Hybrid Memory Cube Memory Model
Packetized stacked-memory links: requests and responses, flow control, retry and vault addressing.
Hybrid Memory Cube memory model
Hybrid Memory Cube stacks DRAM on a logic die and connects it over packetized serial links, used in high-performance computing and networking.
Lumina VIP for Hybrid Memory Cube covers HMC 1.x · 2.x, as published by HMC Consortium. It comes as memory model and synthesizable transactor, built for Lumina, so the same components run in simulation and report their results in one place.
What the Hybrid Memory Cube VIP covers.
Protocol
- Request and response packets, read, write and atomic commands
- Token-based flow control and retry
- Vault and bank addressing, link power states
Checks and error injection
- Link widths and rates from the specification
- CRC errors with link-level retry
- Chained cubes and pass-through routing
What it checks
- Command sequences against every timing parameter
- Initialisation, training and mode-register settings
- Refresh, self-refresh and power-down rules
- Data integrity, ECC and CRC
Memory model capabilities
- Part configurations selected by density, width and speed grade
- Every timing parameter checked, with the violated parameter named in the message
- Sparse storage, so large densities use little host memory
- Backdoor preload, peek, poke and dump of the contents
- Mode registers and power states modelled
- Configurable error injection on read data
Transactor capabilities
- Synthesizable RTL for FPGA prototypes and emulators
- A transaction-level interface, so tests move unchanged from simulation
- Protocol checkers and monitors that run at hardware speed
- Streaming and buffered modes for throughput
Why Lumina VIP.
- Fast Hybrid Memory Cube 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
- The same scenarios run in simulation, on FPGA and on silicon
- 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.
- 01Host controller model
- 02Cube model
- 03Passive monitor
Hybrid Memory Cube products.
Hybrid Memory Cube memory model
Device models that behave like the memory part: commands, modes, refresh and every timing parameter checked.
Includes
- Configurable density, width, speed grade and timing
- Timing and protocol checks on every command
- Mode registers, training and power-down behaviour
- Backdoor access to preload and inspect memory contents
Hybrid Memory Cube synthesizable transactor
Synthesizable models of the protocol for FPGA prototyping and hardware-assisted verification, driven from the same tests as the VIP.
Includes
- Synthesizable RTL for the protocol's roles
- A transaction interface to software or a testbench
- Monitors and checkers that run at hardware speed
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
- Each timing parameter at its minimum
- Initialisation and training sequences
- Refresh and power-down under traffic
- ECC, CRC and parity 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.
- Memory controllers and PHYs
- AI accelerators and GPUs
- Mobile, automotive and server SoCs
Frequently asked questions.
What is Lumina VIP for Hybrid Memory Cube?
Lumina VIP for Hybrid Memory Cube is a set of verification products for designs that use Hybrid Memory Cube: memory model and synthesizable transactor. Packetized stacked-memory links: requests and responses, flow control, retry and vault addressing.
Which Hybrid Memory Cube versions does it support?
HMC 1.x · 2.x, as published by HMC Consortium. If you need another version or option, tell us which one.
Which verification components are included?
Host controller model, Cube model 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. The transactors are synthesizable RTL for FPGA prototyping and hardware-assisted verification.
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: each timing parameter at its minimum, initialisation and training sequences, refresh and power-down under traffic and ECC, CRC and parity 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 Hybrid Memory Cube?
Lumina VIP for Hybrid Memory Cube 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