What is false path?

What is false path?

False path is a very common term used in STA. It refers to a timing path which is not required to be optimized for timing as it will never be required to get captured in a limited time when excited in normal working situation of the chip.

What does Set_false_path mean?

set_false_path is a point-to-point timing exception command. This means. it assists in overriding the default single-cycle timing relationship. for one or more timing paths.

What is multicycle path?

Definition of multicycle paths: By definition, a multi-cycle path is one in which data launched from one flop is allowed (through architecture definition) to take more than one clock cycle to reach to the destination flop.

What is Set_max_delay?

The set_max_delay command is a point-to-point timing exception command; that is, it overrides the default single-cycle timing relationship for. one or more timing paths.

What is false path how it is determined in circuit?

False paths: False paths are those timing arcs in the design where changes in source register (flop) are not required to capture at the destination register. The timing path in these topologies can’t be sensitized by any input vector even if both source and destination flops are using same clock source.

What is false path and multi cycle path?

1: Example of a multi-cycle path. A false path (FP) occurs when there is a traceable path through a design that is never enabled. Either the design itself or the way the design is used ensures that the path will not be exercised.

What is Set_case_analysis?

NAME. set_case_analysis. Specifies that a port or pin is at a constant logic value 1 or. 0, or is considered with a rising or falling transition..

What is Set_disable_timing?

DESCRIPTION. The set_disable_timing command disables timing through the specified. cells, pins, or ports in the current design. Any cell, pin, or port in the current design or its subdesigns can be. disabled.

What is false path multicycle path?

False paths: These are paths in a design that exist but changes in source register are not required to be captured at the destination register within one clock cycle. Multi-Cycle paths: Paths where data is not required to reach the capture flop within one clock cycle.

What is asynchronous path?

Asynchronous path: A path from an input port to an asynchronous set or clear pin of a sequential element. See the following fig for understanding clearly. Timing Path- Asynchronous Path. As you know that the functionality of set/reset pin is independent from the clock edge.

What is Set_output_delay?

The set_output_delay command sets output path delays on output ports. relative to a clock edge. Output ports are assumed to have no output. delay unless specified.