| 摘要 |
PROBLEM TO BE SOLVED: To detect a break of a connection circuit between LSIs without any interruption of data processing by the respective LSIs and to easily locate the break part. SOLUTION: A data processing part 1 carries out data processing of previously decided contents on an inputted data signal 31 and outputs it as a data signal 32. A circuit break detection part 3 is synchronized with a circuit break detection clock 35, detects a break of the connection circuit between the LSIs (not shown) connected to the pervious step according to a result of the detection of the inspection signal, which is inserted into the data signal 31 outputted from the LSI connected to the previous step, and outputs a circuit break detection alarm 34. A pattern signal insertion part 2 inserts the inspection signal to the data signal 32 for detection of the break of the connection circuit with the LSI (not shown) connected to the following step by the LSI connected to the following step and outputs it to the LSI connected to the following step.
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