| 摘要 |
PURPOSE:To increase the rate of defective detection by providing a control pin and gate circuits, and setting logical values of some or all of input and output signals in an integrated circuit to 0 or 1 fixedly. CONSTITUTION:To gate circuits 41...4n, output signals 21...2n from another circuit 2 are inputted. An integrated circuit 1 is provided with a control pin 3, and a control signal 31 inputted from the pin 3 is inputted to the circuits 41...4n in common. The circuits 41...4n ANDs the signals 21...2n, and signal 31 to send out output signals 411...4n1. Those signals are connected to the output pins 51...5n of the circuit 1. When a voltage having a level ''0'' is applied to the pin 3, voltages with the ''0'' are developed at the pins 51...5n. When a voltage having a ''1'' is applied to the pin 3, on the other hand, signals voltages of signals 21...2n of the circuit 2 are developed at the pins 51...5n. Thus, the rate of defective detection is improved. |
