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Altera_Forum's avatar
Altera_Forum
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12 years ago

Is it save to use the PIO in QSYS

Hello, I have several PIOs in my QSYS design to communicate with some of my own designed IPs. My IPs mostly use other clock signals than the PCIe-Clock and are therefore not synchronized to t...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

Your are right.If PIO and IP Clocks are different then there may be a chance that system goes into the metastable state.

But I don't understand the reason for using different clock for Pulsecounter and PIO.I think you can use the same clock for both Pulsecounter and PIO and can use Avalon Clock Crossing Bridge between Avalon Master and PIO if your Avalon Master is running at frequency other then PIO frequency.