Forum Discussion
Altera_Forum
Honored Contributor
15 years agoi do'nt want to remove redundant logic...
i want to implement ring oscillator with NOT gates but when i synthesize it, the synthesis tool remove the redundant logic, but my requirement is to keep redundant logic.. so plz someone help me to synthesize the circuit without removing redundant logic.. (i use Xilinx ISE 9.1i)
5 Replies
- Altera_Forum
Honored Contributor
yes, xilinx forums rock for this soft of thing.
- Altera_Forum
Honored Contributor
--- Quote Start --- you r right ..... i m using it for delay...... thank u.... ok , i'll try xilinx forum.. thanks --- Quote End --- Please note that using logic cells for delays is not reliable, whatever technology you use. edit - But its probably useful for an oscilator! :rolleyes: - Altera_Forum
Honored Contributor
you r right ..... i m using it for delay...... thank u.... ok , i'll try xilinx forum.. thanks
- Altera_Forum
Honored Contributor
The question actually makes sense for creating logic cell delays, Altera has synthesis attributes for this purpose. Possibly Xilinx has similar means.
- Altera_Forum
Honored Contributor
This is an Altera Forum. Try the Xilinx forum.
But seriously - if its redundant, it has no use at all, and does nothing. what is the purpose of the redundant logic if it does nothing? Did you connect it to an output pin?