| 摘要 |
PROBLEM TO BE SOLVED: To provide a configuration for simultaneously conducting reception storage and transmission preparation, in a CAN module using a single-port memory. SOLUTION: The CAN module is provided with; a message buffer which is constituted in a single-port memory and buffers a plurality of transmitted and received messages; a transmission and reception circuit which includes shift register groups which store transmission messages to be transmitted to a transmission path and reception messages transmitted from the transmission path, and transmits and receives the messages according to a prescribed protocol; and a message handling part which stores the reception messages from the shift register groups in the message buffer and loads the shift register groups with the transmission messages. In this case, the message handling part executes processing of loading the shift register groups with the identifiers (IDs) of the transmission messages with higher priority than the processing of storing the data part of the reception messages stored in the shift register groups. COPYRIGHT: (C)2007,JPO&INPIT
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