| 摘要 |
<p>PURPOSE:To select programs accurately with a stable operation, by changing the recognition flag only when the value obtained by counting the time, when the same state is held, from the change time of the input flang reaches a prescribed value. CONSTITUTION:Processor CPU checks inputs of I/O circuits I/O1-I/O3 at a fixed period, and checks the input of I/O1 only when this check is required for malfunction prevention. Consequently, I/O1 is turned on only after completion of generation of the noise signal when the input is required, and I/O1 gives the binary signal from low-pass filter LPF to CPU. For the purpose of recognizing the input flag, which indicates change of the binary signal, and its change, control part CT changes the recognition flag when the value obtained by counting the time, when the same state is held, from the change time of the input flag reaches a prescribed value; and control part CT does not change the recognition flag when the value above does not reaches the prescribed value. As a result, the operation can be stabilized to select programs accurately.</p> |
