Generate a Verilog Testbench From Your Module Specification
Describe one RTL module and generate Verilog or SystemVerilog plus a matching testbench. Enable automated verification, review results, and export your artifacts with SiliCode.
Requirement-driven RTL development
From requirements to verified RTL.
Describe a hardware module in plain language. SiliCode writes the Verilog or VHDL, generates a self-checking testbench, runs simulation, and reports synthesis; verified at every step, not just generated.
Try it; describe a module
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Before. Meet. After SiliCode.
See how SiliCode turns a fragmented FPGA and ASIC module-development process into one connected prompt-to-tool-checked-RTL workflow.
- 01 · Before SiliCode
RTL development is fragmented.
Engineers switch between AI chat, HDL editors, hand-built testbenches, simulators, coverage tools, and synthesis software; re-entering context and debugging every handoff.
- tool switching
- manual testbenches
- fragmented feedback
- 02 · Meet SiliCode
One prompt-to-RTL workflow.
Describe a module in plain language. SiliCode generates Verilog or VHDL, creates a self-checking testbench, runs simulation with coverage, and produces a synthesis report for the selected target.
- Verilog / VHDL
- simulation + coverage
- target synthesis
- 03 · After SiliCode
Review RTL with tool evidence.
Inspect the generated RTL beside its self-checking tests, simulation results, coverage data, and synthesis report; then refine the module using real tool feedback.
- review-ready RTL
- verification evidence
- synthesis insight
Everything the flow needs, in one loop
Retrieval, generation, and verification working together; not a chat box bolted onto a compiler.
Agent & Plan modes
Run tools autonomously, or review a step-by-step plan before anything executes.
Web & Exa search
Live web results and semantic search over datasheets and papers.
IP Core Library
Reuse verified cores from the vendor IP catalog.
Knowledge Base (RAG)
Ground generation in your uploaded specs and PDFs.
Auto-Verify & Reflection
A test plan, golden model, and coverage on every module; the model critiques and iterates until checks pass.
VerilogVHDL
Verilog, VHDL & any target
One prompt, both languages, and synthesis for Xilinx, Lattice, Intel & ASIC flows.
Describe. Generate. Verify.
One loop from a plain-language spec to synthesizable, verified RTL.
01
Describe the module
Plain language, plus optional specs and datasheets in your knowledge base.
02
Generate RTL + testbench
Per-role models write Verilog or VHDL and a self-checking testbench for your target device.
03
Verify & synthesize
Simulation, coverage, and synthesis reporting; Reflection iterates until it's clean.
Pick the right model for every role
Planner, Generator, and Verifier can each run a different model. Optimize for cost, speed, or rigor per stage.
- Verilog and VHDL output
- Xilinx, Lattice, Intel & ASIC flows
- Credits-based; pay for what you run
Si
⌘K
From prompt to verified RTL; not just another code answer
General AI assistants can draft HDL. SiliCode is built for the complete single-module hardware workflow: clarify the design, generate synthesizable RTL, run verification and synthesis, then refine the result using real tool feedback.
Hardware-native from the first question
SiliCode clarifies interfaces, timing, reset behavior, and structure before RTL generation, reducing assumptions that create rework later.
Verified by tools, not confidence
The workflow generates a self-checking testbench, runs simulation and synthesis, reads the results, and uses failures to guide the next iteration.
Built around the engineer's workflow
Work in VS Code, preserve your coding conventions, and generate outputs with device, EDA-tool, and vendor context in the loop.
Workflow comparison
SiliCode vs. general AI assistants
The difference is not access to an LLM. It is the hardware-specific workflow wrapped around it; from pre-RTL planning to verified, synthesis-informed iteration.
| Capability | SiliCode | General AI assistants |
|---|---|---|
| Pre-RTL planning | Clarifies module structure and requirements before coding | Depends on prompt detail and manual follow-up |
| Synthesis-ready HDL | Designed to produce synthesizable Verilog or VHDL | May mix synthesizable RTL with abstract or unsupported constructs |
| EDA tool feedback | Parses simulation and synthesis output directly | Usually requires engineers to copy tool logs back into chat |
| Verification loop | Creates tests, runs them, and iterates on failures | Can suggest tests, but execution is normally manual |
| Resource estimates | Uses synthesis-driven allocation and reports | Estimates remain ungrounded without a synthesis tool |
| HDL knowledge grounding | Grounded in 500k+ vetted HDL sources | Broad coding knowledge without dedicated HDL retrieval by default |
| Vendor-specific IP | Can use device context and supported vendor IP, including Xilinx IP cores | IP selection and instantiation need manual validation |
| Iterative refinement | Patches RTL using code context and tool results | Self-correction is not grounded in executed hardware tools by default |
| Coding conventions | Applies the user's HDL style and conventions | Requires conventions to be restated and checked |
| VS Code workflow | Dedicated extension for the full single-module flow | Some offer IDE extensions, but not the complete RTL toolchain loop |
“General AI assistants” refers to products such as ChatGPT, Claude, Gemini, and Perplexity used in their standard workflow. Capabilities may vary by plan, extension, and custom integration.
Bring a module specification. Leave with evidence.
Generate RTL, a self-checking testbench, simulation results, coverage, and a synthesis report in one connected workflow.
Do not trust the code. Inspect the evidence.
Make “verified” concrete. Show engineers the requirements, executable checks, tool results and synthesis evidence behind each generated module.
packet_counter / verification run #1842
Verification passedRequirement coverage
4 / 4 mapped
- covered
Count one packet when TVALID, TREADY and TLAST are asserted together.
Mapped to test: packet_complete_handshake
- covered
Reset is synchronous and clears the packet counter to zero.
Mapped to test: synchronous_reset
- covered
Backpressure must not increment the counter without TREADY.
Mapped to test: backpressure_no_count
- covered
Counter width is 32 bits and wraps naturally on overflow.
Mapped to test: counter_overflow
Run summary
completed
93%
verification score
- Tests
- 12 / 12 passed
- Requirement mapping
- 4 / 4
- Simulation
- Pass
- Synthesis
- Pass
- Warnings
- 1 reviewed
Frequently asked questions
Quick answers about generated outputs, HDL knowledge, supported targets, usage credits, and the VS Code workflow.
01
What exactly does SiliCode generate?
For each prompt, SiliCode produces a complete single-module workflow: RTL in Verilog or VHDL, a self-checking testbench, a simulation run with coverage results, and a synthesis report for the FPGA device or ASIC target you select.
- Verilog or VHDL RTL
- Self-checking testbench
- Simulation and coverage
- Target synthesis report
02
Do I need to know HDL?
No. Describe the module's inputs, outputs, timing, reset behavior, and function in plain language. SiliCode generates the HDL and verification assets. If you know Verilog or VHDL, you can inspect and edit the generated code directly.
03
Which devices are supported?
SiliCode supports Xilinx, Lattice, and Intel FPGA families, plus generic ASIC synthesis targets.
04
How does pricing work?
SiliCode uses credit-based pricing. Credits are consumed by the AI model and tool calls used during a run, so usage depends on the workflow rather than a fixed price per module.
05
Is there a VS Code extension?
Yes. The SiliCode sidebar extension for VS Code runs the full single-module workflow; from the prompt through generated RTL, verification, and synthesis results, without leaving the editor.
Describe your first module today
Start on the free tier. Bring your own models. Ship verified RTL.