Static timing analysis for nanometer designs by bhasker j. A2a static timing analysis is one of the most interesting topics in vlsi. Precharge logic is used by a variety of industries in applications where processor speed is the primary goal, such as vlsi very large systems integration applications. There are only two cases for setup and hold slack analysis. Static timing analysis interview questions with answers. Timing of the vlsi circuits, verified by sta static timing analysis. Sta breaks a design down into timing paths, calculates the signal propagation delay along each path, and checks for violations of timing constraints inside the design and at the inputoutput interface. What are some of the best resources to learn static timing analysis. Static analysis 15 static analysis definition static program analysis is the systematic examination of an abstraction of a programs state space metal interrupt analysis abstraction 2 states.
A fast approach for static timing analysis covering all pvt corners. This kind of analysis doesnt depend on any data or logic inputs, applied at the input pins. Static timing analysis timing constraints path delay between two flipflops must be less than one clock period once clock specification is fixed, timing constraint is fixed between all flip flops 5. Prices and other details are subject to change without notice. The book covers topics such as cell timing and power modeling. It is based on the propagation of signals through the circuit, where each signal is. My name is karen buskers, and im looking into vlsi industry as a principal engineer for more than ten years. Dynamic timing simulation requires vectors, a logic simulator and timing information. Static timing analysis for nanometer designs author j. A timing path is a combination of all the timing arcs from a start point to an end point.
Timing path the wire connection net between any two design nodes, such as the output of a register to the input of another register. One of the static timing analysis interview questions with answers pdf download 112 pages. Static timing analysis for nanometer designs springer. Static timing analysis once boundary condition is defined, all four types of paths can be converted into the 1st type of path 9. Bhasker rakesh chadha esilicon corporation esilicon corporation a j isbn 9780387938196 eisbn 9780387938202 library of congress control number. Static timing analysis things get a little more complex when the input transition time is not one of the values given in the table e. The sta will validate whether the design could operate at the rated clock frequency, without any timing violations. Download it once and read it on your kindle device, pc, phones or tablets. By default, most static timing analysis tools perform single cycle based analysis. For timing analysis, the startpoint to endpoint combinations are. The static timing analysis topics covered start from verification of.
Dclkn 3ns gate 10 2ns ff hold 1ns clock uncertainty dclku 1ns net 2ns clock 14ns input delay da, db, dc 1ns. Pdf static timing analysis for nanometer designs pdf. Static timing analysis for nanometer designs a practical approach j. Statistical static timing analysis ssta, which analyzes circuit delays statistically by. Buy this book isbn 9780387938202 digitally watermarked, drmfree included format. There are huge numbers of logic paths inside a chip of complex design. Dfmdfy design for manufacturability and yield influence of process variations in. Use features like bookmarks, note taking and highlighting while reading static timing analysis for nanometer designs.
The timing analyzer measures the timing performance for all timing paths identified in your design. A blockbased approach allows incremental, embedded static timing analysis and therefore enables timing driven flows in logic. We have come across many design engineers trying to learn the background and various aspects of static timing analysis. And today i will be covering some of the basic interview questions that are asked in a static timing analysis interview. In practice, onchip variations are considered less severe than chip tochip variations and are handled using derates, or margins, in static timing analysis sta. Timing analyzer requires this netlist to perform timing analysis. Static timing analysis sta is a simulation method of computing the expected timing of a digital circuit without requiring a simulation of the full circuit highperformance integrated circuits have traditionally been characterized by the clock frequency at which they operate. However, most methods basically follow though perhaps. Static timing analysis for nanometer designs ebook free download pdf timing, timing, timing. Static timing analysis is a technique for estimating the delay of a design without electrical simulation. Performance analysis general terms algorithms, performance, reliabiliry 1 introduction and overview of approach static timing analysis has become the primary tool for perfor mance verification in the semiconductor industry. Standard cell library and timing models for combinational and sequential cells. Static timing analysis for nanometer designs springerlink.
For a better and more detailed explanation, do yourself a favor and go see the original. The topics then extend to complex nanometer designs with concepts such as modeling of onchip variations, clock gating, halfcycle and multicycle paths, false. Sta example timing model 10 gate 01 3ns ff setup 1ns clock n. Static timing analysis for nanometer designs a practical. Vsd embeddeduvmopen source verification and emulation vsd clock tree synthesis part 2. Edptc timing closure for edp ta timing analysis sta static timing analysis ssta statistical static timing analysis. In sta, a combinational logic network is represented as a. Using temporal and functional information in crosstalk aware. From graph partitioning to timing closure chapter 8. Slack analysis is used to identify timing critical paths in a design by the static timing analysis tool critical path any logical path in the design that violates the timing constraints path with a negative slack 9. So, it validates the design for desired frequency of operation, without checking the functionality of the design. Static timing analysis tools usually do not know the exact number of cycles required for a signal to reach its destination.
