Digilent MX3cK - Manual (Page 16)

Cerebot MX3cK Reference Manual
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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.
J1 USB Connector
This is a USB-mini B connector used to access the USB serial converter connected
to UART1.
J2 I2C Daisy Chain Connector
This connector provides access to the I
2 C data signals and board power signals.
Multiple I 2 C devices can be daisy chained from this connector to create an I 2 C bus.
J3 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
Cerebot MX3cK board. This connector is not loaded at the factory.
J4 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 chipKIT 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
2 C pullup resistors.
Remove the shorting blocks the disable the on-board pull-up resistors.