Flip-flop device selection
| FD | D flip-flop |
| FDE | D flip-flop with clock Enable |
| FDC | D flip-flop with asynchronous Clear |
| FDCE | D flip-flop with clock Enable and asynchronous Clear |
| FDP | D flip-flop with asynchronous Preset |
| FDPE | D flip-flop with clock Enable and asynchronous Preset |
| FDCP | D flip-flop with asynchronous Clear/Preset |
| FDCPE | D flip-flop with clock Enable and asynchronous Clear/Preset |
| FDR | D flip-flop with synchronous Reset |
| FDRE | D flip-flop with clock Enable and synchronous Reset |
| FDS | D flip-flop with synchronous Set |
| FDSE | D flip-flop with clock Enable and synchronous Set |
| FDRS | D flip-flop with synchronous Reset/Set |
| FDRSE | D flip-flop with clock Enable and synchronous Reset/Set |