| 摘要 |
PROBLEM TO BE SOLVED: To maintain a cell data length at a fixed value and to reduce the capacity of a buffer memory by continuing to successively overwrite data that exceeds a fixed number in the leading address of the next cell when long cell data is transferred. SOLUTION: When both a receiving enabling signal 17 and a data transfer signal 18 are active, a write clock 15 is synchronized and data 16 is inputted. In the case of including a long cell data section 1 where the data number of the data 16 is more than a specific value 53, when a producing means of a write address signal 21 detects a header information signal 19 with the signal 17 on an H level and the signal 18 on an L level, the increment of a write address is performed. When a 2nd header information signal is not detected even if the data number exceeds a fixed value, the increment of the write address is suspended, the numeric value of the same address position is continuously outputted, error data of a section 3 are continuously overwritten in the write address and the increment is resumed from the 53 when 2nd header information is detected.
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