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12/21/2018
6. IC4 – SPI EEPROM () Device (Microchip 25LC256) Loading Point
This 8-pin DIP footprint is designed so that a SPI controlled EEPROM () device could be added at a later time if desired. It is intended
that an 8-pin DIP socket or a Microchip 25LC256 device would be soldered into this location. The SPI signals for communicating with
this EEPROM () device are tied directly to SPI 2 on the PIC32.
7. VR1 – Analog Potentiometer
An analog potentiometer connected to chipKIT analog pin A2. When rotated fully counter clockwise, 0V is read on the pin. When
rotated fully clockwise, 3.3V is read on the pin.
8. IC3 – Analog Temperature Sensor (Microchip MCP9701A) Loading Point
This 3-pin footprint is intended for an analog temperature sensor to be loaded by the user. It was designed with the Microchip
MCP9701A Linear Active Thermistor in mind. Pin one (square pad) is for VCC3V3 of the device, pin two (center pin) is for the VOUT
pin of the device, and pin three is for the ground pin.
9. User LEDs
Four LEDs connected to digital signal pins 11, 12, 13, and 14. These LEDs are labeled as PIN_LED1, PIN_LED2, PIN_LED3, and
PIN_LED4 respectively in MPIDE.
10. IC1 PIC32 Microcontroller
The PIC32MX250F128B microcontroller is the main processor for the board.
11. 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. Note that the square
pad is pin 1.
Rev C change: This header is reversed from Rev B. When attaching the
debugger tool, it would appear right-side up when attached to Rev C, and up-
side down when attached to Rev B (see images). Be sure you know which Rev
you have. The square solder pad should connect to pin 1 on the debugger. Attaching the debugger incorrectly will almost certainly fry
either the DP32, the debugger, or both. Please refer to the section titled "Programming the DP32" of this manual for more information
on using a debugger.
12. Reset Button
When pressed, the microcontroller resets the currently loaded sketch. If Button
2 (BTN2/PGM) is held down while pressing the reset button, the
microcontroller will start from the boot loader, allowing a new sketch to be
loaded.
13. BTN2/PGM and BTN3 User Buttons
These user buttons are connected to digital signal pins 1 and 17. They produce a
logic high signal when depressed, and a logic low signal when released. When
using MPIDE, these buttons are defined in the core files as PIN_BTN_1 and PIN_BTN_2 respectively.
14. JP4/JP5 – Pullup/Pulldown jumpers
These jumpers are used to add pullups or pulldowns to the digital signal pins 2 and 3. Pullups are necessary when utilizing I2C on these
two pins. These two jumpers can be used as settable logic states either pulled high or pulled low depending on the jumper settings. In
addition, if no pullups or pulldowns are desired, the jumper may be safely removed completely, allowing the pins to be used for other
input/output purposes.
15. J4 – Digital and Analog I/O Connector #1
The set of Digital I/Os with chipKIT numbers 0 through 8 and Analog pins
A0-A2. See Pinout Diagram and Pinout Table for more details.
Rev C change: The silk screen on Rev B (image →) shows the port assignments
on the chip, not the MPIDE pin assignments. Also, the holes are not offset,
requiring headers to be soldered to the board.
16. Prototyping Area
The prototyping area has 288 through holes, broken into two main sections. One section has 28 3-hole busses. Between the 3-hole
busses are two 14-hole busses. There are also a 3V3 bus and GND () bus, each with 8 holes. The remaining 160 holes are isolated for
mounting whatever will fit using standard solder or wire wrapping methods.
https://reference.digilentinc.com/chipkit_dp32/refmanual
chipKIT DP32 Reference Manual [Reference.Digilentinc]
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