Altera_Forum
Honored Contributor
Honored Contributorquestion about D flip-flop
Hi all,
I am wondering what does the PRN port in the D flip-flop used for? When PRN is deasserted, the output always stay asserted.Thanks!Forum Discussion
5 Replies
Altera_ForumIt is the preset, when preset = 0, DFF.Q = 1
- Altera_Forum
Thank you!But what does preset used for?
- Altera_Forum
it is the opposite of clrn
- Altera_Forum
Thank you!But why we need preset?
- Altera_Forum
the same reason you need clrn, but you want to reset to '1'.
