chipKIT™ uC32™ Board Reference
Manual
Revision:
July 17, 2012
Note:
This document applies to REV A of the board.
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Overview
The chipKIT uC32 is based on the popular
Arduino™ open-source hardware prototyping
platform and adds the performance of the
Microchip PIC32 microcontroller.
The uC32 is the same form factor as the
Arduino Uno board and is compatible with
Arduino shields. It features a USB serial port
interface for connection to the IDE and can be
powered via USB or an external power supply.
The uC32 board takes advantage of the
powerful PIC32MX340F512 microcontroller.
This microcontroller features a 32-bit MIPS
processor core running at 80Mhz, 512K of
flash program memory and 32K of SRAM data
memory.
The uC32 can be programmed using the Multi-
Platform Integrated Development Environment
(MPIDE), an environment based on the original
Arduino IDE modified to support PIC32. It
contains everything needed to start developing
embedded applications.
In addition, the uC32 is fully compatible with
the advanced Microchip MPLAB® IDE and the
PICKit3 in-system programmer/debugger.
The uC32 is easy to use and suitable for both
beginners and advanced users experimenting
with electronics and embedded control
systems.
The uC32 provides 42 I/O pins that support a
number of peripheral functions, such as UART,
SPI, and I
2
C ports and pulse width modulated
outputs. Twelve of the I/O pins can be used as
analog inputs or as digital inputs and outputs.
Features include:
•
Microchip® PIC32MX340F512H
microcontroller (80 Mhz 32-bit MIPS,
512K Flash, 32K SRAM)
compatible with many existing
Arduino code samples and other
resources
Arduino Uno form factor
compatible with many Arduino shields
42 available I/O pins
two user LEDs
PC connection uses a USB A > mini
B cable (not included)
12 analog inputs
3.3V operating voltage
80Mhz operating frequency
75mA typical operating current
7V to 15V input voltage
(recommended)
20V input voltage (maximum)
0V to 3.3V analog input voltage range
+/-18mA DC current per pin
•
•
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•
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•
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chipKIT uC32 Reference Manual
chipKIT uC32 Hardware Overview
The uC32 has the following hardware features:
1. 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 uC32 board. This can also be used to power the uC32 board when connected
to the PC.
Doc: 502-254
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chipKIT uC32 Reference Manual
2. JP3 – Microchip Debug Tool Connector
This connector is used to connect Microchip programmer/debugger tools, such as the
PICkit™3. This allows the uC32 board to be used as a traditional microcontroller
development board using the Microchip MPLAB
®
IDE.
3. J4 – External Power Connector
This is a 5.5mm x 2.1mm barrel connector used to power the uC32 board from an external
power supply. It is wired with the center terminal as the positive supply voltage. The power
supply voltage must be in the range 7V to 15V.
4. Power Supply – 3.3V Regulator
Voltage regulator for the 3.3V power supply. This power supply can provide up to 500mA
of current.
5. JP2 – Power Select Jumper
This jumper is used to route power from the external power connector through the on-
board 5V voltage regulator or to bypass the 5V regulator. The REG position routes power
through the 5V regulator. The BYP position bypasses the on-board 5V regulator. With this
jumper in the BYP position the maximum input voltage that can be applied at the external
power connector is 6V.
6. Power Supply – 5V Regulator
This on-board 5V voltage regulator regulates the input voltage applied at the external
power connector to 5V. This is used to power the 3.3V regulator and to provide 5V power
to expansion shields. This regulator can provide up to 800mA of current.
7. J2 – Shield Power Connector
This connector provides power to I/O expansion shields connected to the board.
8. PIC32 Microcontroller
The PIC32MX340F512H microcontroller is the main processor for the board.
9. J7 – Analog Signal Connector
This connector provides access to analog/digital I/O pins on the microcontroller.
10. JP6/JP7 – A4/A5 Signal Select Jumpers
These jumpers are used to switch pins 9 and 11 on connector J7 between analog inputs
A4 and A5 or the I
2
C signals SDA and SCL.
11. J8 – SPI Signal Connector
This connector provides alternative access to the SPI signals. This is used by some
shields for access to the SPI bus.
12. JP5/JP7 – SPI Master/Slave Select Jumpers
These jumpers are used to switch the SPI signals for use of the uC32 board as an SPI
master device or as an SPI slave device. Both jumpers should be switched together. Place
the shorting blocks in the MASTER position for master operation and in the SLAVE
position for slave operation. Normally, these jumpers are in the MASTER position.
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chipKIT uC32 Reference Manual
13. User LEDs
Two LEDs connected to digital signal pins 13 and 43.
14. J6 – Digital Signal Connector
This connector provides access to digital I/O pins on the microcontroller.
15. JP4 – Pin 10 Signal Select Jumper
16. This jumper is used to switch connector J5 pin 5 (digital signal 10) between pulse width
modulator (PWM) operation and SPI operation. The jumper is placed in the RD4 position for
PWM output and in the RG9 position for SPI slave operation. The shorting block on this
jumper will normally be in the RD4 position. The only time it normally needs to be in the RG9
is when using the Uno32 board as an SPI slave device.
17. J5 – Digital Signal Connector
This connector provides access to digital I/O pins on the microcontroller.
18. Communications Status LEDs
These LEDs indicate activity on the USB serial interface.
19. Reset Button
This button can be used to reset the microcontroller, restarting operation from the boot
loader.
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chipKIT uC32 Reference Manual
chipKIT uC32 Jumper Settings
The chipKIT development platforms use a Microchip PIC32 microcontroller. These are 32-bit
products that bring unprecedented features to the Arduino community. In order to maintain
compatibility with existing hardware and software, additional jumpers and row headers are
provided. This document describes the functionality of the jumpers listed in the figure below.
chipKIT uC32 Jumpers
Jumper
JP2
Function
POWER SELECT:
Used to connect/bypass the on-board 5V regulator when
using an external power supply connected to J4.
J4 supply is regulated (i.e., 5V will be
present on 5V pin)
J4 supply bypasses regulator (i.e.,
Supply voltage will be present on 5V
pin)
Note:
To protect the PIC32 MCU, a 3.3V on-board regulator will always be
enabled regardless of JP2 settings.
Note:
If you’re not sure what POWER SELECT does, be safe and keep JP2 on
the two right-most pins so the J4 supply is regulated.
JP4
PWM/SPI SLAVE:
Configures pin 10 on J5 to be used as a PWM output or a
Slave Select input for use as an SPI slave device.
Pin 10 configured as an SPI SS input
Pin 10 configured as a PWM output
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Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners.
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