LUT with FlipFlop Example

An example of the classical LUT with FlipFlop pair.

This is shown in Figure 28 of the Architecture Reference section of the Verilog to Routing Documentation and reproduced below;

Figure 28 from Verilog to Routing Documentation Fig. 28 Pack Pattern Example.

Blackbox detection

  • [ ] model of the leaf pb_type is generated
  • [ ] leaf pb_type XML is generated
  • [ ] all dependency models and pb_types are included in the output files

Carry chain inference

  • [ ] pack_pattern inference - pack_patterns defined on wires with pack attributes should be propagated to pb_type XMLs