Microchip Technology CAP1 Series Manuale utente

2013 Microchip Technology Inc. DS50002221A-page 1

CAP1xxx Evaluation Board User’s Guide

DS50002221A-page 2 2013 Microchip Technology Inc.

1 Overview

This document provides a description of the software and hardware used to demonstrate the features

of the Microchip CAP1xxx Family of RightTouchTM multiple-channel capacitive touch controllers and

LED drivers. Two evaluation boards are covered in this User's Manual. The CAP1188 evaluation board

contains the largest, full-featured version of the CAP11xx family. The other devices in this family are

the CAP1166, CAP1128, CAP1126, CAP1133, and CAP1106. Likewise, the CAP1298 evaluation board

contains the largest, full-featured version of the CAP12xx family. The other devices in this family are

the CAP1296, CAP1293, CAP1208, CAP1206, and CAP1203.

1.1 References

Readers should be familiar with or have access to the datasheet for the device and the schematic for

the evaluation board.

The datasheet is included with the CD provided with the evaluation board, and can also be

downloaded from the Microchip website at http://www.microchip.com/mtouch.

The schematic is included with the CD provided with the evaluation board.

1.2 The RightTouch Evaluation System

The evaluation system has three major parts, as shown in Figure 1.1:

Customer-provided Windows PC

CAP1xxx graphical user interface (GUI) software (based on National InstrumentsTM LabVIEWTM

software)

CAP1xxx Evaluation Board - either the CAP1188 or CAP1298 versions (see Figure 1.2)

CAP1xxx Evaluation Board User’s Guide

2013 Microchip Technology Inc. DS50002221A-page 3

Figure 1.1 CAP1xxx Evaluation System

CAP1188 Device Capacitive

Sensors

LED

Drivers

PIC16F1454

CAP11xx

Evaluation

Board

I2C

with CAP1xxx GUI

USB

CAP1298 Device Capacitive

Sensors

LED

Drivers

PIC16F1459

CAP12xx

Evaluation

Board

I2C

with CAP1xxx GUI

USB

CAP1xxx Evaluation Board User’s Guide

DS50002221A-page 4 2013 Microchip Technology Inc.

1.2.1 Capacitive Sensing Device on the Evaluation Board

The CAP1188 device was chosen for the evaluation board because it has the most sensors and LEDs

in the CAP11xx family.

Note: The CAP1114 and CAP1214 devices, each with 14 sensors and 11 LED drivers, contain

additional features such as slider support which will be highlighted in their own evaluation

board.

The CAP1298 device was chosen for the evaluation board because it is the superset device in the

family, meaning it has the most sensors and features in the CAP12xx family including the signal guard.

The CAP1188, CAP1166, CAP1128, CAP1126, CAP1133, and CAP1106 are similar, with the exception

of the number of capacitive sensor inputs and LED drivers, as shown in Table 1 . 1 .

Figure 1.2 CAP1xxx Evaluation Board Top View

CAP1xxx Evaluation Board User’s Guide

2013 Microchip Technology Inc. DS50002221A-page 5

The CAP1298, CAP1296, CAP1293, CAP1208, CAP1206, and CAP1203 part of the same family and

so have a very similar feature set, with the major exception being of the number of capacitive sensor

inputs and the guard output, as shown in Table 1. 2 .

1.2.2 Major Components on the Evaluation Board

Figure 1.3 shows the component side of the CAP1188 evaluation board and highlights some of the

important components.

Table 1.1 CAP11xx Device Differentiation

DEVICE NUMBER OF LED DRIVERS NUMBER OF CAPACITIVE

SENSOR INPUTS

CAP1133 3 3

CAP1106 0 6

CAP1126 2 6

CAP1166 6 6

CAP1128 2 8

CAP1188 8 8

Table 1.2 CAP12xx Family Device Differentiation

DEVICE NUMBER OF CAPACITIVE

SENSORS GUARD

CAP1203 3 No

CAP1293 3 Yes

CAP1206 6 No

CAP1296 6 Yes

CAP1208 8 No

CAP1298 8 Yes

CAP1xxx Evaluation Board User’s Guide

DS50002221A-page 6 2013 Microchip Technology Inc.

Figure 1.3 Evaluation Board Component Side View

PIC16F1455

USB

5V to 3.3V

Regulator

PIC16F1455

Programming

Header

CAP1188

8-pin

Communication

Header

PIC16F1459

USB

PIC16F1459

Programming

Header

CAP1298

8-pin

Communication

Header

CAP1xxx Evaluation Board User’s Guide

2013 Microchip Technology Inc. DS50002221A-page 7

2 Software and Hardware Installation

To begin using the CAP1xxx evaluation board, you only need to supply power by plugging in the USB

connector. However, in order to further evaluate the features of the CAP device, the CAP1xxx GUI

must be installed on a Windows-based computer with a USB port.

2.1 GUI Software Installation

Begin by inserting the CD provided with the evaluation board into the computer. Run the Setup.exe

program located in the root directory of the CD. This steps through the CAP1xxx GUI installation, which

takes less than a minute. Figure 2.1 shows the initial installation screen, which displays briefly as the

setup program loads.

Figure 2.1 Software Installation Step 1

CAP1xxx Evaluation Board User’s Guide

DS50002221A-page 8 2013 Microchip Technology Inc.

Click Next in the Destination Directory window, shown in Figure 2.2. For proper operation, the files

must be installed in the default locations. The default location for the software files is C:\Program

Files\Microchip\Microchip CAP1xxx GUI and for the LabVIEWTM software is C:\Program Files\National

Instruments.

In order to use the LabVIEWTM software, the license agreement must be accepted (see Figure 2.3).

Figure 2.2 Software Installation Step 2

Figure 2.3 Software Installation Step 3

CAP1xxx Evaluation Board User’s Guide

2013 Microchip Technology Inc. DS50002221A-page 9

Follow the on-screen instructions to complete the installation. During installation, shortcuts will be

created on the Windows Start Menu and on the desktop. When installation is complete, the program

will automatically run and begin looking for the PIC16F145x USB to I2C bridge. (see Figure 2.4).

Figure 2.4 RightTouch Evaluation Software Start-up Screen

CAP1xxx Evaluation Board User’s Guide

DS50002221A-page 10 2013 Microchip Technology Inc.

2.2 USB Bridge Installation

To complete the installation, connect the USB mini connector to the EVB and the standard USB

connector to any available USB port on the PC. If the USB Bridge driver has not previously been

installed on the selected USB port, the “Find New Hardware” wizard will pop up on the PC’s screen.

Follow the on-screen instructions to complete the installation process. See Figure 2.5 through

Figure 2.8 for a step by step view of the installation.

Once installation of the USB Bridge is complete, the GUI software will begin communications with the

device on the EVB.

Figure 2.5 USB Bridge Driver Installation Step 1

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