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PCI Express PLL cannot lock on about 5% of all IMX7D CPUs.

Question asked by Leonid Segal on Mar 14, 2017
Latest reply on Mar 16, 2017 by igorpadykov
Branched to a new discussion


We assembled a large number of CPUs on our cards and in about 5% of them the PCI Express PLL cannot lock.

The issue can be solved by raising the 1.0V LDO to about 1.05V in part of the CPUs (this is the maximum working condition). And in part of them the voltage should be raised to 1.1V for PLL lock.

Is this a known issue?

           Thank you.