Microchip Technology MCP401XEV User Manual

MCP401XEV

Evaluation Board

User’s Guide

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MCUs and dsPIC® DSCs, KEELOQ

code hopping

MCP401XEV EVALUATION BOARD

USER ’S GUIDE

Table of Contents

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

Chapter 1. Product Overview

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

1.2 What is the MCP401XEV Evaluation Board? .................................................5

1.3 What the MCP401XEV Evaluation Board Kit Includes ................................... 6

Chapter 2. Installation and Operation

2.1 Introduction .....................................................................................................7

2.2 Features .........................................................................................................8

2.3 Getting Started ...............................................................................................9

2.4 MCP401XEV Evaluation Board Description ...................................................9

2.5 Configuring The PICkit Serial Analyzer ........................................................13

2.6 MCP40D18EV Demo Steps .........................................................................23

Appendix A. Schematic and Layouts

A.1 Introduction .................................................................................................. 27

A.2 Schematics and PCB Layout ....................................................................... 27

A.3 Board - Schematic .......................................................................................28

A.4 Board - Top Trace, Silk and Pads ............................................................... 29

A.5 Board - Bottom Trace & Pads ......................................................................30

A.6 Board - Layer 2 Ground Plane ....................................................................31

A.7 Board - Layer 3 Power Plane .......................................................................32

A.8 Board - Bottom Silk, Trace and Pads .........................................................33

Appendix B. Bill of Materials (BOM)

Worldwide Sales and Service ....................................................................................36

MCP401XEV Evaluation Board User’s Guide

NOTES:

MCP401XEV 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 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 MCP401XEV 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 MCP401XEV Evaluation Board as a development tool to emulate and debug firmware on a t arget board. The manual layout is as follows:

• Chapter 1. “Product Overview” – Important information about the MCP401XEV 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 MCP401XEV Evaluation Board.

• Appendix B. “Bill of Materials (BOM)” – Lists the parts used to build the MCP401XEV Evaluation Board.

MCP401XEV Evaluation 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® 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>

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.

“Save project before build”

4‘b0010, 2‘hF1

Chapter 1. Product Overview

1.1 INTRODUCTION

This chapter provides an overview of the MCP401XEV Evaluation Board and covers the following topics:

• What is the MCP401XEV Evaluation Board?

• What the MCP401XEV Evaluation Board kit includes

1.2 WHAT IS THE MCP401XEV EVALUATION BOARD?

The MCP401XEV Evaluation Board allows the system designer to quickly evaluate the operation of Microchip Technology’s MCP40D18 Digital Potentiometer device. This device is similar to the following devices:

•MCP40D17

•MCP40D19

• MCP4017

• MCP4018

• MCP4019

The board uses the SC70EV Generic PCB and has been p opulated for the MCP40D18. The 6-pin header (PICkit Serial) has been jumpered to the MCP40D18’s appropriate pins. This allows the PICkit Serial to communicate with the device.

Additional blank PCBs may be ordered by using the order number: SC70EV. Each SC70EV kit contains 5 PCBs.

Figure 1-1 shows the top view of the PCB.

USER ’S GUIDE

MCP401XEV Evaluation Board User’s Guide

0 Ω

MCP

FIGURE 1-1: MCP401XEV Evaluation Board Using the SC70EV Evaluation Board (MCP40D18 installed in U1).

1.3 WHAT THE MCP401XEV EVALUATION BOARD KIT INCLUDES

This MCP401XEV Evaluation Board kit includes:

• MCP401XEV Evaluation Board

• One SC70EV Blank PCB, 102-00273. Extra blank PCBs can be ordered (order #: SC70EV)

• Important Information Sheet

Chapter 2. Installation and Operation

2.1 INTRODUCTION

The MCP401XEV Evaluation Board allows the system designer to quickly evaluate the operation of the MCP40D18 10 kΩ (-103) Digital Potentiometer device using the PICkit Serial Analyzer. The PICkit Serial Analyzer is available separately (order number: DV164122).

The MCP401XEV Evaluation 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 MCP401XEV Evaluation Board can also be very easily jumpered into a customers existing circuit. This gives an indication of the MCP40D18 device performance, but is affected by the jumper lead length and the EM noise that the jumpers pick up.

The MCP401XEV Evaluation board uses the generic SC70EV Evaluation Board PCB, and includes a second blank PCB. Additional PCB may be ordered (order number: SC70EV). The SC70EV kit includes 5 blank PCBs.

