| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor integrated circuit in which the increase of terminals for inspection to inspect the operation of the integrated circuit is restricted. SOLUTION: When an SW signal is high level, an analog switch 4 is turned off, and an output signal (IN) from an output block 1 to an output drive circuit 2 and the operation of an output terminal are the same as in a conventional circuit. When the SW signal is low level, the output signal (IN) to the output drive circuit 2 is shut in the output drive circuit 2, and an output terminal of the output drive circuit 2 is turned to a high impedance. At the same time, the analog switch 4 is turned on, so that an internal signal S of the integrated circuit can be outputted to the output terminal. The internal signal of the integrated circuit can be monitored with the use of this terminal.
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