PIC32 datasheet(19/33 Pages) MICROCHIP

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PIC32 USB Starter Kit III User’s Guide

DS70005132B-page 18

 2013 Microchip Technology Inc.

• DEVICE mode – Connect the debug Mini-B USB cable to port J3 and this cable

will be plugged into the Host USB port to provide power and for debugging, if nec-

essary. Then connect the starter kit to the Host using a cable with a Type-B Micro

connector to the starter kit’s Micro A/B port J4, located on the bottom side of the

starter kit. Connect the other end of this cable to the Host for the DEVICE mode

communication. Jumper JP1 should be removed.

• OTG mode – Connect the starter kit to the OTG device using an OTG Micro A/B

cable to the Micro A/B port J4, located on the bottom side of the starter kit. The

starter kit provides an on-board power supply capable of providing 120 mA (maxi-

mum). This supply is controlled by the PIC32MX470F512L microcontroller.

Jumper JP1 should be removed.

2.1.5

Switches

Three push button switches provide the following functionality:

• SW1: Active-low switch connected to RD6

• SW2: Active-low switch connected to RD7

• SW3: Active-low switch connected to RD13

These switches do not have any debounce circuitry and require the use of internal

pull-up resistors, which allows the investigation of software debounce techniques.

When idle, the switches are pulled high (+3.3V), and when pressed, they are grounded.

2.1.6

LEDs

The three LEDs, LED1, LED2, and LED3, are connected to RD0, RD1, and RD2 of

PORTD of the processor. The PORTD pins are set high to illuminate the LEDs.

2.1.7

Oscillator Options

The installed microcontroller has an oscillator circuit connected to it. The main oscillator

uses an 8 MHz crystal (Y1) and functions as the controller’s Primary Oscillator. Use of

an external crystal is required to develop USB applications. The USB specification

dictates a frequency tolerance of +/- 0.25% for full speed. Non-USB applications can

use the internal oscillators. The starter kit also has provisions for an external Secondary

Oscillator (Y2); however, this is not populated.

The PIC24FJ256GB106 is independently clocked and has its own 12 MHz crystal (Y3).

2.1.8

120-Pin Modular Expansion Connector

The PIC32 USB Starter Kit III is designed with a 120-pin modular expansion interface,

which allows the board to provide basic generic functionality now, and easy

extendability to new technologies as they become available.

TABLE 2-1:

STARTER KIT CONNECTOR PART NUMBERS

Connector

HIROSE Electric PN

Starter Kit Connector

FX10A-120P/12-SV1(71)

Application Board Connector

FX10A-120S/12-SV(71)

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