STMicroelectronics and WHIS show mixed-criticality software on Stellar G3 for software-defined vehicles

STMicroelectronics and WITTENSTEIN high integrity systems (WHIS) are demonstrating at Electronica 2026 how automotive developers can run mixed-criticality applications on ST's Stellar G3 platform using SAFERTOS, WHIS's safety-critical real-time operating system (RTOS). SAFERTOS is pre-certified to ISO 26262.

The demonstration runs on the SR6G3 microcontroller and shows real-time embedded applications that combine control, visualisation and user interaction, with safety supervision and application partitioning. Applications with different safety requirements can be isolated on the same hardware while keeping predictable, deterministic behaviour.

The work responds to the shift in vehicle design from dozens of distributed electronic control units towards zonal controllers and centralised compute platforms. That can reduce hardware complexity and speed up software updates, but it raises the pressure to balance innovation, scalability and performance with strict functional safety requirements.

SAFERTOS is supplied with certification evidence through a Design Assurance Pack, with safety artefacts, documentation and integration guidance intended to reduce certification effort and speed deployment of safety-related applications.

Andrew Longhurst, Managing Director of WITTENSTEIN high integrity systems, said: "As SDV architectures become more common, developers need the flexibility to choose the right software architecture for each function while maintaining confidence in functional safety."

The demonstration is on the STMicroelectronics stand (C3.100-102) at Electronica 2026 from 10 to 13 November.

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