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Altera_Forum
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11 years ago

SDC constraints for DE Boards Audio Codec WM8731

In examples provided by Terasic there are no constraints for chipset WM8731 for playing/recording audio but when expanding examples I see noise on audio signal recorder from LINEIN and played back to...
Altera_Forum's avatar
Altera_Forum
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11 years ago

Yes, with and without constraints.. This seem a PVT (process, voltage, temperature) variance problem that design can not manage without proper constraints but now is difficult (time consuming) to check if your constraints are fine..