STMicroelectronics has introduced a new memory technology called xMemory within its Stellar series of automotive microcontrollers. This innovation aims to simplify the design and software management of modern vehicles, particularly electric and software-defined models.
Traditionally, automotive software platforms required different microcontroller units (MCUs) depending on their memory needs. This approach often led to higher costs and longer development times. The xMemory technology, however, allows carmakers to use a single MCU with scalable memory that can be extended during development or even after the vehicle has been released. This reduces the need for hardware redesigns, simplifies production, and supports over-the-air software updates without requiring hardware replacement.
The xMemory feature will initially be available in the Stellar P6 line, which is designed for electric drivetrain applications. Production is set to begin in 2025.
Luca Rodeschini, a senior executive at STMicroelectronics, explained that the new technology is designed to streamline system architecture, cut down on development time, and support long-term innovation without hardware changes. The embedded Phase Change Memory (PCM) used in these microcontrollers offers several advantages in terms of performance and flexibility over other types of non-volatile memory like RRAM and MRAM.
Industry leaders, including Bosch, as well as analysts from Moor Insights & Strategy, have praised the xMemory technology. They emphasized its ability to create more adaptable platforms that can grow and receive software updates, without the typical costs and delays involved in hardware redesigns.
As automotive software becomes more complex due to the integration of AI, regulatory requirements, and connected services, memory capacity is becoming a major concern. The Stellar platform’s ability to expand memory as needed allows carmakers to address these challenges while keeping production costs manageable.
From a technical perspective, ST’s xMemory is based on 28nm embedded Phase-Change Memory, which offers better memory density and performance efficiency compared to other memory types. These memory cells, fabricated using 18nm and 28nm processes, allow for greater memory integration within the same silicon space.
ST’s broader Stellar MCU lineup is designed to handle a variety of applications in modern vehicles. The Stellar P and G series focus on centralizing electronic control systems across zones and domains, while the Stellar E series is dedicated to power management in electric drivetrains.
STMicroelectronics, a company with 50,000 employees, partners with over 200,000 customers and thousands of suppliers to develop solutions that address global challenges. Their technologies are driving smarter mobility, more efficient energy management, and the advancement of cloud-connected autonomous systems. ST is also committed to achieving carbon neutrality by 2027 and transitioning to 100% renewable electricity for all of its operations.
