Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Altera_Forum
Honored Contributor I
967 Views

unused prn/clrn inputs

Noob question if I may. 

In the schematic editor, how should I pull up unused prn/clrn inputs to a flip flop? 

Currently I tie them to an unassigned input pin default vcc. Circuit works fine, but that doesn't seem right.
0 Kudos
3 Replies
Altera_Forum
Honored Contributor I
143 Views

Hi, 

 

--- Quote Start ---  

In the schematic editor, how should I pull up unused prn/clrn inputs to a flip flop 

--- Quote End ---  

 

Using Assignment Editor you can pull up, check the screenshot. 

https://www.altera.com/support/support-resources/operation-and-testing/io/io-features.html#programma... 

 

Let me know if this has helped resolve the issue you are facing or if you need any further assistance. 

 

Best Regards 

Vikas Jathar  

(This message was posted on behalf of Intel Corporation)
Altera_Forum
Honored Contributor I
143 Views

I know about pin pullups, thanks. My question was about unused flip flop inputs. Using discreet logic I would pull these up. Currently I'm assuming if I leave them unconnected the synthesizer will optimise the function out. Seems to work.

Altera_Forum
Honored Contributor I
143 Views

Hi, 

Can you please brief your question with Schematic editor (screenshot), what are you trying to do & what issue are you facing? 

 

Best Regards 

Vikas Jathar  

(This message was posted on behalf of Intel Corporation)
Reply