Cyclone® V Hard Processor System Technical Reference Manual

ID 683126
Date 8/28/2023
Public
Document Table of Contents

26.3.1.3. CAN Message Bits

The arbitration fields ID28-0, Xtd, and Dir are used to define the identifier and type of outgoing messages and are used (together with the mask fields Msk28-0, MXtd, and MDir) for acceptance filtering of incoming messages. A received message is stored to the valid message object with matching identifier when the direction is set to receive a data frame or transmit a remote frame. Extended frames can be stored only in message objects with Xtd is set to 1, standard frames in message objects with Xtd is set to 0. If a received message (data frame or remote frame) matches more than one valid message object, it is stored to the object with the lowest message number.