| 摘要 |
PURPOSE:To eliminate the difference of set up and hold time of data by making a 1<st> bit and a n<th> bit of a bi-directional flip-flop circuit of (n) numbers to be adjacent, and arranging them on a signal input terminal side. CONSTITUTION:The order of the layout arrangement of the bi-directional flip- flop circuit of 1-10 is, for example, the 1<st> bit, 10<th> bit, 2<nd> bit, 9<th> bit, ...5<th> bit, 6<th> bit. The set-up and hold time of the data in such a case is decided by the input timing of the shift clock input terminal 13 and the DATA input terminal 11 of the bi-direction flip-flop circuit 1 of the 1<st> bit. Also, the output delay time is decided by the input timing of the shift clock input terminal 13 and the input/output terminal 11 of the 10<th> bit bi-direction flip-flop circuit 10. Thus, the set-up and hold time and the delay time of the data at the time of left shift and right shift can be made the same. |