Other boards can be easily built up using th e SC70EV PCB to allow evaluation of other resistance options (5 kΩ, 50 kΩ, or 100 kΩ) or any of the other devices in the following packages:

• SC70 package (uses I

- MCP4017, MCP4018, MCP4019, MCP40D17, or MCP40D19

• SOT-2 3 package (uses Up/Down interface)

- MCP4012, MCP4013, MCP4014, MCP4022, MCP4023, or MCP4024

• DIP-8 Package (uses SPI interface)

- MCP4131, MCP4141, MCP4151, or MCP4161

The MCP401XEV Evaluation 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 SC70EV Evaluation Board PCB or for modifying the MCP401XEV board is available in the SC70EV User’s Guide (DS51874). Appendix A. “Schematic and Layouts” has information on the PCB schematic and la yout while Figure 2-2 shows components that are installed on the PCB.

MCP401XEV EVALUATION BOARD

USER ’S GUIDE

C interface)

MCP401XEV Evaluation Board User’s Guide

2.2 FEATURES

The MCP401XEV Evaluation Board has the following features:

• MCP40D18-103AE/LT is installed (I

•0Ω resistors connect MCP40D18 VDD and VSS signals to the appropiate Power or Ground plane (see Figure 2-2)

•0Ω resistors connect MCP40D18 A terminal signal to Power plane, Resistor Network is in a voltage divider configuration (see Figure 2-2)

• Through-hole connection terminal (Orange) for the Wiper pin

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

• Footprints for optional passive componen ts (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 MCP4018 10 kΩ

• PICkit Serial Analyzer Header

The included SC70EV Board has the following features:

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

• Three package type footprints supported:

-SC70-6

-SC70-5

-SC70-3

-SOT-23-8

-SOT-23-6

-SOT-23-5

-SOT-23-3

- DIP-8 (300 millimeter spacing)

• Footprints for optional passive components (SMD 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 MCP4018 10 kΩ

• Can be used for SC70 or SOT-23 to DIP-8 converter

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

C address of 7Ch)

)

Installation and Operation

2.3 GETTING STARTED

The MCP401XEV Evaluation Board allows quick evaluation of the MCP40D18-103AE/LT device. This device is in the potentiometer configuration with terminal B internally tied to ground. This devices has an R 10 kΩ and has a slave I

• Using the PICkit Serial Analyzer for interface communication

• Jumpering the MCP401XEV Evaluation Board into your application circuit to control the MCP40D18-103A device

This user guide will discuss the steps needed to evaluate the MCP40D18-103AE/LT 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 MCP40D18, based on the devices I format.

2.4 MCP401XEV EVALUATION BOARD DESCRIPTION

The MCP401XEV Evaluation Board uses the flexible SC70EV Evaluation Board PCB. This simple Evaluation Board allows the system designer to quickly evaluate the operation of the MCP40D18-103A device (R

C address = 7Ch) using the PICkit Serial Ana lyzer or by jumpering the board into their application system. The PICkit Serial Analyzer is availa ble separately (ord er num b er : DV164122).

C device address of 7Ch. Evaluation can be done by:

AB(TYP)

resistance that is typically

C communication protocol

= 10 kΩ and has a device slave

2.4.1 The Hardware

Figure 2-2 shows the component layout of the MCP401XEV Evaluation Board. This is a small four-layer board (1.43" x 1.255" (36. 32 2 mm x 31.877 mm)). There are te n connection points/pads that can use either through-hole or surface-mount connector posts.

The pad labeled VDD is connected to the PCB power plane, while the pad labeled VSS is connected to the PCB ground plane. All the passive co mponents that are connected to VDD or VSS are connected to either the power plane or ground plane.

The eight 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 pu ll-up re sistor 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 VDD, the RxD component footprint 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 PICmicro In-Circuit Serial Programming (ICSP) interface.

+ 28 hidden pages

Microchip Technology MCP401XEV User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Preface

Chapter 1. Product Overview

1.1 INTRODUCTION

1.2 WHAT IS THE MCP401XEV EVALUATION BOARD?

1.3 WHAT THE MCP401XEV EVALUATION BOARD KIT INCLUDES

Chapter 2. Installation and Operation

2.1 INTRODUCTION

2.2 FEATURES

2.3 GETTING STARTED

2.4 MCP401XEV EVALUATION BOARD DESCRIPTION

2.4.1 The Hardware