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  • Cortex-M23/M33 dynamic power

    I am doing a survey of the Cortex-M processors, and came across the M23/M33, which are described as having very low power like the M0. Are there some actual numbers (for example, with the smallest configuration, with TrustZone, in 28HPM or 40LP)? Or,…

  • Which of the Cortex-M processors support TrustZone for ARMv8-M today?

    Another question that I see come up once in a while.

     

    Both the Cortex-M33 and the Cortex-M23 support TrustZone for ARMv8-M.

    Cortex-M23 is the smallest lowest power TrustZone Cortex processor from ARM.

    Cortex-M33 is a general purpose TrustZone processor…

  • What is the top level difference in features between Cortex-M23 and Cortex-M33?

    Both processors have TrustZone for ARMv8-M. The following table compares the other top level features.

     

     

    *Performance numbers are preliminary

  • Link to download gcc support for TrustZone for ARMv8-M

    * All GCC 6 features, plus latest mainline features:
      + Full ARMv8-M support including atomics and Security Extensions
      + ARM PURECODE support for ARMv7-M and ARMv8-M Mainline
      + Co-processor intrinsics support
      + Cortex-M23 and Cortex-M33 support
      + -mthumb…

  • What is the top level difference in features between Cortex-M33 and Cortex-M4?

    This is a very common question.

    The diagram below is a pictorial description of the differences followed by some explanations.

    Cortex-M33 v Cortex-M4 features

    Starting from the bottom:

    • Cortex-M33 is an implementation of the ARMv8-M architecture. Full details are in my blog on the 5…

  • What is the top level difference in features between Cortex-M23 and Cortex-M0+?

    This is a very common question too.

    The diagram is a pictorial description of the differences followed by some explanations.

     

     

    Starting from the bottom:

     

    -Cortex-M23 is an implementation of the ARMv8-M architecture. Full details here.

    -Using the same debug…

  • Technical Reference Manual for Cortex-M33 is released to the web

    For those looking for more technical information for the Cortex-M33 the TRM is now posted in info center

     

    http://infocenter.arm.com/help/topic/com.arm.doc.100230_0002_00_en/cortex_m33_trm_100230_0002_00_en.pdf

     

    The Cortex-M23 TRM was posted a while b…

  • Cortex-M23 FVP hard faults when using DS-5 Debugger

    Hi,

    I'm starting to explore this technology by running the TrustZone example application in Linux using GNU ARM Toolchain. This example is provided by a CMSIS software pack containing this example called "TrustZone for ARMv8-M No RTOS" which I was…

  • Why should we call secure function in handler mode?

    Why should we call secure function in handler mode? What is the design purpose for this?  As we know, none-secure side can also call secure function in thread mode.

  • Cortex-M23 and Cortex-M33 - Security foundation for billions of devices

    October 19, 2004 was a date like any other, and will probably not mean much to most people. However, if you are part of the Embedded community, that precise date was transformational for the microcontroller (MCU) industry. It was the day that ARM announced…

  • Whitepaper - ARMv8-M Architecture Technical Overview

    The next generation of ARM Cortex-M processors will be powered by a new architecture version called ARMv8-M architecture. This document provides a technical overview of various enhancements in the new architecture, as well as an introduction to the security…

    • Whitepaper - ARMv8-M Architecture Technical Overview.pdf