What is CRPR in VLSI?

The name “CRPR,” or clock reconvergence pessimism removal, is used in static timing analysis. Based on a worst-case scenario, the static time analysis was created. It employs the slowest launch path and the fastest capture path for setup analysis. The worst case of STA becomes pessimistic if launch and capture follow the same path since fast and slow paths cannot cross at the same time. The STA’s accuracy is constrained by the CRPR.

What is Static Timing Analysis (STA)?

By examining all potential avenues for timing violations, static timing analysis (STA) is a technique for evaluating the timing performance of a design. In STA, a design is divided into timing paths, the signal propagation delay along each path is calculated, and timing restrictions inside the design and at the input/output interface are checked for violations.