Arm® Cortex®-M85 in a nutshell
Introduction:
The Arm Cortex®-M85 processor unlocks the highest compute performance along with advanced DSP and ML capabilities for endpoint AI applications in IoT devices. It delivers over 6 CoreMark/MHz, enabling demanding use cases to be realized on a single, simple-to-program Cortex®-M processor. Cortex®-M hallmarks such as determinism, short interrupt response time, and state-of-the-art low-power management remain uncompromised on the Cortex®-M85.
The Cortex®-M85 is the highest performing Cortex®-M processor based on Arm Helium vector processing technology, delivering unprecedented scalar, DSP, and ML performance for Cortex®-M class devices. It offers developers a fast path to AI-enabled IoT solutions with a broad ecosystem and integrated security features.
Key features of Arm® Cortex®-M85 core
- Armv8.1-M mainline architecture
- Bus interface AMBA® 5 AXI5 64-bit master (compatible with AXI4 IPs)
- 4-stages pipeline
- TrustZone® technology for Armv8-M security
- Digital signal processing (DSP) extension
- Hardware divide instruction
- Arm custom instructions
- Up to 64 Kbytes instruction cache with ECC
- Up to 64 Kbytes data cache with ECC
- Up to 16 Mbytes instruction tightly coupled memory (TCM) with ECC
- Up to 16 Mbytes data TCM with ECC
- Supports up to 480 external interrupts + non-maskable interrupt (NMI)
- Maximum 16 MPU regions
- Dual core lock-step (DCLS) configuration
- Multiple power domains, sleep modes (sleep, deep-sleep), sleep-on-exit, optional retention support for memories and logic
- Internal/external wake-up interrupt controller
- Hardware and software breakpoints
- Performance monitoring unit (PMU)
- Optional instruction trace
- Data trace (DWT)
- Instrumentation trace macrocell (ITM)
Arm Cortex-M85 block diagram Key advantages of Arm® Cortex®-M85 core
The Cortex®-M85 processor is designed to deliver ultimate endpoint AI performance with the highest scalar, DSP, and ML throughput in the Cortex®-M family. It integrates Arm Helium vector processing technology, enabling enhanced, power-efficient DSP and machine learning capabilities with over 6 CoreMark/MHz performance.
The Cortex®-M85 supports Arm TrustZone® technology for robust embedded security, and introduces the new PACBTI extension, which provides pointer authentication and branch target identification, further mitigating control-flow attacks.
Its floating-point unit supports half-, single-, and double-precision formats, enabling flexible and efficient processing for a wide range of signal and sensor data workloads.
The Corstone-310 reference package accelerates time-to-market by providing a secure, pre-integrated SoC subsystem, including power and clock infrastructure, TrustZone® security, and software ecosystem support.
Microcontrollers based on the Arm® Cortex®-M85
The STM32V8 is the first STM32 MCU featuring an Arm Cortex®-M85 core
Explore Arm® Cortex®-M cores in STM32 32-bit microcontroller portfolio:
