| 摘要 |
PURPOSE:To respond to an external interruption quickly and to improve the efficiency of the interruption processing by short-circuiting a sampling circuit with a switch circuit when the noise preventing function of an interruption control circuit is unnecessary. CONSTITUTION:The interruption control circuit to which an interruption signal 5 is inputted from an external device 1 is provided with a sampling circuit 2 which samples the signal 5, and a noise component of the signal 5 is eliminat ed by the circuit 2 tosupply the signal 5 to an interruption signal generating circuit 3, and an interruption signal generated by the circuit 3 is inputted to a computer. A switch circuit 4 is connected to the input side and the output side of the circuit of this control circuit. If the noise component of the signal 5 from the device 1 is small and the noise preventing function of the circuit 2 is unnecessary, the circuit 2 is short-circuited by the switch circuit 4 to respond to the signal quickly, and the interruption processing is performed efficiently. |
