What is physical aware synthesis in VLSI?

What is physical aware synthesis in VLSI?

Pioneered by Synopsys, logic synthesis takes as an input a description of a circuit expressed in a high-level language such as Verilog or VHDL. The result is many iterations between logic synthesis and place-and-route to achieve a working design. Physical synthesis takes these implementation effects into consideration.

What is RTL synthesis?

In computer engineering, logic synthesis is a process by which an abstract specification of desired circuit behavior, typically at register transfer level (RTL), is turned into a design implementation in terms of logic gates, typically by a computer program called a synthesis tool.

What is the difference between logic synthesis and physical synthesis?

The logical synthesis optimizes the logic, timing and functionality implementation using minimum gates and DRV. The target of physical synthesis is to achieve the minimum area usage at the required speed for a design. And for logical synthesis is timing with no functionality differences.

What are the inputs for synthesis?

Inputs : RTL, Technology libraries, Constraints (Environment, clocks, IO delays etc.). Outputs : Netlist , SDC, Reports etc. Design Compiler (DC) from Synopsys and RTL Compiler from Cadence are the tools widely used for synthesis. Synthesis is described as translation plus logic optimization plus mapping.

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 synthesis in Verilog?

Synthesis converts Verilog HDL models of hardware down to gate-level implementations automatically and maps these into target technology. Synthesis allows mapping of same HDL description into multiple target technologies without any change in the design.

What is synthesizer Verilog?

How does Verilog synthesis work?

Synthesis is the process of converting a high-level description of design (Verilog/VHDL) 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.

How does logic synthesis work?

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 is synthesis flow?

Synthesis is process of converting RTL (Synthesizable Verilog code) to technology specific gate level netlist (includes nets, sequential and combinational cells and their connectivity).

What is synthesis and simulation?

Simulation is the process of describing the behaviour of the circuit using input signals, output signals and delays. But, synthesis is the process of constructing a physical system from an abstract description using a predefined set of building blocks.

What is STA in VLSI?

Static Timing Analysis (STA) is one of the techniques to verify design in terms of timing. This kind of analysis doesn’t depend on any data or logic inputs, applied at the input pins. The input to an STA tool is the routed netlist, clock definitions (or clock frequency) and external environment definitions.

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 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.

Can the synthesis tool change the pipeline stages itself?

Then the synthesis tool could do optimization such as selecting what kind of adder to use. You tell the synthesis tool what frequency you need to run at, and it will pick the smallest logic that still meets timing. However, the synthesis tool could not change the pipeline stages itself.