Under the UNECE WP.29 regulatory framework, all newly produced vehicles must comply with R155 (Cybersecurity) and R156 (Software Updates) requirements from July 1, 2024. In China, the mandatory national standards GB 44495—2024 (Automotive Cybersecurity) and GB 44496—2024 (Automotive Software Updates) were officially released in 2024 and will take effect on January 1, 2026.
These standards define clear requirements for vehicle cybersecurity management, technical safeguards, and software update mechanisms, providing a regulatory and technical foundation for the safe development of intelligent and connected vehicles.
In response to these requirements, we recommend the AC7805, a new flagship member of GAC Technology’s AC780 series. AC7805 supports ASIL-B functional safety, complies with ISO/SAE 21434, and meets EVITA Light security requirements, offering a cost-effective and standards-compliant cybersecurity solution for automotive applications.
Technical Specifications
Core Performance
ARM Cortex-M0+ core @ 72MHz
Hardware divider & RMS coprocessor for motor control applications
Memory
Up to 256KB ECC flash + 128KB ECC eFlash
32KB SRAM with ECC support
Reliability
AEC-Q100 Grade 1 compliant
Ambient temp: -40°C to +125°C
Junction temp: -40°C to +150°C
Functional Safety
ASIL-B capable (with safety package)
Integrated safety mechanisms
Cybersecurity
ISO/SAE 21434 compliant
EVITA Light functional requirements
Secure boot/debug/OTA & key management
Packaging
LQFP64/48, QFN32
Hardware/software compatible with AC780/AC784 series
Enables seamless migration with minimal redesign
AC7805 with EVITA Light-compliant HSM
A cost-optimized security solution meeting both compliance requirements and cost-control objectives - delivering optimal security economics.
EVITA Light compliant
AES-ECB/CBC encrypt/decrypt
TRNG
Multiple OTP keys (OTP section)
Multiple user keys (Flash storage)
RAM key support
Lifecycle Lock/Unlock control
Low-power wake-up with secure bypass
Secure Boot with authentication, secure updates, and encrypted communication
Robust Functional Safety Mechanisms
The AC7805 meets ISO 26262 ASIL-B requirements, making it suitable for automotive functional safety applications such as combination switches, vehicle lighting, and current sensors. It integrates comprehensive safety features, including:
Watchdog timer
Clock monitoring
Voltage monitoring
Memory ECC & CRC
Power-on hardware self-test
E2E protection for communication interfaces
A safety package is available to streamline functional safety development.
Supports diverse application scenarios
The AC7805, entering mass production by end of 2024, has gained strong market traction. This solution is ideal for:
Digital keys
Lighting systems
Gear selectors
Seat controls
Combination switches
PEPS systems
Motor control
Smart sensors (rain/light, ultrasonic radar, mmWave radar)
Current sensors
Conclusion
With growing cybersecurity demands in automotive architecture, domestic chips are prioritizing security design. AutoChips' AC7805 enhances localized vehicle cybersecurity, enabling safer mobility solutions.
For AC7805 evaluation boards, technical documentation, solutions, or commercial inquiries, please contact us.
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