| 摘要 |
PURPOSE:To considerably reduce a data transfer time and to effectively use a buffer memory of small capacity by starting a transfer to a data pool memory in parallel with the start of the input of a data frame and completing the transfer to the data pool memory when a completion recognizing bit detects, for instance, '1' state. CONSTITUTION:A completion recognizing bit area is added to the data frame, when the input start of the data frame is detected by a data receiving part 10, a control processor 3 simultaneously instructs a transfer control to the data pool memory 4 to a data transfer control part 30 by the interruption signal and starts the transfer. At this time, when the data transfer control part 30 detects that the completion recognizing bit added in the data receiving part 10 is brought into, for instance, '1' state, it completes the transfer to the data pool memory 4. Thereby, the data transfer time can be considerably reduced and the buffer memory 20 of the small capacity can be effectively utilized.
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