ST starts shipments of its Stellar microcontrollers to selected customers

June 16, 2021 // By Christoph Hammerschmidt
ST starts shipments of its Stellar microcontrollers to selected customers
STMicroelectronics has begun shipping the Stellar SR6 series of automotive microcontrollers (MCUs). The Stellar series will be used in domain and zone controller platforms and will enable the virtualisation of ECU functions.

With the Stellar SR6 MCU family, which is scheduled to go into production in 2024, ST is primarily targeting developers in the vehicle body and powertrain sectors. The concept of domain or zone controllers enables more design flexibility, the shift of numerous functions from the software to the hardware level and higher system reliability. Incidentally, it simplifies the wiring loom in the vehicle.

The Stellar SR6 MCUs are implemented in ST's FD-SOI process technology, which, according to the manufacturer, is characterised by excellent SER (Soft Error Rate) values - one of the prerequisites for ensuring the required high system reliability and availability for Functional Safety in applications according to ISO 26262 up to ASIL-D.

The building blocks provide hardware-based virtualisation so that multiple software applications can co-exist while maintaining performance and real-time determinism. At the same time, flexibility for designers is increased as multiple independent applications or virtual ECUs (Electronic Control Units) can run on the same physical microcontroller.

The first Stellar SR6 P and G series MCUs are equipped with up to 20 Mbytes of robust phase-change memory (PCM), which ensures a high level of performance and data preservation and meets AEC-Q100 Grade 0 requirements. The so-called dual-image storage of the Stellar series also allows efficient over-the-air reprogramming (OTA) with a significant reduction in memory requirements. This is made possible by the possibility of configuring a PCM cell structure with the aim of doubling the memory size during OTA updates up to 2 x 20 MByte. Access times are also shorter with PCM memory than with other non-volatile memories such as 1T (single transistor) NOR flash.

The Stellar SR6 MCU family consists of two series, P and G, but they are based on the same platform.

The Stellar P Integration MCUs are designed to meet the needs of next-generation powertrain and electrification integration/domain systems, and feature high real-time performance and determinism to deliver a superior


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