STMicroelectronics unveiled the STM32A family of automotive microcontrollers at its STM32 Summit in Silicon Valley, targeting vehicle safety applications from entry-level sensing nodes to ASIL D-capable zonal endpoints.
The STM32A4 handles entry-level functions including sensing, actuation, doors, windows and lighting with LIN and cryptographic support. The STM32A5 manages body and comfort control with up to 4MB of memory and ASIL B safety. The STM32A9 targets zonal endpoints with real-time control, Ethernet connectivity and ASIL D safety. The STM32A9's split-lock core can run at ASIL D or deliver twice the performance at ASIL B. ST did not provide availability dates.
The STM32A family uses the same IP, software concepts and STM32Cube tools as the general-purpose STM32 range, which has nearly 2 million developers and more than 20 billion devices shipped. The automotive versions add vehicle-grade qualification, functional safety and longer product lifecycles.
Arm named ST a lead partner in defining its future Cortex-M roadmap. ST will build Nvidia's Holoscan Sensor Bridge software into STM32Cube. "We believe that this is a $200 billion compute market in the middle of next decade or so," said Drew Henry, Executive Vice President of Arm's Physical AI Business Unit.
Volkswagen chose NXP's S32K5 for its zonal architecture being developed with Rivian. ST's advantage lies in developer familiarity, though STM32A remains a roadmap without availability dates while competitors are already locking in programs for 2027 vehicles.