Table of Contents
What is physical synthesis in VLSI?
Physical synthesis takes these implementation effects into consideration. An early floorplan of the design along with detailed routing estimates helps to provide early data on the previously mentioned physical effects. As a result, physical synthesis provides a convergent design flow that requires far fewer iterations.
What is synthesis in physical design?
Synthesis is the process of transforming your HDL design into a gate-level netlist, given all the specified constraints and optimization settings. Logic synthesis is the process of translating and mapping RTL code written in HDL (such as Verilog or VHDL ) into technology specific gate level representation.
What are the steps in physical design?
The main steps in the ASIC physical design flow are:
- Design Netlist (after synthesis)
- Floorplanning.
- Partitioning.
- Placement.
- Clock-tree Synthesis (CTS)
- Routing.
- Physical Verification.
- Layout Post Processing with Mask Data Generation.
What is Gtech library in VLSI?
GTECH is a Synopsys term for Generic TECHnology. The GTECH circuit is the direct product of Verilog/VHDL analysis & elaboration. In this state the circuit is represented using technology independent boolean gates “equations”. The circuit is then optimized & mapped to a target technology.
What is logic synthesis in VLSI?
Logic synthesis is the process of converting a high-level description of design into an optimized gate-level representation. Logic synthesis uses a standard cell library which have simple cells, such as basic logic gates like and, or, and nor, or macro cells, such as adder, muxes, memory, and flip-flops.
What are the inputs for synthesis in VLSI?
Inputs the pattern through scan input port. Scan shift- Scan enable is set to 1….Design related:
- . v- RTL code.
- SDC- Timing constraints.
- UPF- power intent of the design.
- Scan config- Scan related info like scan chain length, scan IO, which flops are to be considered in the scan chains.
What is floor plan Def in physical aware synthesis?
In Physical aware synthesis, we will provide floor plan DEF as one of the input to the synthesis tool. Floor plan DEF will contains the physical information like placement of macros, placement of input & output ports, die area & placement blockages.
What is physically aware synthesis?
Physically aware synthesis – the ability to bring in physical considerations much earlier in the logic synthesis process – is something that can dramatically improve the design process and significantly shorten the time spent fixing problems.
What is a physical synthesis design flow?
In a physical synthesis design flow, an early floorplan of the design is developed for placement information, along with estimates of routing requirements based on this floorplan. State-of-the-art design flows use the same signoff-quality tools for these early phases. A unified data model that is shared by all tools in the flow makes this possible.
What are the advantages of physical synthesis?
Physical synthesis perform the coarse placement with congestion aware and timing aware optimizations. Along with placement, it does trail route which results into better RC correlation with physical design tools. This helps in achieving better congestion, timing and power at later stages of physical design.