Shift Registers SRL-Based Implementation - 2023.1 English

Vivado Design Suite User Guide: Synthesis (UG901)

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2023.1 English

Vivado synthesis implements inferred Shift Registers on SRL-type resources such as:

  • SRL16E
  • SRLC32E

Depending on the length of the Shift Register, Vivado synthesis does one of the following:

  • Implements it on a single SRL-type primitive
  • Takes advantage of the cascading capability of SRLC-type primitives
  • Attempts to take advantage of this cascading capability if the rest of the design uses some intermediate positions of the Shift Register