Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Synthesis error in Quartus v12 & v11

There is an apparent synthesis error in Quartus v12, v11 and possibly other versions. I found this by adding an asynchronous preset to a register bit. When this is done that register bit is not prese...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

According to the post-fit simulation, qCtrl[2] is always zero, even right out of initialization. It remains zero when reset109 is asserted and it cannot be set synchronously either. It's like the bit is hardwired to ground.