Forum Discussion
Altera_Forum
Honored Contributor
13 years ago --- Quote Start --- How can this be? --- Quote End --- Its hard to say. There are several synthesis attributes - you could try a couple of others to see if it makes any difference. If you're at the top-level of the design, you can always route the signal to an I/O pin. This may force Quartus to eliminate some optimizations - you don't have to probe the I/O pins, you still use SignalTap - its just a way to try and figure out what is going on. Cheers, Dave