Explorer 8 Development Board Layout and Schematic Quick Start Guide

Explorer 8 Development Board Layout and
Schematic Quick Start Guide
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The Explorer 8 Development Board Layout and Schematic can be found on the
Microchip web site:
The Explorer 8 board is one of the latest demonstration boards for evaluating and
demonstrating the capabilities and features of Microchip’s 8-bit MCUs. It includes two
fixed and one variable power supply, a 16x2 Character LCD module, a pair of
mikroBUS™ Click™ board headers to accommodate a variety of plug-in modules, a pair
of Digilent Pmod™ connectors, an in-line completely configurable connector, PICtail™
connectors and a USB-to-serial/I2C™ converter. The Explorer 8 is fully compatible with
the MPLAB® Code Configurator and MPLAB® X v3.00 or later.
Board Power-Up
On-board power consists of two fixed voltages and one variable voltage. The two fixed
voltages are of 5.0V and 3.3V, and the variable supply can produce 1.2V to 5V. All three
power supplies can be run from a 9-Volt barrel connector, and the USB voltage from the
USB-serial/I2C, or supplied via four test points (TP1 and TP7 for 5V, TP6 for 3.3V and TP5
for variable supply voltage).
Using USB power, the 3.3V and 5.0V supplies are limited to 500 mA. Using the 9V
supply, both 3.3V and 5.0V are capable of up to 1A. When using an external supply, the
board is limited to a maximum of 5A, imposed on the breadboard contacts.
Out of the Box Experience
The board comes with a PIC16F1719 installed and all jumpers are configured for an out
of the box demo, displaying a small subset of board features. Simply connect the MicroUSB Cable from J18 to one of the PC’s USB ports and press <S1> and <S2> to step
through each section of the application code. Lab manuals and additional labs are
available on the Microchip web site at http://www.microchip.com/explorer8. All jumpers
are configured for an out of the box demo.
Board Layout
Microchip Technology Inc. • 2355 West Chandler Blvd. • Chandler, AZ 85224-6199
The Microchip name and logo, the Microchip logo, and MPLAB are registered trademarks of Microchip Technology
Incorporated in the U.S.A. and other countries. All other trademarks mentioned herein are property of their respective
companies. © 2015, Microchip Technology Incorporated, Printed in the U.S.A. All Rights Reserved. 07/15
The Explorer 8 Development Board is shown in Figure 1.
The 28/40-pin socket, the 8/14/20-pin socket, and the 80/84/44-pin PIM socket are
provided for connecting a wide range of 8-Bit PIC® MCUs. ICSP™ programming/
debugging connectors J26 or J12 are used to accommodate PICKit™, REAL ICE™ or
ICD 3.
Jumpers 2, 14, 24 and 30 control the source of voltage for the Explorer 8. The user can
select between the 3.3V, 5.0V and the variable supply voltage. The on-board linear
regulators support up to 1A when connected to the 9-Volt DC supply. These voltages
can be measured via test points such as TP1 and TP7 for 5.0V, TP6 for 3.3V and TP5
for the variable supply. The board can also be fully powered from the Micro-USB
connector which can also be used for USB-serial/ I2C communications. The blue
potentiometer R25 adjusts a variable voltage for analog measurements.
Explorer 8 Development Board Layout and
Schematic Quick Start Guide
Configurable in-line
expansion connector
Digilent Pmod™
5.0V, 3.3V & Variable
sdsPower supplies
PG164130 PICkit™ 3 Programmer/Debugger
DV244005 REAL ICE™ Programmer/Debugger
MCC MPLAB® Code Configurator
MPLAB® X8 Compilers
Microcontroller sockets: 8, 14, 20,
28, 40, 80-Pin PIM
2x16 LCD Displays
Additional Recommended Equipment and Software
mikroBUS™ Headers
A MCP2221 driver is required for I2C™ or serial operation and can be
downloaded, along with a terminal program, from the Microchip web site at:
Two MikroElektronika Click boards may be loaded into the sockets J32 or J35.
Various communication ports and interfaces are controlled by Jumpers J41 through
J50. Power and ground for the Click boards is supplied through the existing
connections to the sockets.
Two Digilent Pmod interfaces are available on the bottom middle of the Printed
Circuit Board (PCB). Both sockets are the 12-pin version of the Digilent Pmod and
provide eight I/O signal pins, two power pins and two ground pins. The signals are
arranged so that they provide two of the 6-pin interfaces stacked.
Legacy Expansion Header for PICtail daughter card connectivity or user access to
MCU pins is also available on the Explorer 8. Combining the PICtail connector with
the J33 connector creates a completely configurable in-line connector capable of a
power of 3.3V or 5.0V.
USB to
I2C™/ Serial
and USB
J18 is a Micro-USB serial style connection for USB to serial/I2C. This device will
enumerate at both an I2C and a serial peripheral via a COM port on a PC.