Digilent 410-297P-KIT User Manual

Page 18

ChipKIT MX3 Board Reference Manual

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Page 18 of 25

Appendix A: Connector Description and Jumper Settings

Label

Description

JA–JE

Pmod I/O Connectors
These are used to access the I/O pins on the PIC32 microcontroller.

JPA–JPE

Pmod Connector Power Select Jumpers
These are used to select the power supply voltage applied to the Pmod connector. Place the
shorting block in the 3V3 position (away from the board edge) to provide power from the
VCC3V3 bus to the Pmod connector. Place the shorting block in the 5V0 position (nearer the
board edge) to provide power from the VCC5V0 bus.

USB Connector
This is a USB-mini B connector used to access the USB serial converter connected to UART1.

I2C Daisy Chain Connector
This connector provides access to the I

C data signals and board power signals. Multiple I

devices can be daisy chained from this connector to create an I

C bus.

Auxiliary USB Serial Converter I/O
This connector provides access to the additional signals: CTS#, DSR#, DCD#, and RI# provided by
the FT232R serial converter. These signals are not used on the ChipKIT MX3 board. This
connector is not loaded at the factory.

External Power Connector
This is a 5.5x2.5mm coaxial power connector used to provide external power to the board. It is
wired as center positive. The maximum recommended operating voltage is 15V DC.

JP1

USB Serial converter reset disconnect
This jumper is used to disconnect the USB serial converter from the MCLR pin used to reset the
PIC32 microcontroller. The shorting block on this jumper can be removed if the USB serial
converter reset is interfering when using a Microchip development tool such as a PICkit3™ when
debugging under the MPLAB® IDE. The shorting block must be installed to use the board with
the MPIDE.

JP2

5V Regulator Bypass
This jumper is used to bypass the on-board 5V regulator. With the jumper in the REG position,
the external voltage applied at J4 is routed through the 5V regulator. If the jumper is in the BYP
position, the on-board 5V regulator is bypassed and the voltage from J4 is applied directly to the
VCC5V0 bus.

JP3

Microchip Development Tool Connector
Install a 6-pin header in this connecter to enable use of Microchip hardware debugging and
programming tools.

JP6, JP8

Pmod connector JE, SPI2 Master/Slave Select
Place shorting blocks in the M position for when operating SPI2 as an SPI master, place shorting
blocks in the S position for operation as an SPI slave.

JP10, JP11

I2C Pullup Resistor Enable
Install shorting blocks on these to enable use of the on-board I

C pullup resistors. Remove the

shorting blocks the disable the on-board pull-up resistors.