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Altera_Forum's avatar
Altera_Forum
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13 years ago

Some problem about CPLD EPM570

Hello, I have some problems about EPM570. What's the GCLK maximum value that could be accepted? I searched datasheet and found it can input higher than 100 MHz. But I input a 100 MHz XTAL and C...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Hello,

But if I input a 80 MHz XTAL and CPLD can output the correct signal.

And the I/O pin is also can be detected,.

I don't know why 80 MHz can be detected but 100 MHz can't.

Thanks

jacklee