The actual implementation rettransmitts the frame once the Core lost arbitration or error occured. The repetition of the re-transmission can be limited by the user. However if the retransmitt limit option is disabled the frame will re-transmitt forever and might possibly block this core for longer time. The aim of this task is to detect if higher priority frame is present in either of TX Frames before re-transmitting the frame. If yes, the actual frame should be dropped, and the higher priority frame should be loaded to CAN Core for transmission. The behaviour must be configurable from user-registers. Thus user can choose whether the frame will be dropped or re-transmitted in presence of higher priority frame in the buffer. The implementation involves comparison between the actual frame identifier in the CAN Core and the Identifiers in the TX buffers. This feature will be implemented in the TX Arbitrator circuit or Protocol Control FSM.