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Controller area network (CAN) device and method for controlling CAN traffic

  • US 10,361,934 B2
  • Filed: 09/28/2015
  • Issued: 07/23/2019
  • Est. Priority Date: 09/28/2015
  • Status: Active Grant
First Claim
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1. A Controller Area Network (CAN) device comprising:

  • a compare module configured to interface between a CAN protocol controller and a CAN transceiver, the compare module having;

    a receive data (RXD) input interface configured to receive data from the CAN transceiver;

    a transmit data (TXD) output interface configured to output data to the CAN transceiver;

    a CAN decoder configured to decode an identifier of a CAN message received from the RXD input interface;

    an identifier memory configured to store an entry that corresponds to at least one identifier;

    compare logic configured to compare a received identifier from a CAN message to the entry that is stored in the identifier memory and to output a match signal when the comparison indicates that the received identifier of the CAN message matches the entry that is stored at the CAN device;

    a signal generator configured to interface between the CAN protocol controller and the CAN transceiver and to output, in response to the match signal, a signal on the TXD output interface to invalidate the CAN message, wherein the signal is output from the TXD output interface to the CAN transceiver;

    wherein the signal generated by the signal generator comprises one or more dominant bits in the End Of Frame field of the CAN message.

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