| 摘要 |
PURPOSE:To facilitate external monitoring of the actual conditions of a plurality of measuring points in an integrated circuit during operation and eliminate the necessity of adding external terminals even if the measuring points in the integrated circuit are increased by adding at least three specific terminals to the integrated circuit. CONSTITUTION:An integrated circuit 100 is constituted by three input terminals (IN) 1, 2 and 3, two output terminals (OUT) 5 and 6, the 1st - the 4th AND gates 10-13, an OR gate 20, 1st and 2nd flip-flops (F/F) 30 and 31 of which a shift registor is composed and 1st - the 5th circuit blocks (CT) 50, 60, 70, 80 and 90 which are connected in cascade. If a set value in the 1st and the 2nd flip-flops 30 and 31 of the shift registor is varied by the input terminal 7 and the respective outputs of the 1st - the 4th circuit blocks 50, 60, 70 and 80 are selected and outputted through the OR gate 20 from the output terminal 6, the output contents of the respective circuit blocks can be monitored from outside the integrated circuit 100.
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