| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a flip-flop capable of realizing a scan function and a flip-flop operation, using few components. <P>SOLUTION: The flip-flop includes: a first latch circuit 21 for latching input data at leading of a clock CLK; a second latching circuit 22 for latching the input data at trailing of the clock CLK; and an output selector 23 for outputting output data from the first latch circuit 21 to a data output terminal Q for the H level period of the clock CLK, and outputting output data from the second latching circuit 22 to the data output terminal Q for the L level period of the clock CLK. Moreover, the flip-flop is provided with a circuit 24 for selectively connecting a scan data input terminal SI or a data input terminal D to the first latching circuit 21, and a circuit 25 for selectively connecting the output of the first latching circuit 21 or the data input terminal D to the second latching circuit 22. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
