| 摘要 |
<p>PURPOSE:To make it possible to receive data by correcting the extracting position of a first preamble in the case that the extracting position of the first preamble deviates by providing a transfer control circuit. CONSTITUTION:When non-coincidence is detected by a second comparison circuit 5 after coincidence is detected by a first comparison circuit 4, the transfer control circuit 11 reads out data stored in a receive data hold circuit 11-1 from its head by the data length portion of the first received preamble, and compares whether the data coincides with the corresponding set preamble 6 or not. Then, in the case that the non-coincidence is detected and even in the case that the coincidence is detected, if the non-coincidence between the second received preamble and the corresponding set preamble 8 is detected by the comparison circuit 5, it reads out the data of one byte portion after shifting the data in the data hold circuit by one bit, and keeps operation to transfer the receive data to a memory waiting temporarily until the coincidence is detected by the comparison circuit 5 afterwards. Thus, in the case that the extracting position of the first preamble deviates, the data is received by correcting this extracting position.</p> |
