2.5 Dedicated Differential I/O Driving the Reference Clock of the CCC May Cause a Functional Failure Due to a Software Bug

If the design has a dedicated differential I/O pair driving the reference clock of the CCC, the input clock may not propagate to CCC due to a software bug, and the device fails during silicon testing. There are several options to drive the ref clock of the CCC. One of the options is to drive from “Dedicated Input PAD x” (x = 0 to 3); this uses hardwired routing. In this option, choose single-ended I/O or differential I/O as the ref clock. This Errata exists when you choose the differential I/O option (dedicated differential I/O is used as CCC reference clock input).

This Errata cannot be detected in any functional simulation, and can only be detected in silicon testing.

Solution:

The Errata is fixed in the Libero SoC 11.1 SP3. Migrate the design to Libero SoC 11.1 SP3 or a newer version, and re-run Compile and Layout.