Microchip Technology MCP3422 Evaluation Board for PICkit Serial User guide

MCP3422

Evaluation Board

for PICkit™ Serial

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.

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EELOQ, KEELOQ logo, MPLAB, PIC, PICmicro,

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

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Analog-for-the-Digital Age, Application Maestro, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, ECONOMONITOR, FanSense, In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, mTouch, PICkit, PICDEM, PICDEM.net, PICtail, PIC

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Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and T empe, 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 memo ry and analog products. In addition, Microchip’s quality system for the desig n and manufacture of development systems is ISO 9001:2000 certified.

MCUs and dsPIC® DSCs, KEELOQ

code hopping

MCP3422 EVALUATION BOARD FOR

PICkit™ SERIAL USER’S GUIDE

Table of Contents

Preface ...........................................................................................................................1

Introduction............................................................................................................1

Document Layout..................................................................................................1

Conventions Used in this Guide............................................................................2

Recommended Reading........................................................................................3

The Microchip Web Site........................................................................................ 3

Customer Support.................................................................................................3

Document Revision History...................................................................................3

Chapter 1. Quick Start Instructions

1.1 Introduction .....................................................................................................5

1.2 Description of the MCP3422 Evaluation Board ..............................................5

1.3 Getting Started with the PICkit Serial Analyzer .............................................. 6

Appendix A. Schematic and Layouts

A.1 Introduction ..................................................................................................21

A.2 Board Schematic ..........................................................................................22

A.3 Board – Top Layer ....................................................................................... 23

A.4 Board – Top Metal Layer .............................................................................24

A.5 Board – Bottom Layer .................................................................................25

Appendix B. Bill Of Materials (BOM)

Worldwide Sales and Service ....................................................................................28

MCP3422 Evaluation Board for PICkit™ Serial User’s Guide

NOTES:

MCP3422 EVALUATION BOARD FOR

PICkit™ SERIAL 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 MCP3422 Evaluation Board. Items discussed in this chapter include:

• Document Layout

• Conventions Used in this Guide

• Recommended Reading

• The Microchip Web Site

• Customer Support

• Document Revision History

DOCUMENT LAYOUT

This document describes how to use the MCP3422 Evalu a tio n Boa rd as a development tool to emulate and debug firmware on a t arget board. The manual layout is as follows:

• Chapter 1. “Quick Start Instructions” – this chapter provide s an overview of the MCP3422 Evaluation Board and instruct ions on how to use theMCP3422 Evaluation Board with PICkit

• Appendix A. “Schematic and Layouts” – shows the schematic and layout diagrams for the MCP3422 Evaluation Board.

• Appendix B. “Bill Of Materials (BOM)” – lists the parts used to build the MCP3422 Evaluation Board.

Serial Analyzer.

MCP3422 Evaluation Board for PICkit™ Serial 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® IDE User’s Guide

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

Underlined, italic text with right angle bracket

Bold characters A dialog button Click OK

N‘Rnnnn A number in verilog format,

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

Courier New font:

Plain Courier New Sample source code #define START

Italic Courier New A variable argument file.o, where file can be

Square brackets [ ] Optional arguments mcc18 [options] file

Curly brackets and pipe character: { | }

Ellipses... Replaces repeated text var_name [,

A menu path File>Save

A tab Click the Power tab

where N is the total number of digits, R is the radix and n is a digit.

Filenames autoexec.bat File paths c:\mcc18\h Keywords _asm, _endasm, static Command-line options -Opa+, -Opa- Bit values 0, 1 Constants 0xFF, ‘A’

Choice of mutually exclusive arguments; an OR selection

Represents code supplied by user

“Save project before build”

4‘b0010, 2‘hF1

any valid filename

[options] errorlevel {0|1}

var_name...] void main (void)

{ ... }

THE MICROCHIP WEB SITE

Microchip provides online support via our web site at www.microchip.com. This web site is used as a means to make files and information easily available to customers. Accessible by using your favorite Internet browser , 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 listing

• Business of Microchip – Product selector and ordering guides, latest Microchip press releases, listing of seminars and events, listings of Microchip sales offices, distributors and factory representatives

Preface

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. Lo cal 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 the web site at: http://support.microchip.com

DOCUMENT REVISION HISTORY

Revision A (November 2008)

• Initial Release of this Document.

