Digilent 410-280P-KIT - Manual (Page 2)

chipKIT DP32
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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 40Mhz 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 Multi-Platform Integrated Development Environment (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 as 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 can be used 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
2 C,
as well as pulse-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 a multiple pins on the device. The default DP32 board
support files provide 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 Microchip and Digilent programmer/debugger 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 directly to their right. To
power via external supply, short the two pins nearest the screw terminal.