Use command to instruct timing software to check for hold at desired clock edge

Use command to instruct timing software to check for

This preview shows page 33 - 40 out of 75 pages.

Use command to instruct timing software to check for hold at desired clock-edge ( desired hold ) Example : primetime commands for 3-cycle path Define 3-cycle path for setup calculation set_multicycle_path –setup 3 –from launch/clk –to capture/D Request for checking "hold" 2 cycles earlier than the implied holds set_multicycle_path –hold 2 –from launch/clk –to capture/D Chapter 5: Timing Analysis and Optimization 5-33 clk capture clk launch Desired hold Setup 0 1 2 3 Implied hold
Image of page 33