USB retimer Verification IP
Retimers on SuperSpeed and USB4 links: link training through the retimer, sideband transactions and the added latency.
USB retimer verification IP
Retimers extend high-speed USB links across longer board traces and cables by recovering and re-sending the signal. They take part in link training and add latency the link must tolerate.
Lumina VIP for USB retimer covers USB 3.2 · USB4, as published by USB-IF. It comes as verification IP, built for Lumina, so the same components run in simulation and report their results in one place.
What the USB retimer VIP covers.
Retimer behaviour
- Link training through one or two retimers
- Sideband transactions and retimer register access
- Latency and skew within the specification limits
Checks and error injection
- USB 3 and USB4 retimer modes
- Low-frequency periodic signalling and link power states passed through
- Retimer-specific training sequences and compliance mode
- Bit errors and lost lock injected on either side
What it checks
- Enumeration, descriptors and every transfer type
- Link and power state machines
- Timing of packets, handshakes and turnarounds
- Error injection and recovery
Verification IP capabilities
- Active and passive agents for every protocol role, set per instance
- Bus widths, timing and optional features set by parameters, and changeable while a test runs
- A sequence library from basic directed traffic to constrained-random stress
- Error injection, static or on the fly, with checks that the expected error was seen
- Protocol checks that run in real time, each tied to a rule of the specification
- Scoreboards that check data end to end
- Throughput, latency and utilisation statistics for each interface
- Callbacks at each stage for your own checks and stimulus
- UVM register model adapters for protocols that carry register access
- Transaction logs and messages linked to the waveform for debug
Why Lumina VIP.
- Fast USB retimer testbench bring-up: connect the agents, pick a test and run
- Every failure names the rule it broke and the transaction that broke it
- Protocol coverage merges with your design coverage in one database
- Readable SystemVerilog and UVM source your team can extend
- Runs natively in Lumina Sim, with no wrappers and no separate compile
- Results structured for engineers and AI agents alike
Verification components.
Each component works on its own or together with the others in one environment, in active or passive mode.
- 01Retimer model
- 02Link partner models
- 03Passive monitor
USB retimer products.
USB retimer verification IP
UVM agents that drive and check a protocol in simulation, in every role the protocol defines.
Includes
- Active and passive UVM agents for each protocol role
- Configurable sequences, from directed to constrained-random
- Protocol checks that flag violations with a spec reference
- Functional coverage of the protocol's features
- Scoreboards and transaction logs readable by people and AI agents
Test suite and coverage.
- Directed tests for each feature of the specification
- Constrained-random tests across configurations and traffic mixes
- Error-injection tests that check how the design recovers
- A functional coverage model mapped to the specification
- Regression lists ready to run in Lumina
Test focus for this protocol family
- Enumeration for every device class in scope
- Each transfer type at each speed
- Link power management entry and exit
- Packet, CRC and timeout errors
What you receive.
- Readable source of every component
- The test suite and its coverage model
- An example environment connected to a sample design
- User guide, integration guide and release notes
- Scripts to run the examples in Lumina
Where it is used.
- PCs, docks and hubs
- Phones and tablets
- Chargers and Type-C controllers
Frequently asked questions.
What is Lumina VIP for USB retimer?
Lumina VIP for USB retimer is a set of verification products for designs that use USB retimer: verification IP. Retimers on SuperSpeed and USB4 links: link training through the retimer, sideband transactions and the added latency.
Which USB retimer versions does it support?
USB 3.2 · USB4, as published by USB-IF. If you need another version or option, tell us which one.
Which verification components are included?
Retimer model, Link partner models and Passive monitor. Each one can be used on its own or together with the others in one environment.
What language and methodology does it use?
The verification IP and models are written in SystemVerilog with UVM, as readable source your team can extend.
How does it work with Lumina?
It runs in Lumina Sim beside your RTL. Protocol coverage merges into the same database as your own coverage, and every violation names the rule it broke and the transaction that broke it.
Which tests come with it?
Directed tests for each feature of the specification. Constrained-random tests across configurations and traffic mixes. Error-injection tests that check how the design recovers. A functional coverage model mapped to the specification. Regression lists ready to run in Lumina. For this protocol family the tests focus on: enumeration for every device class in scope, each transfer type at each speed, link power management entry and exit and packet, CRC and timeout errors.
What is delivered?
Readable source of every component. The test suite and its coverage model. An example environment connected to a sample design. User guide, integration guide and release notes. Scripts to run the examples in Lumina.
How can I get Lumina VIP for USB retimer?
Lumina VIP for USB retimer is in preview. Email hello@lumeeslab.com with the versions and product types you need.
Need VIP for a protocol?
Tell us which protocols and versions you need. We also add protocols on request.
Lumina VIP
hello@lumeeslab.comHelpful to include
- The protocols and versions
- Product types: VIP, assertion IP, memory model, transactor
- Your schedule