| 摘要 |
<P>PROBLEM TO BE SOLVED: To cancel a sleep state of a node of which the sleep state is not canceled by a wake-up signal, without providing a node with means for detecting the node of which the sleep state is not canceled or means for transmitting a special signal pattern via a communication bus. <P>SOLUTION: In a communication system, each of a plurality of ECUs 100 is configured to transmit/receive a frame via a communication bus 10, and in accordance with a wake-up signal transmitted from the ECU 100 of which the sleep state is canceled by an internal event, the sleep state of the other ECU 100 is canceled. The ECU 100 includes a frame detection circuit 130 which outputs a high-level signal in the case where a signal level of the communication bus 10 changes continuously specific times or more at intervals not exceeding a specific time. In the case where the high-level signal is outputted from the frame detection circuit 130 to an external interrupt terminal of a microcomputer 110, the microcomputer 110 cancels the sleep state of the relevant ECU 100. <P>COPYRIGHT: (C)2012,JPO&INPIT |
