Intel® Quartus® Prime Software
Intel® Quartus® Prime Design Software, Design Entry, Synthesis, Simulation, Verification, Timing Analysis, System Design (Platform Designer, formerly Qsys)
Announcements
Intel Support hours are Monday-Fridays, 8am-5pm PST, except Holidays. Thanks to our community members who provide support during our down time or before we get to your questions. We appreciate you!

Need Forum Guidance? Click here
Search our FPGA Knowledge Articles here.
15539 Discussions

direction of signals in rtl viewer

Sandy
Employee
209 Views

this is from quartus rtl viewer. would like to learn how to read this diagram. 

Q is output of the flop. but why does the black arrow (circled with blue) point towards Q like it is an input to flop. 

it looks like data from mux is input into flop at Q, which is not correct. 

please help me understand this.

Thanks Y'all

ff.png

0 Kudos
3 Replies
sstrell
Honored Contributor III
198 Views

What does the vertical wire connected to that point go to?

Sandy
Employee
195 Views

ff2.png

Here is the picture showing the vertical line. It looks like it is going to a mux.  but i am not sure. 

SyafieqS
Moderator
185 Views

Hi Sandhya,


Assuming no issue with your HDL, does your rtl behave as expected if you ignore that? What Quartus type and version you are using? 


Thanks,

Regards


Reply