Why are pins reported as stuck at 1 when I perform Boundary Scan Testing on SOC Devices?

Description

When performing Boundary Scan Testing on Cyclone® V SOC and Arria® V  SOC Hard Processor Systems (HPS), the HPS must be held in reset.

Resolution

This requirement is scheduled to be included starting with the release 15.1 of the Cyclone® V SOC and Arria® V SOC Handbooks.