We are working to boot up a custom board designed around the XCZU3EG processor and we are seeing some strange behavior from the PL and PS SYSMON voltage measurments. For example:
Same 1.8V supply powers six supplies but they read different voltages:
Another example would be VCCBRAM is being supplied 0.85V according to regulator and DVM measurement but shows
Also VCCO_PSIO1 is being powered with 3.3V but showing
Another 0.85V supply powers these two:
Our power management scheme is identical to the Avnet Ultrazed SOM and it appears to be measuring "more correctly" than ours but still has a few of these anomolies.
Suggestions on something we may be doing wrong in the setup/configuration? We have been unable to get the Zynq to boot and started with the power analysis first.