VW, STMicro collaborate on automotive SoCs

Together, CARIAD and ST are developing hardware for connectivity, energy management, and over-the-air updates making vehicles fully software-defined, secure, and future-proof.

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 semiconductor foundry TSMC 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. 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," says Murat Aksel, Volkswagen Group’s Board Member for Purchasing. "In this way, we are setting new standards in strategic supply chain management.”

This co-development is a first for CARIAD and ST.

"With the co-development of the system-on-chip with ST ahead of us, we are consistently pursuing our semiconductor strategy. The SoC we are designing will be optimally matched to our software – without compromise. In this way, we can offer our Group's customers the best performance for their cars," says CARIAD CEO Dirk Hilgenberg. "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 new 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 (pictured), 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 and STMicroelectronics have agreed on the key points of the cooperation. The details of the cooperation will now be finalised between the companies and cast into detailed agreements.

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 electronic control units (ECU), substantially reducing complexity and accelerating development. Moreover, the Stellar architecture encourages the integration of numerous functions into individual ECUs.

This significantly reduces the number of ECUs in the car, increasing the cost effectiveness and reliability for the software company.

The collaboration with ST enables CARIAD to further expand its expertise in semiconductors and gain additional experience in their co-development. "This is just the first step," says CARIAD CTO Lynn Longo. "In the future, we also aim to enter into co-development of high-performance semiconductors for complex functions."