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

Prefer working in your IDE? Install for VS Code

TRUSTED BY HARDWARE TEAMS AT

NORTHBRIDGEVantaySILICOREÆther LabsKESTRELONDA

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.

Describe the module

Plain language, plus optional specs and datasheets in your knowledge base.

Generate RTL + testbench

Per-role models write Verilog or VHDL and a self-checking testbench for your target device.

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

Open app

⌘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

Preserve your coding conventions and generate outputs with device, EDA-tool, and vendor context in the loop, from the web app or right inside VS Code.

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 to build, debug and optimize RTL from the editor	Some offer IDE extensions, but not the complete RTL toolchain loop

“General AI assistants” means broad chat and coding products 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.

Start building

From the blog

All posts

Testbench

How to Write a Self-Checking Testbench in Verilog

Learn how to write a self-checking testbench in Verilog with a practical counter example, automatic output checks, PASS/FAIL reporting, and common verification mistakes to avoid.

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.

ai verilog generator

AI Verilog Generator; A Verilog Code Generator That Verifies What It Builds

Describe a hardware module in plain English and get synthesizable Verilog with a matching, verified testbench. Try SiliCode's AI Verilog generator free.

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 passed

Requirement coverage

4 / 4 mapped

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
covered

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 what the platform does, the HDL knowledge it expects, supported targets, and how usage is priced.

What does SiliCode do?

SiliCode is an AI-assisted RTL development platform for Verilog, SystemVerilog, and VHDL. It helps hardware engineers plan, generate, verify, debug, and optimize RTL designs, including testbench generation, simulation, waveform analysis, and synthesis workflows.

Verilog or VHDL RTL
Self-checking testbench
Simulation and coverage
Target synthesis report

Do I need to know Verilog, SystemVerilog, or VHDL?

No. You can describe your module requirements, interfaces, timing, reset behavior, and functionality in plain language. SiliCode can generate the RTL and verification assets for you. Experienced HDL engineers can also inspect, edit, and refine the generated code directly.

Which FPGA and ASIC targets does SiliCode support?

SiliCode supports Xilinx, Intel, and Lattice FPGA targets, along with generic ASIC synthesis workflows. It can assist with RTL generation, verification, debugging, and optimization across supported hardware-development targets.

How does SiliCode pricing work?

SiliCode offers a Free plan with $4 of one-time usage credit, plus Pro, Max, and Team plans with monthly usage credit. AI usage depends on the models, project context, and tools required for each task, and additional usage credits can be purchased at any time.

Does SiliCode have a VS Code extension?

Yes. The SiliCode VS Code extension lets hardware engineers use AI-assisted RTL workflows without leaving their editor. You can work with existing repositories, generate and verify HDL, debug designs with waveform analysis, and optimize RTL directly from your development environment.

Describe your first module today

Start with welcome credit. Build and verify your first RTL module.

Start building Open app