Microchip Technology MCP43XXEV Evaluation Board User guide

MCP43XXEV

Evaluation Board

User’s Guide

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MCUs and dsPIC® DSCs, KEELOQ

code hopping

MCP43XXEV EVALUATION BOARD

USER’S GUIDE

Table of Contents

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

Chapter 1. Product Overview

1.1 Introduction .....................................................................................................9

1.2 What is the MCP43XXEV Evaluation Board? ................................................9

1.3 What the MCP43XXEV Evaluation Board Kit Includes ................................10

Chapter 2. Installation and Operation

2.1 Introduction ...................................................................................................11

2.2 Features .......... ............... .............................................................................. 12

2.3 Getting Sta rted .... .. .................................................................................. ..... 13

2.4 MCP43XXEV Evaluation Board Description ..................................... ...........13

2.5 Configuring The PICkit Serial Analyzer ........................................................19

2.6 MCP4361 Demo Steps .................................................................................28

Appendix A. Schematic and Layouts

A.1 Introduction ..................................................................................................33

A.2 Schematics and PCB Layout ................................................................. .. .. ..33

A.3 Board – Sch ematic ... .. ............. .. .. ................................................................. 34

A.4 Board – Top Trace, Silk and Pads ..............................................................35

A.5 Board – Bott o m Tr a ce a n d Pa d s .......... ........................................................ 36

A.6 Board – Layer 2 Ground Plane ...................................................................37

A.7 Board – Layer 3 Power Plane ......................................................................38

A.8 Board Layout – Top Components .............. .. .. .. ............................................39

A.9 Board – Bottom Silk, Trace and Pads ........................................................40

Appendix B. Bill of Materials (BOM)

Worldwide Sales and Service ....................................................................................42

MCP43XXEV Evaluation Board User’s Guide

NOTES:

MCP43XXEV EVALUATION 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 p age 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 MCP43XXEV Evaluation Board. Items discussed in this chapter include:

• Document Layout

• Conventions Used in this Guide

• The Microchip Web Site

• Customer Support

• Document Revision History

DOCUMENT LAYOUT

This document describes how to use the MCP43XXEV Evaluation Board as a development tool to emulate and debug firmware on a target board. The manual layout is as follows:

• Chapter 1. “Product Overview” – Important information about the MCP43XXEV Evaluation Board.

• Chapter 2. “Installation and Operation” – Includes instructions on how to get started with this evaluation board.

• Appendix A. “Schematic and Layouts” – Shows the schematic and layout diagrams for the MCP43XXEV Evaluation Board.

• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the MCP43XXEV Evaluation Board.

MCP43XXEV Evaluation Board User’s Guide

CONVENTIONS USED IN THIS GUIDE

This manual uses the following docum entat io n conven tion s:

DOCUMENTATION CONVENTIONS

Description Represents Examples

Arial font:

Italic chara c ters 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

Underlined, italic text with right angle bracket

Bold characters A dialog button Click OK

N‘Rnnnn A number in verilog format,

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

A menu path File>Save

A tab Click the Power tab

where N is the tota l number of digits, R is th e radi x and n is a digit.

IDE User’s Guide

“Save project before build”

4‘b0010, 2‘hF1

Chapter 1. Product Overview

1.1 INTRODUCTION

This chapter provides an overview of the MCP43XXEV Evaluation Board and covers the following topics:

• What is the MCP43XXEV Evaluation Board?

• What the MCP43XXEV Evaluation Board kit includes

1.2 WHAT IS THE MCP43XXEV EVALUATION BOARD?

The MCP43XXEV Evaluation Board allows the system designer to quickly evaluate the operation of Microchip Technology’s MCP4361 Digital Potentiometer device. This device is similar to the following devices:

• MCP4331

• MCP4332

• MCP4341

• MCP4342

• MCP4351

• MCP4352

• MCP4362

• MCP4231

• MCP4232

• MCP4241

• MCP4242

• MCP4251

• MCP4252

• MCP4261

• MCP4262

The board uses the TSSOP20EV Generic PCB and has been populated for the MCP4361. The 6-pin header (PICkit Serial) has been jumpered to the MCP4361’s appropriate pins. This allows the PICkit Serial to communicate with the device.

Additional blank PCBs may be ordered by using the order number: TSSOP20EV. Each TSSOP20EV kit contains 5 PCBs.

