Forum Discussion
Altera_Forum
Honored Contributor
Honored Contributorsome problem about PLL
I have two fpga boards. I download a programe in the two board. One of it does not work. Then I find that if I don't use PLL the two board work properly. I think if the board can't work but the other can work, I think it is the board have problem. But when didn't use pll the board can work properly. the pllproblem is not a hardware problem. I am confused. Who can help me.(I use the EP2C8Q208CT and use the pll with megawiazd)
Thank you very much.4 Replies
Altera_ForumYou are so great! The pll voltage is the problem. I have got it. Thank you
very much!- Altera_Forum
Check PLL voltages and caps. PLLs are powered separatedly.
- Altera_Forum
Yes I did it. I use download one programe to two fpga board. One of board
can work properly. The other can work properly without pll , but cann't work properly with pll. I don't know it is a hardware problem or sofeware problem. - Altera_Forum
Did You constrain Your design properly? No timing warnings?
