Tamper-resistant Cortex-M processor with optional software isolation using TrustZone for Armv8-M

Overview

For embedded developers seeking to hinder physical tampering and achieve a higher level of security certification, Arm offers the Cortex-M35P: a robust, high-performing processor. It builds upon the proven Arm Cortex-M technology deployed in billions of SoCs, making physical and software security accessible for all developers.

Physical security is generally complex – however, the ease-of-use of the Cortex-M35P processor, combined with the support of Arm and the Arm ecosystem, now open the door for embedded developers to deliver many new devices with physical resilience at the heart.

Key Features

Architecture: Armv8-M Mainline (Harvard)
ISA Support: Thumb/Thumb-2
Pipeline: Three-stage
Software security: Optional TrustZone for Armv8-M, stack pointers checking
Physical security: Built-in protection from invasive and non-invasive attacks
DSP Extensions
- Optional DSP/SIMD instructions
- Single cycle 16/32-bit MAC
- Single cycle dual 16-bit MAC
- 8/16-bit SIMD arithmetic
Floating Point Unit
- Optional single precision floating point unit
- IEEE 754 compliant
Co-processor interface: Optional dedicated co-processor bus interface for up to 8 co-processor units for custom compute
Memory Protection: Optional Memory Protection Unit (MPU) with up to 16 regions per security state
Interrupts: Non-Maskable Interrupt (NMI) and up to 480 physical interrupts with 8 to 256 priority levels
Wake-up Interrupt Controller: Optional for waking up the processor from state retention power gating or when all clocks are stopped
Sleep Modes: Integrated Wait for Event (WFE) and Wait for Interrupt (WFI) instructions with Sleep On Exit functionality
Debug: Optional JTAG and Serial Wire Debug ports. Up to 8 Breakpoints and 4 Watchpoints
Trace: Optional Instruction Trace (ETM), Micro Trace Buffer (MTB), Data Trace (DWT), and Instrumentation Trace (ITM)
Cache: Instruction cache

Benefits

Cortex-M35P extends the anti-tampering features of the SecurCore family of processors, making this state-of-the art technology available to Cortex-M developers. Robust embedded security is more accessible than ever with the benefits of both physical and software security, using the optional TrustZone isolation.

Block Diagram

Applications

Payment
Integrated or Embedded Secure Elements
Secure embedded applications
IoT
Industrial
Automotive
Healthcare
Medical
Biometric data

Technical Specifications

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