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chipKIT™ DP32™ Board Reference Manual

Functional Description

The PIC32MX250F12B microcontroller features a 32-bit MIPS processor core capable of running at up to 50 MHz.

The DP32 operates the microcontroller at 40 MHz by default. The microcontroller features 128 KB of flash program

memory and 32 KB of SRAM data memory. Programming the DP32 can be done using the MPIDE or with the

advanced Microchip MPLAB® IDE with the addition of a PICKit3 or chipKIT PGM in-system programmer/debugger.

The DP32 provides 19 I/O pins located on two through-hole header footprints. Some pins share functions with the

onboard circuits, such as the on-board 8 MHz oscillator or USB data lines (see the schematic for details). If these

peripherals are needed in the design, then the microcontroller can be reconfigured to allow these pins to be

utilized for other purposes. Nine of the digital I/O pins are shared with the analog inputs and can be used as analog

input pins.

The PIC32MX250F128B microcontroller supports peripheral functions such as UART, SPI, and I

width modulated outputs. To use the peripheral functions, the PIC32MX2xx family of microcontrollers features a

mappable I/O system called peripheral pin select (PPS), which allows select peripheral functionality to be mapped

to multiple pins on the device. The default DP32 MPIDE environment provides a specific mapping of peripheral

functions to microcontroller pins. This default pinout can be over-ridden by the user's sketch if a different mapping

is desired.

Additional features of the board include an 8-pin DIP header labeled IC4 that is mapped for use with a customer

supplied Microchip 25LC256 EEPROM. The SPI bus and power signals are mapped to the correct pins so that the

user can solder in an 8-pin dip socket or directly solder the IC into the holes. Similarly, the IC3 header on the board

is mapped for a customer supplied Microchip MCP9701A analog temperature sensor.

chipKIT DP32 Hardware Overview

The DP32 has the following hardware features:

1. J2 – USB Connector for USB Serial Converter:

This connects to a USB port on the PC to provide the communications port for the MPIDE to talk to the

DP32 board. This can also be used to power the DP32 when connected to the PC.

2. JP6 – Microchip Debug Tool Connector:

This connector is used to connect ICSP tools, such as the PICkit™3 or Digilent chipKIT PGM. This allows the

DP32 board to be used as a traditional microcontroller development board using the Microchip MPLAB®

IDE.

3. J6 – External Power Screw Terminal Connectors:

This screw terminal connector may be used to provide up to 15VDC to the DP32. The polarity of the

terminals is marked on the silkscreen and must be followed to avoid damaging the board.

4. JP7 – Power Select Jumper:

This jumper may be set to either power the DP32 via USB (J2), or Screw Terminal (J6). To power via USB,

set the jumper to short the pins with VIN and VUSB. To power via external supply, short the two pins at

JP7.

Other product and company names mentioned may be trademarks of their respective owners.

C, as well as pulse-

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