| 摘要 |
PURPOSE:To hold an asynchronizing signal in an optional state by transmitting an input asynchronous signal as it is or delivering the signal to a state change recognizing circuit after holding it for a prescribed period of time. CONSTITUTION:A state flip-flop 3 holds a state where a working state is defined. A decoding circuit 4 decodes the output of the flip-flop 3 and delivers an asynchronizing signal. A state holding circuit 5 supplies the asynchronizing signal delivered from the circuit 4 to transmit the input synchronizing signal as it is or to delivery it to a state change recognizing circuit 2 after holding it for a prescribed period of time based on the holding control information supplied from a holding information flip-flop 6. The circuit 2 recognizes the state changes and informs them to the flip-flop 3.
|
