2017 Microchip Technology Inc.
DS50002556A-page 17
2.4
CONNECTING THE BOARD
Figure 2-2
illustrates an example CAN FD network. The MCP2517FD click Board is
plugged into the MCP251XFD CAN FD Motherboard. A CAN FD tool from K2L is
connected to the MCP2517FD click Board using twisted pair wires.
The demonstration board is powered using a Mini-USB cable. Alternatively, the board
can be powered using a 5V power supply connected between 5VIN and GND1.
There are two terminations on the CAN bus:
• Two 60 Ohm resistors in series on the MCP2517FD click Board.
• A 120 Ohm termination resistor at the connector of the K2L OptoLyzer
®
MOCCA
FD tool.
2.5
OPERATION
The user can write firmware for the MCU in order to create a custom CAN FD node.
Check the MCP2517FD product page for the firmware API and for code examples.
The RST button can be used to reset the MCU. Switches S1-S4 can be used to trigger
the transmission of CAN FD messages to the CAN FD tool. LEDs D1-D8 can be
controlled by the CAN FD tool using CAN FD messages.
All I/O pins of the MCP2517FD are easily accessible through pin headers.
The differential CAN bus signals, CAN_H and CAN_L, are accessible on the
MCP2517FD click Board, or on the DB9 connector: CAN_H on pin 7, and CAN_L on
pin 2.
FIGURE 2-2:
Connecting the MCP251XFD CAN FD Motherboard.
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