Figure 1-1 shows the top view of the populated TSSOP20EV PCB, which creates the MCP43XXEV Evaluation Board.

USER’S GUIDE

MCP43XXEV Evaluation Board User’s Guide

Through-hole Test Point (Orange) Wiper 3

MCP4361-103E/ST installed in U3 (TSSOP-20 footprint)

Through-hole Test Point (Orange) Wiper 1

Connected to Ground Plane

0 Ω

Connected to Power Plane

0 Ω

Through-hole Test Point (Orange) Wiper 2

0 Ω 0 Ω

10 kΩ

MCP4361

10 kΩ

Through-hole Test

0 Ω

Point (Orange) Wiper 0

Four Blue Wire

0 Ω

Jumpers to connect

PICkit Serial interface (SPI) to device pins

1x6 Male Header, with 90° right angle

FIGURE 1-1: MCP43XXEV Evaluation Board Using the TSSOP20EV Evaluation Board (MCP4361 installed in U3).

1.3 WHAT THE MCP43XXEV EVALUATION BOARD KIT INCLUDES

This MCP43XXEV Evaluation Board kit includes:

• MCP43XXEV Evaluation Board

• One TSSOP-20 and SSOP-20 Evaluation Board blank PCB, 102-00272. Extra blank PCBs can be ordered (order #: TSSOP20EV)

• Important Information Sheet

Chapter 2. Installation and Operation

2.1 INTRODUCTION

The MCP43XXEV Evaluation Board allows the system designer to quickly evaluate the operation of the MCP4361 10 kΩ (-103) Digital Potentiometer device using the PICkit Serial Analyzer. The PICkit Serial Analyzer is available separately (order number: DV164122).

This board is a minimum configuration for the device. As well as the device, other desired passive components (resistors and capacitors) and connection posts may be installed.

The board can also be very easily jumpered into a customer’s existing circuit. This gives an indication of the MCP4361 device performance, but is affected by the jumper lead length and the EM noise that the jumpers pick up.

The device’s resistor networks 0 and 2 have be configured in a potentiometer mode with the A terminal connected to V connected to V rheostat operation.

The MCP43XXEV Evaluation Board uses the generic TSSOP20EV Evaluation Board PCB. The kit includes a second PCB which is blank for the user to populate as desired. Additional PCBs may be ordered (order number: TSSOP20EV). The TSSOP20EV kit includes 5 blank PCBs.

Other boards can easily be built up using the TSSOP20EV PCB to allow evaluation of other resistance options (5 kΩ, 50 kΩ, or 100 kΩ) or any of the other digital potentiometer devices in the following packages:

• TSSOP-20 package

- MCP4331, MCP4341, MCP4351, or MCP4361

• TSSOP-14 package

- MCP4332, MCP4342, MCP4352, MCP4362, MCP4231, MCP4241, MCP4251, MCP4261, MCP4631, MCP4641, MCP4651, MCP4661, MCP42010, MCP42050, or MCP42100

The board also has a 6-pin interface (PICkit Serial, ICSP , etc.) whose signals can easily be jumpered to any of the device’s pins.

Additional information on using the TSSOP20EV Evaluation Board PCB or for modifying the MCP43XXEV board is available in the TSSOP20EV User’s Guide (DS51875). Appendix A. “Schematic and Layouts” has information of the PCB schematic and layout while Figure 2-2 shows components that are installed on the PCB.

MCP43XXEV EVALUATION BOARD

USER’S GUIDE

through a 0Ω resistor and the B terminal

with a 0Ω resistor. Resistor networks 1 and 3 can be evaluated for

MCP43XXEV Evaluation Board User’s Guide

2.2 FEATURES

The MCP43XXEV Evaluation Board has the following features:

• MCP4361-103E/ST is installed

•0Ω resistors connect MCP4361 V Ground plane (see Figure 2-2)

•0Ω resistors connect MCP4361’s Resistor Network 0 and 2 A terminal signal to Power plane, Resistor Network is in a voltage divider configuration (see Figure 2-2)

•0Ω resistors connect MCP4361’s Resistor Network 0 and 2 B terminal signal to Ground plane, Resistor Network is in a voltage divider configuration (see Figure 2-2)

• Through-hole connection terminal (Orange) for all Wiper pins

• Connection terminal points for all device pins (either through-hole or surface-mount)

