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Altera_Forum's avatar
Altera_Forum
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16 years ago

Constraining global signals

I seem to be having difficulty constraining signals as globals. I have a user I/O pin that I am using as a low speed clock to a bank of registered I/OB's ("fast input registers"). So far so goo...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

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not sure if its your version of Quartus or another issue but i just tried it with Quartus II 9.0 and I see my signal on a GCLK in the Resource Selection from the Fitter report.

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Just out of curiosity, what target device did you use? We downloaded the 30-day eval version of QII9.x without programming support, and had the same trouble with our .qsf and .vqn.

You used :

set_instance_assignment -name GLOBAL_SIGNAL ON -to ACH1B_CNTL[12]

Right?