VLSI/FPGA Design P4: STA && DC Synthesis

Analyze setup and hold timing for synchronous paths driven by the same clock, compute data arrival and data required times, account for clock latency and skew, and verify timing safety.

Analyze setup and hold timing for a tff with start and end clocks driven by a clock divider, computing data arrival and required times to determine worst margins.

Learn to constrain a design with sta commands, define ideal and propagated clocks, and generate clocks with create_clock and create_generated_clock, setting latency, transition time, and root paths.

Use set_false_path to disable timing checks between clocks A and B. For a single path, define the start and end pins, and refine with dash through or dash from options.

Set input delay constrains timing from primary inputs to the DF inside the chip relative to the clock, enabling setup and hold checks with maximum and minimum outer logic delays.

Discover how static timing analysis uses clock creation to set up and hold margins, and how set clock groups, set false path, and multi-cycle path adjust launch and capture.

Use set_max_delay and set_min_delay commands in sta to override default margins, specify delay values between launch and capture edges, account for clock latency, and analyze behavior with negative delays.

Explore how to set input transition times and loading capacitance with set_input_transition and set_load, differentiate ports from pins, and perform timing analysis from primary inputs to outputs.

Constrain asynchronous clock domain crossings with maximum delay, clock latency, and metastability margins, addressing gray code FIFOs and multi-bit CDC data paths.

Explore on chip variation (ocv) in timing analysis, using sta models and pvt corners to evaluate setup and hold timing, including cp r and variation models.

Deepen your understanding of static timing analysis by practicing with sta tools, examining setup and hold checks, and learning to set timing constraints and perform timing signoff.