Assigning an Initial Value to a Register - 2023.1 English

Vivado Design Suite User Guide: Synthesis (UG901)

Document ID
Release Date
2023.1 English

Assign a set/reset (initial) value to a register.

  • Assign the value to the register when the register reset line goes to the appropriate value. See the following coding example.
  • When you assign the initial value to a variable:
    • The value is implemented as a Flip-Flop, the output of which is controlled by a local reset.
    • The value is carried in the Verilog file as an FDP or FDC Flip-Flop.