports. Setting the port high will activate the LED.

The general purpose push button switches S1, S2, S3, and S4, are available for application use. All four switches are connected to the MCU input ports. Activating a switch will cause the port line to pull low.

Note: Switches S2 and S3 are marked on the board as controlling volume;

however, these switches do not control the volume of the codec (U1) DAC directly. The codec DAC volume is controlled by the on-board device (U2).

Hardware

Audio Development Board User’s Guide

NOTES:

AUDIO DEVELOPMENT BOARD

+3.3V_DIG

R19 6.8ohms

R18

6.8ohms

R17

R20 6.8ohms

Appendix A. Schematics and Board Layout

A.1 AUDIO DEVELOPMENT BOARD SCHEMATICS

FIGURE A-1: DISPLAY CIRCUIT

USER’S GUIDE

C27

10uF

C23

10uF

C17

4.7uF

+3.3V_DIG

5.6K

C13

1uF

C20

4.7uF

+3.3V_ANA

4.7K

C15

0.1uF

5.6K

C11

1uF

100uF

C21

220pF

C12

5.6K R5

0.1uF

C19

+3.3V_ANA

100uF

C22

+3.3V_DIG

4.7K

5.6K

C14

220pF

C18

4.7uF

+3.3V_ANA

C16

0.1uF

+3.3V_DIG

2.2K

WM8960_QFN32

FIGURE A-2: AUDIO CIRCUIT

Audio Development Board User’s Guide

+3.3V_DIG

1uF

C42

C39

1uF

+3.3V_DIG

1uF

C37

C41

1uF

+3.3V_DIG

0 ohmsR21

+3.3V_DIG

1uF

C43

C28

0.1uF

+3.3V_DIG

C30

100uF

+3.3V_DIG

0 ohmsR22

8Mhz

R24 0 ohms

+3.3V_DIG

C45

18pF

C44

18pF

R23 0 ohms

USB-Type A

+3.3V_DIG

FIGURE A-3: MICROCONTROLLER AND USB CIRCUITS

Schematics and Board Layout

1UF

1uF

10uF

+3.3V_DIG +3.3V_DIG +3.3V_DIG +3.3V_DIG

0.1uF

C24

0.1uF

C25

10uF

C29

0.1uF

C35

C46

0.1uF

C47

0.1uF

C48

0.1uF

+9V

+3.3V_DIG

+3.3V_ANA

0.1uF

R25

+3.3V_DIG

470R

+3.3V_DIG

+3.3V_DIG + 3.3V_DIG

0.1uF

10uF

1uF

0.1uF

C26

C36

0.1uF

C38

0.1uF

10uF

Power

+3.3V_DIG

LM1117MPX-3.3

VR2

LM1117MP-5.0

VR1

FIGURE A-4: POWER CIRCUITS

Audio Development Board User’s Guide

Schematics and Board Layout

DNP

RESET1

+3.3V_DIG

0.1uF

C10

R11

470R

R12

470R

Expansion Connector

+3.3V_DIG

0.1uF

C32

0.1uF

C40

10K

R14

+3.3V_DIG

10K

R27

0.1uF

C31

0.1uF

C33

+3.3V_DIG

0.1uF

C34

+3.3V_DIG

10K

R13

10K

R15

R10

470R

R16

10K

PGD

MCLR

VDD

VSS

PGC

N.C.

RJ11_6PIN

ICSP

LEDs

General Purpose Switches

FIGURE A-5: COMMUNICATION CIRCUITS

(EXPANSION CONNECTOR, ICSP, SWITCHES, AND LEDs)

A.2 AUDIO DEVELOPMENT BOARD LAYOUT

FIGURE A-6: BOARD LAYOUT (TOP)

Audio Development Board User’s Guide

NOTES:

Worldwide Sales and Service

AMERICAS

Corporate Office

2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support:

http://www.microchip.com/ support

Web Address:

www.microchip.com

Atlanta

Duluth, GA Tel: 678-957-9614 Fax: 678-957-1455

Boston

Westborough, MA Tel: 774-760-0087 Fax: 774-760-0088

Chicago

Itasca, IL Tel: 630-285-0071 Fax: 630-285-0075

Cleveland

Independence, OH Tel: 216-447-0464 Fax: 216-447-0643

Dallas

Addison, TX Tel: 972-818-7423 Fax: 972-818-2924

Detroit

Farmington Hills, MI Tel: 248-538-2250 Fax: 248-538-2260

Indianapolis

Noblesville, IN Tel: 317-773-8323 Fax: 317-773-5453

Los Angeles

Mission Viejo, CA Tel: 949-462-9523 Fax: 949-462-9608

Santa Clara

Santa Clara, CA Tel: 408-961-6444 Fax: 408-961-6445

Toronto

Mississauga, Ontario, Canada Tel: 905-673-0699 Fax: 905-673-6509

ASIA/PACIFIC

Asia Pacific Office

Suites 3707-14, 37th Floor Tower 6, The Gateway Harbour City, Kowloon Hong Kong Tel: 852-2401-1200 Fax: 852-2401-3431

