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Timing Analysis in RTL Hardware Design

Explore timing analysis of synchronous circuits, clock distribution networks, and clock skew issues in FPGA and ASIC design using VHDL. Learn about the impact of setup time violations on flip-flop behavior and downstream circuitry, metastable patterns, and clock tree layout optimization.

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Timing Analysis in RTL Hardware Design

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  1. ECE 545 Lecture 8 Timing Analysis

  2. Required reading • P. Chu, RTL Hardware Design using VHDL • Chapter 8.6 Timing Analysis of a Synchronous • Sequential Circuit • Chapter 16.1 Overview of a Clock Distribution • Network • Chapter 16.2 Timing Analysis with Clock Skew

  3. Hold & Setup Time Metastability ECE 448 – FPGA and ASIC Design with VHDL

  4. Violation of Hold or Setup Time

  5. Response of a Flip-Flop to Timing Violation There exists a third and unstable point of equilibrium between the two stable states representing the binary states 0 and 1 respectively.

  6. Points of Equilibrium in Flip-Flops and Latches

  7. Patterns of Metastable Behavior

  8. Response to Timing Violation

  9. Impact on Downstream Circuitry

  10. Clock Skew ECE 448 – FPGA and ASIC Design with VHDL

  11. Clock Skew

  12. Clock Skew Map for a Cell Processor

  13. Incorrect Clock Tree Layout – Narrow Meander

  14. Optimized Clock Tree Layout – H Tree

  15. Clock Skew - Summary

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