| 摘要 |
PROBLEM TO BE SOLVED: To provide a pseudo fault generation circuit capable of falsely generating a fault with respect to line data on an optional position in block data and obtaining accurate error information. SOLUTION: Only when an output side valid flag 3 is set up, a line counter circuit 7 is counted up. A comparator circuit 8 compares the count value of the circuit 7 with the value of a line indication register 5. When a pseudo fault instruction from a pseudo fault indication bit 6 is inputted through an AND circuit 9, a fault generation circuit 10 edits line data outputted front an output side register 1 to convert the data into line data causing the generation of a fault. A fault detection circuit 11 checks line data outputted from an input side register 2 and outputs a fault generation signal. An error register 15 individually stores a fault generation signal inputted through an AND circuit 14 or an AND circuit 12. |
