Building a Better Virtual Sequence with Portable Stimulus

By Mentor Graphics Corp.
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When using the Universal Verification Methodology (UVM), sequences are the primary mechanism by which stimulus is generated in the testbench. Sequences come in two flavors: simple sequences for driving a single interface and virtual sequences that control more complex behavior. Simple sequences tend to work with a single sequence item, while virtual sequences often spawn off multiple sub-sequences to accomplish their intended task. Good virtual sequences are challenging to create, and even more challenging to reuse in a way not explicitly intended by the original author. This article will walk through an example showing how a portable stimulus applies to create scenarios for a DMA engine. Read More



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