Tool/software:
Hi, I am using AM5706 in my project. And we are facing an issue such that the PCIe link is getting down while working. AM5706 processor is acting as end point and Intel atom 3930 based COMe module (SoM) act as Root complex, in a different board. And the clock is generated from Module and distributed to the AM5706 board with a clock buffer through backplane. (image attached)
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The below images are the probe clock images. It is observed clock of same frequency and voltage while working as well as link down condition.
Then we tried probing the PCIe voltage (which is generated by PMIC TPS659163
And the ripple measured to be 68.6mV.
I tried verifying it with AM5706 datasheet, but no details was provided asn asked tho check PCI Express® Base Specification Revision 3.0. but in that document also I was not able to get the required data.
Please help me solving my issue by
1. Please review the PCIe connection in schematic.
2. Please review the clock and Voltage waveform
3. Please provide acceptable ripple range.
Regards,
Athuljith R