TMC-20006: Unregistered User-Partition Inputs


Found unregistered input ports in a design or user-partition leading to timing-critical interface paths. When an input port of a block is not directly driving a register, the combinational logic delay from input port to the next synchronous element reduces the available slack. This condition makes interface timing closure dependent upon the instantiation context of the block.


To avoid interface timing path failures, ensure that all partition and design input ports are driving synchronous end-points, such as registers, DSPs, and RAMs.

Figure 1. Unregistered User-Partition Inputs




Plan, Place, Final

Device Family

  • Intel® Stratix® 10
  • Intel® Agilex™
  • Intel® Cyclone® 10 GX
  • Intel® Arria® 10