| 摘要 |
PURPOSE:To detect a data fault by extracting a frame pattern signal in a reception data together with a clock signal at a reception section and comparing the signal with a frame pattern signal generated by the reception section. CONSTITUTION:A comparison section 6 between a reception frame pattern signal 16 sent from a reception section 1 and a transmission frame pattern signal 24 generated by a transmission section 2 and a clock detection section 9 are provided. Then the signal 16 is extracted from a reception data signal 11 and the signal 24 is generated synchronously with a clock signal 14 and when the signal 11 is interrupted, the comparison section 6 detects the dissidence between the signals 16 and 24. Further, the detection section 9 detects the interruption of the reception clock signal. Thus, both the clock interruption and the data signal interruption are detected.
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