MCP3422 Evaluation Board for PICkit™ Serial User’s Guide

NOTES:

MCP3422 EVALUATION BOARD FOR

PICkit™ SERIAL USER’S GUIDE

Chapter 1. Quick Start Instructions

1.1 INTRODUCTION

The following sections provide an overview of the MCP3422 Evaluation Board and demonstrate how to use it with the PICkit™ Serial Analyzer (P/N: DV164122).

The following topics are covered:

• Description of the MCP3422 Evaluation Board

• How to use the MCP3422 Evaluation Board with the PICkit Serial Analyzer

1.2 DESCRIPTION OF THE MCP3422 EVALUATION BOARD

The MCP3422 Evaluation Board (P/N MCP3422EV) contains a MCP3422 18-Bit Delta-Sigma Analog-to-Digital Converter (ADC). The MCP3422 is a 2-channel ADC device with various options. The MCP3422 Evaluation Board has analog inpu t connection pads and V test the conversion results using the PICkit Serial Analyzer and its PC graphic user interface (GUI). The MCP3422 Evaluation Board has the following interface:

• PICkit Serial Analyzer for writing configuration register bits and reading the conversion data.

, SDA, and SCL test pads. The user can connect inputs an d

Note: The MCP3422 Evaluation Board can be used without the PICkit Serial

Analyzer as long as the V MCP3422 Evaluation Board does not include MCU.

The user can monitor the I SDA and SCL test pads. Refer to Appendix A. “Schematic and Layouts”.

communications by connecting an oscilloscope to the

, SCL, and SDA are provided to the board. The

1.2.1 I2C Address Bits for the MCP3422

The I2C device code and address bits of the MCP3422 device are programmed at factory:

• Device Code: ‘1101’

• A2, A1, A0 Address Bits: the MCP3422 device in the MCP3422 Evaluation Boar d uses default setting: (A2, A1, A0) = (0, 0, 0)

• Address Byte = 1101000R/W

MCP3422 Evaluation Board for PICkit™ Serial User’s Guide

FIGURE 1-1: Front View of the MCP3422 Evaluation Board.

1.3 GETTING STARTED WITH THE PICKIT SERIAL ANALYZER

Figure 1-1 shows the MCP3422 Evaluation Board and Figure 1-2 shows the MCP3422 Evaluation Board and PICkit Serial Analyzer.

The following instructions describe how to use them together:

1. Connect the MCP3422 Evaluation Board’s 6-pin socket to the PICkit Serial Analyzer, as shown in Figure 1-2.

2. Connect the oscilloscope probes to the SCL and SDA test pins (optional).

3. V

4. Connecting V

5. Connecting the analog inputs: If you need to measure a single-ended input,

• Connecting the inputs: The MCP3422 Evaluation Board has input pads for

Selection: You can use the VDD from the PICkit Serial Analyzer or you can

use your own external V (a) Connect JP1, if using V (b) Disconnect JP1 and apply V

: LED D1 turns on when VDD is applied. The PICkit Serial

Analyzer will provide V

. The JP1 connector selects the VDD path.

from PICkit Serial Analyzer.

at VDD1 pin, if you are using an external VDD.

automatically, if it is connected to the PC. Make sure

LED D1 turns on, when you execute the command using the PICkit Serial Analyzer.

connect the unused pin (example, CHX-) to V

analog inputs for each input channel. You can connect all inputs at the same time and multiplex the input channel using configuration register settings. You can also leave the unused channel inputs floating.

+ 22 hidden pages

Microchip Technology MCP3422 Evaluation Board for PICkit Serial User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Preface

INTRODUCTION

DOCUMENT LAYOUT

CONVENTIONS USED IN THIS GUIDE

RECOMMENDED READING

THE MICROCHIP WEB SITE

CUSTOMER SUPPORT

DOCUMENT REVISION HISTORY

Chapter 1. Quick Start Instructions

1.1 INTRODUCTION

1.2 DESCRIPTION OF THE MCP3422 EVALUATION BOARD

1.3 GETTING STARTED WITH THE PICKIT SERIAL ANALYZER