U.S. Patent No. 5,574,848 Kvaser CAN Pages, CAN Introduction U.S. Patent No. 5,574,848 Can interface selecting one of two distinct fault recovery method after counting a predetermined number of recessive bits or good can frames INVENTORS:Thomson; Thomas W., Santa Cruz, CA ASSIGNEES:National Semiconductor Corporation, Santa Clara, CA ISSUED:Nov. 12, 1996  FILED:Aug. 24, 1993 Abstract A CAN node with a CAN protocol controller device reconnects to a CAN bus from the node's busoff state only after the node has successfully decoded a plurality of good messages from other devices on the CAN bus. Reception of a plurality of good messages advantageously provides a CAN protocol controller device which exits its busoff state with a high degree of confidence that the fault that caused the node to enter the busoff state has been cleared.