Table of Contents
- 1 What is Mmmc in physical design?
- 2 What is scenario in physical design?
- 3 What is Multi Corner Multi Mode?
- 4 What is Mmmc file in VLSI?
- 5 What is functional mode in VLSI?
- 6 What is Corner in VLSI?
- 7 What is OCV and AOCV in VLSI?
- 8 What are timing Derates?
- 9 What is the meaning of MMMC file?
- 10 Why is multi-mode/multi-corner (MMMC) timing analysis important?
What is Mmmc in physical design?
Multi-mode multi-corner (MMMC) analysis refers to performing STA across multiple operating modes, PVT corners and parasitic interconnect corners at the same time.
What is scenario in physical design?
In ICCompiler, we create `scenarios` to specify the different corners and modes the design should operate on. In a `scenario`, you can have constraints which determine the mode of operation, and different libraries(or opertaing conditions) which determine the corners.
What is Mcmm in VLSI?
Multi-corner multi-mode (MCMM) analysis is a technique intended to provide high confidence results for timing and other metrics without performing exhaustive simulation of all possible IC conditions.
What is Multi Corner Multi Mode?
“Multi-corner multi-mode” (MCMM) denotes the ability of a design tool to optimize for all design metrics across all modes and corners concurrently. This is accomplished using a data structure called a virtual timing graph.
What is Mmmc file in VLSI?
Multi Mode Multi corner (MMMC) file during the physical design gives the analysis of the design over varied modes & corners. VLSI design can be modeled in either functional or test mode etc, with each mode at varied process corners.
What are Derates in VLSI?
In OCV a fixed timing derate factor is applied to the delay of all the cells present in design so that in case of process variation affect the delay of any cells during the fabrication, it will not affect the timing requirements and chip will not fail after fabrication.
What is functional mode in VLSI?
This is called test mode and the input is test mode range. While beyond the input range, your design would be operational but you may not get the output in the specified output range. This is called Functional test. So this input range would be wider than the test range.
What is Corner in VLSI?
Significance to digital electronics In Very-Large-Scale Integration (VLSI) integrated circuit microprocessor design and semiconductor fabrication, a process corner represents a three or six sigma variation from nominal doping concentrations (and other parameters) in transistors on a silicon wafer.
What are the modes in VLSI?
High-speed clocks mode.
What is OCV and AOCV in VLSI?
AOCV stands for Advanced OCV and SBOCV stands for Stage Based OCV. To clarify the need for AOCV, consider two cases of single and multiple cells. Single cell in isolation exhibits larger delay variation compared to number of cells in a path. Using one number (as in OCV for all cells) in STA results in pessimism.
What are timing Derates?
Abstract: Derating is a versatile technique supported by all static timing analysis (STA) tools in industry. In essence, it enables designers to modify any delay or slew computation performed by such tools.
How to model the design of a VLSI?
VLSI design can be modeled in either functional or test mode etc, with each mode at varied process corners. We need to ensure that the design is stable across all corners, to be specific in Tech terms PVT Corners (Process, Voltage & Temperature).
What is the meaning of MMMC file?
During the process flow of physical design, (prescribed tool-Cadence, synopsys etc) MMMC file takes all relevant details for obtaining the desired design. Thanks 4 A2A..!! MMMC means multi mode multi corner. We make chips those are supposed to work in different temperature and other environment. This referes to multi corner.
Why is multi-mode/multi-corner (MMMC) timing analysis important?
For today’s designs, multi-mode/multi-corner (MMMC) timing analysis is a must.In this paper we’ll delve more into the details behind the explosion of timing views along with the need to analyze them and, more importantly, optimize timing under all the possible combinations.
What is mcmcmm (multi corner multi-mode)?
MCMM stands for: Multi-Corner Multi-Mode (static timing analysis used in the design of digital ICs) A mode is defined by a set of clocks, supply voltages, timing constraints, and libraries. It can also have annotation data, such as SDF or parasitics files.