| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of a conventional data transmitter/receiver being unable cannot to cope easily with the increase/decrease in devices, because a processing speed of data write/read between data transmitters and a memory is lowered. SOLUTION: A plurality of data transmitters 31 are connected in cascade, and external data or its own data are selectively and sequentially transmitted by relaying the data transmitters and in the case of sending data from its own transmitter, a save circuit 31a saves the external data and a transmission stop signal connection 31e transmits a transmission stop instruction to a sender.
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