Single-Cycle ovl_value #(severity_level, width, num_values, property_type, msg, coverage_level) (clock, reset, enable, test_expr, vals, disallow, fire) ensures the value of an expression either matches a value in a specified list or does not match any value in the list n-Cycles ovl_width #(severity_level, min_cks, max_cks, property_type, msg ...

Open Verification Library (OVL) is a library of property checkers for digital circuit descriptions written in popular Hardware Description Languages (HDLs). OVL is currently maintained by Accellera.

For AxiPC, you MUST define ASSERT_ON and OVL_ASSERT_ON. The other macros are optional but can affect the results, for example, if you do not define OVL_END_OF_SIMULATION, the end-of-simulation checks are not performed.

In this case study we attempt to annotate a subset of OVL 2.0 checkers using equivalent SVA properties. In doing so, we define the equivalence between checkers, or assertions, based on what input sequences they can detect as failure sequences.

Using design-assisted voltage contrast measurement, the method enables in-line test and monitoring of process induced OVL and CD variation of back-end-of line (BEOL) features with litho-etch-litho-etch (LELE) patterning.

The OVL library of assertion checkers is intended to be used by design, integration, and verification engineers to check for good/bad behavior in simulation, emulation, and formal verification.

The OVL library contains built-in functional coverage points, which are off by default but can be turned on by defining OVL_COVER_ON. It is also possible to control the amount of coverage reported by each OVL instance, by setting the coverage_level parameter.

By using a single well-defined interface, the OVL bridges the gap between the different types of verification, making more advanced verification tools and techniques available for non-expert users. From time to time, it may become necessary to …

Nov 4, 2011 · Key points: - The protocol involves sending packets from a sender to a receiver using request, acknowledgement, start of packet, valid, and end of packet signals. - An OVL monitor checks properties like signal widths, handshake timing, and valid window between start and end of packet.

In the current study, overlay metrology performance on short loop wafers processed with 193 nm lithography for front end (poly to STI active) as well as backend (Via to Cu-single damascene metal) was evaluated.