| 摘要 |
A macro cell, a signal selector and a semiconductor integrated circuit including these parts. In a large scale integrated circuit including a built-in macro cell with two-way terminals, a testing of a single macro cell can be readily carried out in a production testing, and a signal communication between the macro cell and an external terminal can be executed in a normal operation. A designing of the large scale integrated circuit can be performed in a simple, flexible and systematic manner. A macro cell includes a two-way test exclusive terminal, a two-way user exclusive terminal, and a controller for actuating or unactuating these terminals in the testing and the normal operation. A signal selector includes two-way terminal to be connected to the test exclusive terminal of the macro cell, a macro cell connection exclusive terminal, and a controller to connect the these terminals to external terminals. The connection between the macro cell terminals and the signal selector terminals is controlled by a tmode signal.
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