CARIAD and ST to develop chip for software-defined vehicles

STMicroelectronics Pty Ltd

Monday, 25 July, 2022

CARIAD and ST to develop chip for software-defined vehicles

CARIAD, the software unit of Volkswagen Group, and STMicroelectronics (ST), a global semiconductor company, have announced their joint development of an automotive system-on-chip (SoC).

Together, CARIAD and ST are developing tailored hardware for connectivity, energy management and over-the-air updates making vehicles fully software-defined, secure and futureproof. The planned cooperation targets the new generation of Volkswagen Group vehicles that will be based on the unified and scalable software platform. At the same time, the parties are moving to agree that TSMC, the dedicated semiconductor foundry company, will manufacture the SoC wafers for ST. With this move, CARIAD aims to secure the chip supply for the Volkswagen Group’s cars years in advance.

As part of its semiconductor strategy, CARIAD will enter into direct relationships with semiconductor suppliers at the Tier 2 and Tier 3 level for the Volkswagen Group for the first time. In the future, CARIAD plans to direct Tier 1 suppliers of the Group to use only the SoC co-developed with ST and ST’s standard Stellar microcontroller for CARIAD’s zone architecture.

“We are about to launch a groundbreaking new cooperation model for the Volkswagen Group,” said Murat Aksel, Volkswagen Group’s Board Member for Purchasing. “With the planned direct cooperation with ST and TSMC, we are actively shaping our entire semiconductor supply chain. We’re ensuring the production of the exact chips we need for our cars and securing the supply of critical microchips for years to come. In this way, we are setting new standards in strategic supply chain management.”

“The SoC we are designing will be optimally matched to our software — without compromise,” added CARIAD CEO Dirk Hilgenberg. “In this way, we can offer our Group’s customers the best performance for their cars.

“The use of a single, optimised architecture in all Volkswagen electronic control units will give us an enormous boost for the efficient development of our software platform. This efficiency will allow all electronic control unit (ECU) devices — from microcontrollers to SoCs — to run on a common basic software in the future.”

The SoC aims to complement ST’s high-performance Stellar microcontroller family by extending its power-efficient real-time capabilities to service-oriented environments. CARIAD is contributing its specific target requirements and functionalities for the Volkswagen Group vehicles and will help extend the architecture of ST’s 32-bit Stellar Automotive microcontroller.

“ST designed its Stellar architecture specifically to facilitate the transition to software-defined vehicles and CARIAD’s decision to work with ST to fit the requirements and functionalities of the Volkswagen Group’s next-generation vehicles highlights the success of our approach,” said Marco Monti, President of ST’s Automotive and Discrete Products Group. “The combination of CARIAD’s software competences with ST’s design expertise and innovative Stellar automotive architecture will position the Volkswagen Group to deliver best-in-class, connected, software-defined vehicles.”

CARIAD will include both the jointly developed SoCs based on Stellar and the standard Stellar microcontroller in its new AU1 processor family. Its range offers CARIAD flexible scaling for various applications in the car to meet the needs of all Volkswagen Group brands. The chips are being designed for all applications in the areas of networking, drivetrain, energy management and comfort electronics — in zone controllers or in servers in VW’s operating system, VW.OS.

Building on Stellar’s unique attributes, the entire AU1 processor family will be powerful enough to easily map future function extensions via over-the-air updates. Using a common device architecture will enable CARIAD experts to develop only one basic software for all ECUs, reducing complexity and accelerating development. Moreover, the Stellar architecture encourages the integration of numerous functions into individual ECUs. This reduces the number of ECUs in the car, increasing the cost-effectiveness for the software company.

In the future, CARIAD aims to enter into co-development of high-performance semiconductors for complex functions.

Image credit: ©stock.adobe.com/au/Tobias Arhelger

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