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EXPLORER 16 DEVELOPMENT
BOARD USER ’S GUIDE
Chapter 4. Explorer 16 Development Hardware
4.1
4.2
INTRODUCTION
This chapter provides a more detailed description of the hardware features of the
Explorer 16 Development Board.
HARDWARE FEATURES
The key features of the Explorer 16 board are listed below. They are presented in the order
4.2.1
Processor Support
The Explorer 16 board has been designed to accommodate both permanently mounted
(i.e., soldered on) and detachable PIM processors. Slider switch, S2, allows the user
to choose which processor to use. This makes it possible for the Explorer 16 board to
support most 3V, 16-bit, pin compatible microcontrollers with appropriate PIMs.
PIMs are visually indexed for proper installation. The PIM is always installed with the
notched corner mark on the corner of the PIM board oriented to the upper left corner.
Current revisions of the board do not have a permanently mounted microcontroller in
U1. In order for the board to work, therefore, S2 must always be left in the “PIM” posi-
tion. In future versions with a permanently mounted PIC24 device at U1, setting S2 in
the “PIC” position will enable the on-board device and disable the PIM socket.
4.2.2
Power Supply
There are two ways to supply power to the Explorer 16 board:
? An unregulated DC supply of 9V to 15V (preferably 9V) supplied to J12.
For default functionality, a power supply with a current capability of 250 mA is
sufficient. Since the board can serve as a modular development platform that can
connect to multiple expansion boards, voltage regulators (Q1 and Q2) with a
maximum current capability of 800 mA are used. This may require a larger power
supply of up to 1.6A. Because the regulators do not have heat sinks, long-term
operation at such loads is not recommended.
Note:
The Explorer 16 kit does not include a power supply. If an external supply
is needed, use Microchip part number AC162039.
? An external, regulated DC power supply that provides both +5V and +3.3V can be
connected to the terminals provided (at the bottom left side of the board, near S3).
Note:
Do not attempt to power the Explorer 16 board using the MPLAB ICD 2
module. It is not designed to be a USB bus power source.
One green LED (D1) is provided to show when the Explorer 16 board is powered up.
The power-on LED indicates the presence of +3.3V.
? 2005 Microchip Technology Inc.
DS51589A-page 27
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