Cadence is the first EDA supplier to offer comprehensive tool confidence level (TCL) compliance in accordance with the ISO 26262 standard. Cadence has achieved TCL1 compliance per independent evaluation by TÜV SÜD for three flows, which covers the full spectrum of semiconductor design and verification: Analog Implementation Design and Verification, Digital Front End Design and Verification, and Digital Implementation and Signoff.
This end-to-end flow-based approval is assessed at the highest confidence level, TCL1, making it easier and faster for automotive integrated circuit developers to achieve their devices ASIL certification. Cadence recognizes the effort and time users must put into documenting their tool flow, and is providing Functional Safety Documentation Kits for each of the flows that have been approved.
The Cadence® flow-based documentation has been reviewed and confirmed to be in accordance with the ISO 26262 standard by TÜV SÜD, an internationally accredited independent testing and conformity assessment company.
The documentation kits are available on Cadence Online Support, and freely available to all Cadence registered users. Each documentation kit consists of three major components:
- Safety Manual for the specific flow
- Tool Confidence Analysis (TCA) documents for each tool in the tool chain
- Compliance Report from TÜV SÜD
This documentation kit fulfills a substantial portion of the evaluation and argumentation for the customer’s tool chain, and can easily be adapted to meet their own variations of the tool chain. This modular approach used by Cadence makes it easier to accommodate virtually all developers, including those with customer-specific tools and enhancements. While the user still has the responsibility to provide assessment documents for each tool in the flow, there is now a defined structure and methodology to do so, making the incremental effort very small by comparison. This approach also has the benefit of easily accommodating new tool versions, or even new tools in the flow. Cadence will provide updates to the documentation kits as needed, but effectively the compliance is version independent and, once completed, applies to future versions as well.
Analog/mixed-signal design, implementation and verification flow: The Cadence Virtuoso® suite of analog tools enables schematic design, simulation, debug, and correct-by-construction layout. The Virtuoso Analog Design Environment (ADE) Verifier, released earlier this year, assists with specification verification management by tracking high-level electrical specifications and the status or their corresponding analog validation tests in a single, easy-to-use cockpit. The analog verification plan can be parceled out to individual engineers and tracked for further project-planning purposes.
Digital implementation and signoff flow: The flow includes high-level synthesis, RTL synthesis, design for test, physical implementation, manufacturing analysis and optimization, test pattern generation, formal verification, extraction, static timing analysis, power estimation and integrity analysis, and physical verification, covering everything needed to implement and signoff a design for manufacturing. The centerpieces of this flow are the Cadence Innovus™ Implementation System and the Cadence Modus™ Test Solution, which provide specialized technologies for functional safety, such as isolation, safety islands, memory and logic BIST, and fault modeling.