• Footprints for optional passive components (SMT 805 footprint) for:

- Power supply filtering (C

and C2 footprints)

- Device bypass capacitor (RxD footprint for device pin connected to V

• Silk-screen area to write specifics of implemented circuit (on back of PCB), such as MCP4361 10 kΩ

• PICkit Serial Analyzer Header

The included TSSOP20EV Board has the following features:

• Connection terminals may be either through-hole or surface-mount

• Three package type footprints supported:

-TSSOP-20

-TSSOP-14

-TSSOP-8

-SSOP-20

- DIP-20 (600 mil body)

• Footprints for optional passive components (SMT 805 footprint) for:

- Power supply filtering (C

and C2 footprints)

- Device bypass capacitor (RxD footprint for device pin connected to V

- Output filtering (RxD footprint)

- Output pull-up resistor (RxU footprint)

- Output pull-down resistor (RxD footprint)

- Output loading resistor (RxD footprint)

• Silk-screen area to write specifics of implemented circuit (on back of PCB), such as MCP4361 10 kΩ

• PICkit Serial Analyzer / PICkit 2 Programming (ICSP) Header

and VSS signals to the appropriate Power or

)

Installation and Operation

2.3 GETTING STARTED

The MCP43XXEV Evaluation Board allows quick evaluation of the MCP4361-103E/ST device. The understanding of the device characteristics (such as the resistor network) is applicable to any of the devices in the MCP43XX family. The MCP4361-103 device has a typically R

• Using the PICkit Serial Analyzer for interface communication

• Jumpering the MCP43XXEV Evaluation Board into your application circuit to control the MCP4361-103 device

This User Guide will discuss the steps needed to evaluate the MCP4361-103E/ST device using the PICkit Serial Analyzer (order number: DV164122).

Section 2.5 “Configuring The PICkit Serial Analyzer” shows the steps to configure the PICkit Serial Analyzer as well as create User Script files which are used to communicate with the MCP4361, based on the devices SPI communication protocol format.

2.4 MCP43XXEV EVALUATION BOARD DESCRIPTION

The MCP43XXEV Evaluation Board uses the flexible TSSOP20EV Evaluation Board PCB. This simple Evaluation Board allows the system designer to quickly evaluate the operation of the MCP4361-103 device (R Analyzer or by jumpering the board into their application system. The PICkit Serial Analyzer is available separately (order number: DV164122).

resistance of 10 kΩ. Evaluation can be done by:

AB(TYP)

= 10 kΩ ) using the PICkit Serial

2.4.1 The Hardware

Figure 2-2 shows the component layout of the MCP43XXEV Evaluation Board. This is a small four-layer board ( 3.9" x 2.1" (99.06 mm x 53.34 mm)). There are twenty two connection points/pads that can use either through-hole or surface-mount connector posts.

The pad labeled V is connected to the PCB ground plane. All the passive components that are connected to V

or VSS are connected to either the power plane or ground plane.

The twenty remaining PCB pads correspond to the device pins (i.e.; pad 1 connects to pin 1).

Each pad has two passive components associated with them: a pull-up resistor and a pull-down resistor. The pull-up resistor is always RXU and the pull-down resistor is RXD. The “X” is a numeric value that corresponds to a particular pad (1 to 8). As an example, Pad 5’s pull-up resistor is R5U. Capacitor C1 and C2 are the power supply filtering capacitors. For whichever pin is the device’s V can be used for the device’s bypass capacitor. Table 2-2 describes the components.

A 6-pin header interface is available to support the PICkit Serial or the PIC MCU In-Circuit Serial Programming (ICSP ) interface.

is connected to the PCB power plane, while the pad labeled VSS

, the RxD component footprint

+ 29 hidden pages

Microchip Technology MCP43XXEV Evaluation Board User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Trademarks

Preface

Chapter 1. Product Overview

1.1 INTRODUCTION

1.2 WHAT IS THE MCP43XXEV EVALUATION BOARD?

1.3 WHAT THE MCP43XXEV EVALUATION BOARD KIT INCLUDES

Chapter 2. Installation and Operation

2.1 INTRODUCTION

2.2 FEATURES

2.3 GETTING STARTED

2.4 MCP43XXEV EVALUATION BOARD DESCRIPTION

2.4.1 The Hardware