Digilent MX7cK - Manual (Page 23)

Cerebot MX7cK Reference Manual
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This connector provides access to the 10/100 Ethernet port.
J12-
J14 Do Not Use.
J15 Debug USB Connector
This connector is used to connect the on-board programming and debug circuit to the PC for
use with the MPLAB IDE.
J17 External Power Connector
This is a 2.5mm x 5.5mm, center positive, coax power connector used to provide external
power to the board. The optional Digilent 5V Switching Power Supply is connected here.
J18 External Power Connector
This is a screw terminal connector used to provide external power to the board. Be sure to
observe proper polarity (marked near the connector) when providing power via this
connector, or damage to the board and/or connected devices may result.
J19 USB Device / OTG Connector
This is a USB micro-AB connector. It is used when using the PIC32MX795 microcontroller to
implement a USB device or OTG Host/Device.
J20 USB Host Connector
This is a standard sized USB type A connector. This connector is used to connect USB
devices to the board when using the PIC32MX795 microcontroller to implement an
embedded USB host.
JP1 &
JP2 CAN or Pmod Select
These jumpers select microcontroller signals RF12 and RF13 for use with CAN #1 or Pmod
connector JF. Place these jumpers in the CAN position to use CAN #1. Place the jumpers in
the PMOD position to use then with Pmod connector JF.
JP3 &
JP4 Pull-up enable for I2C1
These two jumpers are used to enable/disable the pull-up resistors on I2C1. Insert shorting
blocks on these two jumpers to enable the pull-up resistors. Remove the shorting blocks to
disable the pull-up resistors. Only a single device on the I
2 C bus should have the pull-up
resistors enabled.
JP5 CAN #1 Termination
This jumper is used to enable/disable the 120 ohm termination resistor for CAN #1. Insert the
shorting block to enable the termination resistor, remove it to disable the termination resistor.
JP6 CAN #1 5V0 Enable
This jumper is used to enable/disable providing 5V to the CAN #1 connector. Insert the
shorting block to connect the board 5V0 supply to pins 9 & 10 of CAN #1 connector. Remove
the shorting block to disconnect the 5V0 supply.
JP7 CAN #2 Termination
This jumper is used to enable/disable the 120 ohm termination resistor for CAN #2. Insert the
shorting block to enable the termination resistor, remove it to disable the termination resistor.