| 摘要 |
<P>PROBLEM TO BE SOLVED: To implement multiplex communication having excellent responsiveness in a communication system applying start-stop synchronous serial communication to a bus communication path. <P>SOLUTION: A coding/decoding part 22 comprises: a coding circuit 27 for coding transmission data TXD of a NRZ code composed of block data output from a UART to a transmission path code (PWM code); a decoding circuit 28 for decoding reception data RX retrieved from a bus communication path to a NRZ code; and a bit mediation circuit 29 for comparing the transmission data TXD before coding and the reception data RXD after decoding in a bit-by-bit manner, and outputting a collision detection signal CD which becomes a high level when signal levels are mismatched (loss of mediation). With the change of the collision detection signal CD, the coding circuit 27 stops outputting data to a data bus communication path, until transmission of block data that is being output is completed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
