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Altera_Forum
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18 years ago

Large Timing discrepancy between 6.0 and 7.1

Hi, I find a big discrepancy in the maximum frequency when using the default settings for Quartus II 6.0 and 7.1 for one of my cores. Using Quartus II 6.0 I get a maximum frequency of 162....
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Hi Raul,

You could have a compare between compile log, to see if there is any latch detected. I met the large timing discrepancy before, and I found the 7.1 detected much of the latch in the design while 6.0 not recognise it as latch. After I have fixed these latch, the timing change back common.So you could have a look of the warning message.