• STMicroelectronics has introduced theStellar P3E, the first automotive MCU with an embedded Neural-ART AI accelerator, designed to simplify X-in-1 Electronic Control Units (ECUs) by consolidating powertrain functions like the inverter, on-board charger (OBC), and DC-DC converter into a single module. • The MCU enables smart sensing, predictive maintenance, and virtual sensor applications without the cost and complexity of a separate SoC. • The microcontroller features four 500 MHz Arm Cortex-R52+ cores with 19.5 MB of xMemory, which is based on phase-change memory (PCM), offering roughly twice the density of embedded flash. • The chip integrates multiple ADC channels for precise sensing, high-resolution PWM down to 102 ps for fine motor control, and 10 timer modules for deterministic real-time operation. • Connectivity options include Gigabit Ethernet and CAN-XL, for high-speed, low-latency in-vehicle communication. • Stellar P3E (SR6P3EC4/SR6P3EC6) specifications: MCU - SR6P3EC4 / SR6P3EC6CPU Cores - 4xArm Cortex‑R52+ coresat up to 500 MHz; Can be set as 4 cores (2 in lockstep) or 3 cores (all in lockstep)Single precision floating-point unit (FPU)Hardware-based virtualization architecture for software isolation in SDV applications16KB I-cache / 8KB D-cache per core128KB TCM per coreAI accelerator - Neural-ART proprietary NPU (INT8)1x Arm Cortex-M4 multipurpose core running at 200 MHz in lockstep for low-power modes and COM acceleration CPU Cores - 4xArm Cortex‑R52+ coresat up to 500 MHz; Can be set as 4 cores (2 in lockstep) or 3 cores (all in lockstep)Single precision floating-point unit (FPU)Hardware-based virtualization architecture for software isolation in SDV applications16KB I-cache / 8KB D-cache per core128KB TCM per core Single precision floating-point unit (FPU) Hardware-based virtualization architecture for software isolation in SDV applications 16KB I-cache / 8KB D-cache per core 128KB TCM per core AI accelerator - Neural-ART proprietary NPU (INT8) 1x Arm Cortex-

Article Summaries:

  • STMicroelectronics has unveiled the Stellar P3E, the first automotive microcontroller unit (MCU) that embeds a Neural‑ART AI accelerator. The quad‑core Arm Cortex‑R52+ design runs at up to 500 MHz and can operate in lock‑step for safety‑critical applications, while a low‑power Cortex‑M4 core supports standby modes. With 19.5 MB of PCM‑based xMemory, the chip consolidates powertrain functions-such as inverter, on‑board charger and DC‑DC converter-into a single module, enabling smart sensing, predictive maintenance and virtual‑sensor use. The MCU offers high‑speed connectivity (Gigabit Ethernet, CAN‑XL), extensive ADC and timer peripherals, and ISO 26262 ASIL‑D and ISO/SAE 21434 security compliance.

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