CAN Interface
================

+-----+------------+----------------------------------------------------------+-------+-----+
| Pin | Signal     | Description                                              | type  | I/O |
+=====+============+==========================================================+=======+=====+
| 76  | CAN1-TX    | This is the transmit signal to the CAN bus transceiver.  | VDDIO | O   |
+-----+------------+----------------------------------------------------------+-------+-----+
| 81  | CAN1-RX    | This is the receive signal from the CAN bus transceiver. | VDDIO | I   |
+-----+------------+----------------------------------------------------------+-------+-----+
| 34  | CAN2-TX    | This is the transmit signal to the CAN bus transceiver.  | VDDIO | O   |
+-----+------------+----------------------------------------------------------+-------+-----+
| 36  | CAN2-RX    | This is the receive signal from the CAN bus transceiver. | VDDIO | I   |
+-----+------------+----------------------------------------------------------+-------+-----+
| **Module**       | **Remark**                                                             |
+------------------+------------------------------------------------------------------------+
| TX27, TX51, TX8M | Not available – default functions are used on these pins.              |
+------------------+------------------------------------------------------------------------+

Some TX modules provides a FlexCAN communication controller that implements the CAN protocol according to the CAN 2.0B protocol specification. The CAN protocol was designed primarily (but not solely) to meet requirements suitable for a serial data bus in vehicle applications, including: real-time processing, reliable operation in the EMI environment of a vehicle, cost-effectiveness, and sufficient bandwidth. A CAN Transceiver is needed on the baseboard to connect the system to the CAN bus. The Texas Instruments SN65HVD23x operates with a single 3.3V supply and can be connected directly to the 3.3V TX modules:

.. figure:: ../images/can_interface.png
   :align: center