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Author: Admin | 2025-04-27
If you’re looking to enter the world of ASIC or FPGA verification, then chances are you’ve heard of Universal Verification Methodology (UVM). UVM has become the industry standard for verifying digital designs, and as such, it is a crucial skill set for anyone looking to break into the field.Whether you’re a recent graduate or a seasoned professional, preparing for a UVM interview can be a daunting task. To help you prepare, we’ve put together a list of common UVM interview questions that you’re likely to encounter during the interview process.In this blog post, we’ll go over some of the most frequently asked UVM interview questions and provide tips on how to answer them effectively. We’ll cover topics such as UVM basics, transaction-level modeling (TLM), sequences, and more.So, if you’re ready to take your UVM knowledge to the next level and ace that interview, read on!1. Explain TLM ports and exports in UVM with examples.In the Universal Verification Methodology (UVM), TLM (Transaction Level Modeling) ports and exports are used for communication between different components of the testbench, such as the testbench itself and the DUT (Design Under Test).TLM ports are interfaces that allow the testbench components to initiate transactions to the DUT, while TLM exports are interfaces that allow the DUT to initiate transactions to the testbench.Here is an example to illustrate the use of TLM ports and exports in UVM:Assume that we have a testbench component called “driver” that generates stimulus for the DUT and a testbench component called “monitor” that monitors the DUT’s behavior. We want to use TLM ports and exports to allow communication between the driver and the DUT, and between the DUT and the monitor.First, we define a TLM port in the driver component:class driver extends uvm_driver #(transaction); // Define a TLM port for the driver `uvm_analysis_port #(transaction) analysis_port; ...endclassThis TLM port is used to send transactions from the driver to the DUT.Next, we define a TLM export in the DUT:class dut extends uvm_component; // Define a TLM export for the DUT `uvm_analysis_export #(transaction) analysis_export; ...endclassThis TLM export is used to send transactions from the DUT
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