For each of these topics, the book provides a theoretical background along with detailed examples to. Timing path a timing path is a pointtopoint path in a design. Statistical static timing analysis technology fujitsu. Stastatic timing analysissetup and hold by vlsi universe. Sources of timing variations channel length dopant atom count oxide thickness dielectric thickness vcc temperature influence performance yield prediction optimization design convergence management traditional corner based analysis suboptimum 0 100 200 300 0 0. Static timing analysis for nanometer designs by bhasker, j.
Having all of them in a single course makes it bulky. This chapter will overview the basics of static timing analysis. Static timing analysis of gasp by prasad joshi a thesis. Static timing analysis comprises broadly for timing checks, constraints and library. Other delay budgeting techniques are described in 8. It locates the worstcase delay of the circuit over all possible input combinations. The book explores the three paradigms, how to analyze or measure power. It is widely adopted in industry for timing verification and optimization. This is because the power dissipation especially the leakage or static power. The book has originated from many years of our working in the area of timing verification for complex nanometer designs. Among the most important of these phases are the design, optimization, and testing. Static timing analysis sta is one of the techniques to verify design in terms of timing. Our site has the following ebook pdf static timing analysis for nanometer designs author j bhasker jul 20 available for free pdf download.
Patrick lee questions with static timing analysis interview questions with answers pdf. Vsd pipelining riscv with transactionlevel verilog. Dynamic timing analysis static timing analysis dynamic timing analysis traditionally, a dynamic simulator has been used to verify the functionality and timing of an entire design or blocks within the design. Its the sta engineer who owns the timing closure of blocksoc. Using temporal and functional information in crosstalk. Interview question on static timing analysis retiming. This book addresses the timing verification using static timing analysis for nanometer designs. Primary input or inout to register and register to register. Static timing analysis what is the longest delay in my circuit. So we decided to have it in 3 parts and this is part i essential timing checks. So, coming to the question what are some of the best resources to l. Three steps in static timing analysis circuit is broken down into sets of timing paths delay of each path is calculated path delays are checked to see if timing constraints have been met 5. The input to an sta tool is the routed netlist, clock definitions or clock frequency and external environment definitions. This book provides a blend of underlying theoretical background and indepth coverage of timing verification using static timing analysis.
One of the most useful results from timing analysis is the determination if a specific design will operate at a desired speed. Recently, several papers have been published 1,10,25,27 addressing various aspects of static timing analysis in the presence of crosstalk delay effects. A practical approach is a reference for both beginners as well as professionals working in the area of static timing analysis for semiconductors. Measuring the ability of a circuit to operate at the specified speed requires an ability to measure, during the. For each of these topics, the book provides a theoretical background as well as detailed examples to elaborate the concepts. Full chip static timing analysis is usually performed using efficient blockbased techniques. This course will give an eagles eye to every timing check that is being performed in current industries for signoff. Read static timing analysis for nanometer designs pdf on our digital library. View sta nano meter from crickrt 11 at auroras engineering college. Static timing analysis complete, exhaustive method of verifying timing of the entire design.
The book covers topics just like cell timing and power modeling. Pdf ebooks can be used on all reading devices immediate ebook. Static timing analysis sta static timing analysis sta is one of the techniques to verify design in terms of timing. Static timing analysis or why and how to calculate slack. Static timing analysis interview questions kiran bhaskar. The basic ssta method defines the random variations of the delay as random variables and calculates the probability density function pdf of circuit delay. This section is heavily based on rob rutenbarsfrom logic to layout, lecture 12 from 20. Static timing analysis sta is critical to the measurement and optimization of the circuit performance before its manufacture. You may find ebook pdf static timing analysis for nanometer designs author j bhasker jul 20 document other than just manuals as we also make available many user guides, specifications documents. Static timing analysis for nanometer designs ebook library. Stastatic timing analysissetup and hold vlsi universe.
Static timing analysis for nanometer designs media control. What are some of the best resources to learn static timing. Timing libraries provide the delays of the cells and interconnects nets the sta tool uses the delays of the nets and cells to calculate the path delays an. Static timing analysis is a method for determining if a circuit meets timing constraints without having to simulate. Statistical static timing analysis ssta ulf schlichtmann institute of electronic design automation technische universitaet muenchen munich, germany special session. Timing analysis is an essential step in all phases of development of integrated circuits. That is the main concern of a digital designer charged with designing a semiconductor chip. Thereafter, we discuss how a static timing analysis tool, synopsys primetime, was used to verify these relative timing constraints as well as perform setup and hold checks on a substantial industry design. Dfmdfy design for manufacturability and yield influence of process variations in digital, analog and mixedsignal circuit design.
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