| 摘要 |
PURPOSE:To put this sequence circuit in operation in an optional state by providing a selector at the input of a state storing flip-flop group and providing a selector control circuit which switches the selection of a selector with a sate loading pulse. CONSTITUTION:When the sequence circuit in an optional state is put in opera tion, state values p1 - pq are set and the state loading pulse pl is generated. The selector control circuit 4 selects signals inputted to input terminals b1 - pq, i.e. state values p1 - pq as selector switching signals inputted to a terminal S before and after the latch pulse of an oscillator 1 by the generation of the state load pulse pl. Consequently, the state values p1 - pq of the state storage D flip-flop group 2 are loaded at the next rise of the oscillator 1 right after the generation of the state load pulse pl, and the sequence circuit starts operat ing in the state. Consequently, the sequence circuit can be put in operation in the optional state. |