Australia - Sydney

Tel: 61-2-9868-6733 Fax: 61-2-9868-6755

China - Beijing

Tel: 86-10-8569-7000 Fax: 86-10-8528-2104

China - Chengdu

Tel: 86-28-8665-5511 Fax: 86-28-8665-7889

China - Chongqing

Tel: 86-23-8980-9588 Fax: 86-23-8980-9500

China - Hangzhou

Tel: 86-571-2819-3180 Fax: 86-571-2819-3189

China - Hong Kong SAR

Tel: 852-2401-1200 Fax: 852-2401-3431

China - Nanjing

Tel: 86-25-8473-2460 Fax: 86-25-8473-2470

China - Qingdao

Tel: 86-532-8502-7355 Fax: 86-532-8502-7205

China - Shanghai

Tel: 86-21-5407-5533 Fax: 86-21-5407-5066

China - Shenyang

Tel: 86-24-2334-2829 Fax: 86-24-2334-2393

China - Shenzhen

Tel: 86-755-8203-2660 Fax: 86-755-8203-1760

China - Wuhan

Tel: 86-27-5980-5300 Fax: 86-27-5980-5118

China - Xian

Tel: 86-29-8833-7252 Fax: 86-29-8833-7256

China - Xiamen

Tel: 86-592-2388138 Fax: 86-592-2388130

China - Zhuhai

Tel: 86-756-3210040 Fax: 86-756-3210049

ASIA/PACIFIC

India - Bangalore

Tel: 91-80-3090-4444 Fax: 91-80-3090-4123

India - New Delhi

Tel: 91-11-4160-8631 Fax: 91-11-4160-8632

India - Pune

Tel: 91-20-2566-1512 Fax: 91-20-2566-1513

Japan - Yokohama

Tel: 81-45-471- 6166 Fax: 81-45-471-6122

Korea - Daegu

Tel: 82-53-744-4301 Fax: 82-53-744-4302

Korea - Seoul

Tel: 82-2-554-7200 Fax: 82-2-558-5932 or 82-2-558-5934

Malaysia - Kuala Lumpur

Tel: 60-3-6201-9857 Fax: 60-3-6201-9859

Malaysia - Penang

Tel: 60-4-227-8870 Fax: 60-4-227-4068

Philippines - Manila

Tel: 63-2-634-9065 Fax: 63-2-634-9069

Singapore

Tel: 65-6334-8870 Fax: 65-6334-8850

Taiwan - Hsin Chu

Tel: 886-3-6578-300 Fax: 886-3-6578-370

Taiwan - Kaohsiung

Tel: 886-7-213-7830 Fax: 886-7-330-9305

Taiwan - Taipei

Tel: 886-2-2500-6610 Fax: 886-2-2508-0102

Thailand - Bangkok

Tel: 66-2-694-1351 Fax: 66-2-694-1350

EUROPE

Austria - Wels

Tel: 43-7242-2244-39 Fax: 43-7242-2244-393

Denmark - Copenhagen

Tel: 45-4450-2828 Fax: 45-4485-2829

France - Paris

Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79

Germany - Munich

Tel: 49-89-627-144-0 Fax: 49-89-627-144-44

Italy - Milan

Tel: 39-0331-742611 Fax: 39-0331-466781

Netherlands - Drunen

Tel: 31-416-690399 Fax: 31-416-690340

Spain - Madrid

Tel: 34-91-708-08-90 Fax: 34-91-708-08-91

UK - Wokingham

Tel: 44-118-921-5869 Fax: 44-118-921-5820

05/02/11

Microchip Technology Audio Development Board User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

1.1 OVERVIEW

Chapter 1. Introduction

FIGURE 1-1: AUDIO DEVELOPMENT BOARD

TABLE 1-1: AUDIO DEVELOPMENT BOARD COMPONENT DESCRIPTIONS

2.1 POWER SUPPLY

Chapter 2. Hardware

2.2 MICROCONTROLLER

2.3 AUDIO CODEC, MICROPHONE AND AUDIO CONNECTIONS

2.4 PICtail™ PLUS CONNECTOR

2.5 TFT DISPLAY

2.6 USB CONNECTIVITY

2.7 UART CONNECTIVITY

2.8 USER LEDS AND SWITCHES

Appendix A. Schematics and Board Layout

A.1 AUDIO DEVELOPMENT BOARD SCHEMATICS

FIGURE A-1: DISPLAY CIRCUIT

FIGURE A-2: AUDIO CIRCUIT

FIGURE A-3: MICROCONTROLLER AND USB CIRCUITS

FIGURE A-4: POWER CIRCUITS

A.2 AUDIO DEVELOPMENT BOARD LAYOUT

FIGURE A-6: BOARD LAYOUT (TOP)