Digital VLSI Design and Verification Services

RTL Design and Microarchitecture Development

Our RTL design services convert algorithmic or product specifications into an exact and synthesizable hardware design. The designers develop data streams, control mechanisms, pipelines, the finite state machine, the registers interface, the arbitration algorithm, buffering, interruptions, and error recovery procedures before completing actual production of the RTL.

We develop reusable digital blocks such as:

• Communication and protocol controllers
• DMA engines and data movers
• FIFOs, arbiters, bridges, and interconnect logic
• Memory controllers and register banks
• Sensor and peripheral interfaces
• Digital signal-processing pipelines
• Hardware accelerators
• Security and cryptographic control blocks
• Power, clock, reset, and interrupt controllers
• RISC-V peripherals and custom instruction support
• Packet-processing and industrial-control logic

The RTL is structured for readability, parameterization, predictable synthesis, and verification reuse. We apply explicit clock and reset strategies, avoid unintended latches, review signed and unsigned arithmetic, and consider overflow, underflow, backpressure, and illegal-state recovery.

For projects targeting both FPGA and ASIC implementation, technology-specific elements are isolated behind controlled interfaces. This helps the core logic remain portable while memories, clocking primitives, and physical I/O use platform-appropriate implementations.

ASIC and SoC Design Support

Adequate Infosoft supports digital ASIC and SoC development at block, subsystem, and integration levels. We help teams define IP boundaries, memory maps, address decoding, bus connectivity, interrupt routing, clock structures, reset sequencing, and hardware–software interfaces.

In systems on chip (SoC) based on Arm architecture, one can include logic around interfaces like AXI, AHB, and APB. According to Arm, AMBA consists of several protocols for communication on an integrated circuit.

AXI is designed for high-speed connections, while APB is used for low-bandwidth connections to external devices. In case of AXI and APB, designs are checked in terms of handshakes, bursts processing, order, possible responses, and backpressure.

In addition, RISC-V-based architectures are also supported to include processor incorporation, peripherals design, memory units registration, and so on. According to some architectural specifications, compliance tests are conducted to check compliance of designs.

Digital Verification and UVM Services

Verification should begin while the architecture is being defined, not after RTL completion. Our verification engineers convert the specification into a structured verification plan containing features, scenarios, assertions, coverage goals, negative tests, and completion criteria.

For complex IP and SoC environments, we develop SystemVerilog and UVM testbenches with:

• Interface agents and reusable verification components
• Drivers, monitors, sequencers, and sequences
• Reference models and scoreboards
• Transaction-level models
• Register abstraction models
• Protocol and data-integrity checkers
• Constrained-random stimulus
• Directed corner-case tests
• Error injection and recovery scenarios
• Functional coverage models
• Automated regressions and result reporting

The Universal Verification Methodology has been standardized in accordance with IEEE 1800.2 and is continuously updated and maintained through the Accellera framework. Its component-based architecture allows engineers to develop flexible, scalable and reusable verification environments across various blocks or projects.

In addition, we can create an entirely new verification environment, enhance current testbenches, transfer verification IP content between one simulator and another, or study regressions that have become hard to reproduce or unstable over time.

Assertion-Based and Formal Verification

Simulation has its own merits, however, some important control properties, protocol properties, and safety properties are checked more effectively using assertions and formal methods. SystemVerilog Assertions are written for the interface rules, request-response timings, mutual exclusion, FIFO restrictions, legal changes in state, interrupt conditions, reset properties, and ordering of transactions.

The applications of formal verification include:

• Control-centric RTL
• Access arbitration / control logic
• Deadlock and livelock analysis
• FIFO overflow / underflow prevention
• Protocol conformity
• Register and security policy behavior
• Checking of equivalence
• Analysis of unreachable states
• Initialization / reset property analysis

Properties are connected to specification requirements wherever possible. The results of formal analysis are scrutinized for assumptions, reachability verification, the depth of proof, and coverage based on which a passed property is accepted after considering the proof conditions.

Functional Coverage and Verification Closure

Running thousands of tests does not demonstrate that the important behavior has been exercised. Verification closure requires evidence that the implementation, testbench, assertions, and coverage model collectively address the intended design.

Our coverage process combines:

• Statement, branch, expression, toggle, and FSM coverage
• Functional covergroups and cross coverage
• Assertion coverage
• Requirements traceability
• Regression stability
• Bug discovery and closure trends
• Reviewed coverage exclusions
• Targeted tests for uncovered scenarios

Coverage holes are classified before action. A gap may indicate missing stimulus, unreachable functionality, an incorrect model, disabled configuration, or incomplete RTL. Waivers are documented with technical justification rather than used simply to improve a percentage.

Design and Verification of Low-Power Digital Products

When it comes to semiconductor products that are sensitive to energy consumption, we should be thinking about the architecture stage of the design. We can help in finding clock gating, dead paths of data, memory access patterns, unnecessary switching and requirements for power domains.

Whenever a design is done in terms of IEEE 1801 Unified Power Format, our specialists will assist with defining or verifying power domains, isolation, retention, power switches and power states transition.

The low power verification can include the following:

• Isolation before the turn off
• Restoration of the retained state
• Resetting after the power turn-off
• Outputs from inactive power domain are safe
• Conditions for enabling the clock gating
• Legality of power state sequence
• Counting communications in different power domains

The intent to design the product should comply with RTL, assumptions in the verification process, the behavior in the synthesis process and modes of operation to be used.

CDC, RDC, Lint, and RTL Quality Analysis

Clock-domain crossing and reset-domain crossing failures can evade mundane functionality simulation. We analyze synchronization structures, asynchronous controls, pulse transfer, multi-bit data transfer, reconvergence, fifo design, clock cross-referential, and reset releasing.

Our static quality procedure can include linting, CDC checking, RDC checking, elaboration checking, synthesis hints, and design guidelines verification. Problems are categorized according to real risks., so neglecting warnings could hide a silicon problem, but treating all warnings equally would over-engineer solutions.

We also provide help in modernizing inherited RTL, eliminating unsafe elements, enhancing parameterization, separating combinatorial and sequential logic, standardizing resets, and adding assertions and explanations about behavior.

FPGA Prototyping and Hardware Validation

FPGA prototyping provides an opportunity to validate digital logic with real peripherals, software, and data before an ASIC tape-out or product release. We port synthesizable RTL to suitable AMD/Xilinx, Intel, Lattice, Microchip, or comparable FPGA platforms.

Prototype development can include:

• Clock and reset integration
• FPGA memory and interface adaptation
• Timing constraints
• On-chip logic analyzer integration
• Test firmware and register-access tools
• Hardware–software co-validation
• High-speed data-path evaluation
• Long-duration and stress testing

An FPGA prototype does not reproduce every ASIC characteristic, but it can expose architectural, integration, throughput, software, and real-time interaction problems earlier in the program.

Deliverables for Verification Automation and Engineering

In VLSI development, repeatability is key. This is achieved by creating scripts and continuous-integration processes for various tasks such as compilation, selection of tests, regression testing, management of seeds, log processing, coverage merging, and report generation.

Depending on the clients' needs, the scope of deliverables may encompass:

• High-level and microarchitectural specs
• RTL source code and relevant configuration files
• UVM or module-level testbenches
• Verification plan and requirements matrix
• Assertions and properties
• Regression scripts and testing schedule
• Coverage reports and waiver documents
• Lint, CDC, RDC, and synthesis reports
• FPGAs prototype files
• Integration instructions and register documentation
• Error reports and verification closure documentation

The source code is under version control and the process of passing documentation from one party to another is clearly defined.