| 摘要 |
PROBLEM TO BE SOLVED: To provide a data transmission system combining a FIFO(first-in and first-out) and a transmission circuit and reducing interruption loads on the processor of a system (for performing HDLC(high level data link control) framing or the like, for instance). SOLUTION: The boundary information of a frame is stored in the FIFO 43 and the transmission circuit 46 reads the frame boundary information and performs a frame end and a frame start processing. Thus, the state of heavy loads where the processor 40 is required to perform interruption processing in limited time for a frame processing is avoided.
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