NGDBuild Support of Multiple Device Architectures

NOTE

Refer to the “VHDL and Verilog Simulation Flow” figure.

NGDBuild processes multiple device architectures with the same core map and place and route software. NGDBuild performs two functions during design implementation.

• NGDBuild stores your design's elements in a single database so that subsequent operations, such as mapping and routing, are performed on the entire design.
  
  
• NGDBuild creates an native generic database (NGD) netlist, which consists of technology-independent primitives common to all FPGAs (SimPrims).
  
  

The MAP program reads this NGD file and creates a native circuit description (NCD) file, a physical description of your design in terms of the target device.

Next, the PAR program places and routes the NCD file. NGDAnno creates an NGA file, a back-annotated NGD file.