Hirain put its AUTOSAR basic software on a domestic Chinese automotive MCU

Beijing Hirain Technologies said on October 22 that it had adapted its HIRAIN OS basic software to Immorta’s IM94-series automotive microcontrollers.

The company said the work was based on HIRAIN OS.EAS, the basic software platform in its HIRAIN OS family, and that it optimized the driver layer, basic software configuration, the communication stack and diagnostic services against the hardware to meet ASIL B functional safety and hardware security module requirements. Hirain describes OS.EAS as covering the AUTOSAR Classic and Adaptive platforms, SOVD, over-the-air updates and security.

Immorta, a Shanghai company founded in May 2022, builds the IM94 family on an Arm Cortex-M4F core with a DSP instruction set and a floating-point unit. Hirain said the series supports ASIL B and has passed AEC-Q100 Grade 1 reliability testing, with the IM94xxA variant holding ISO 26262 ASIL B product certification and shipping in volume. The family’s top clock of 160 MHz belongs to the higher-specification IM94xxB, which Hirain said also doubles on-chip memory and moves to the full hardware security module configuration; Immorta’s product page puts the IM94xxA at 120 MHz. The parts carry a hardware security module in medium and full configurations, supporting AES, RSA and ECC alongside China’s SM2, SM3 and SM4 algorithms, with a separate security core and separate secure storage. Dual-bank flash with read-while-write and a hardware A/B swap is there for updates and rollback.

The applications named are body and comfort functions — ambient lighting, seats, windows, wipers, body control, climate control and matrix headlamps — plus motor control and battery management. Hirain said it works with dozens of domestic chip companies and offers support from chip adaptation through ISO 26262 ASIL B, C and D certification to production. The release named no carmaker customer and no volumes.