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[INNOVUS] Performing top level implementation for hierarchal/block IC design ("Bottom Up" approach)

TomBradyVLSI over 3 years ago

I'm currently trying to perform the "bottom up" block design (hierarchal) approach in Innovus.

It is very challenging to understand how to implement the top-level module.

The User guide states the below:

"After block implementation, physical and timing abstract models (ILM/FlexILM) should be
developed for each block-level design that will be used in the top-level implementation. For the
bottom-up approach, create a top-level floorplan where block-level abstracts are referenced in the
top-level design."

Two questions:

1.) How to create ILM and FlexILM for a design?

2.) Anyone know what "top-level floorplan where block-level abstracts are referenced in the top-level design" means?

DimoM over 3 years ago

Hi,

you can create ILMs using the write_ilm command for each block.
There is a RAK about ILMs here: Interface Logic Model (ILM) flow using Innovus Digital Implementation System 20.1 (CUI)

Regarding your second question - once you have your blocks and their abstracts, you need to instantiate them somewhere, i.e. in the top level.
So the user guide tells you that you need to create a floorplan for your top-level design and place the block level abstracts in it.

-Dimo
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henny123 over 3 years ago

Does anyone know the answer to this? heardle
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