The Cortex-M23 processor is a very compact, two-stage pipelined processor that supports the Armv8-M baseline instruction set. The Cortex-M23 with TrustZone is the ideal processor for the most constrained embedded applications where security is a key requirement.
TrustZone for Armv8-M provides hardware-enforced isolation between the trusted and the untrusted resources on the Cortex-M23 device, while maintaining the efficient exception handling and determinism that have been the hallmark of all Cortex-M processors.
Everything you need to know about TrustZone for Armv8-M is here.
- Trusted execution even in the smallest, lowest-power and most constrained embedded devices.
- Low power that enables security in energy harvesting IoT nodes.
- Reduced development costs by leveraging the vast ecosystem of 3rd party tools, operating systems and software.
- An entry point to the Armv8-M based processor family, approximately one third the size of Cortex-M33 and more than twice its energy efficiency. It is upward code compatible to the Cortex-M33.
|Architecture||Armv8-M Baseline (Von Neumann)|
|ISA Support||Thumb/Thumb-2 subset|
|TrustZone||Optional TrustZone for Armv8-M|
|Memory Protection||Optional Memory Protection Unit (MPU) with up to 16 regions per security state|
|Interrupts||Non-maskable Interrupt (NMI) and up to 240 physical interrupts with 4 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 WFI and WFE Instructions and Sleep On Exit capability
Sleep & Deep Sleep Signals
|Enhanced Instructions||Hardware single-cycle (32x32) multiply and fast (32/32) divide option|
|Debug||Optional JTAG or Serial Wire Debug ports, up to 4 Breakpoints and 4 Watchpoints|
|Trace||Optional Micro Trace Buffer (MTB) or Embedded Trace Macrocell (ETM)|
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The Cortex-M23 processor brings the highest energy-efficiency to cost-sensitive devices where security is a key requirement.
Energy harvesting IoT nodes
Digital motor control
Asset tracking services
TrustZone for Armv8-M
A foundation for security for embedded devices. TrustZone offers software isolation to code, memory and I/O while retaining the requirements of embedded applications: real-time deterministic response, minimal switching overhead, and ease of software development.
Interested in learning how to program Secure and Non-secure domains on a processor with TrustZone?
Energy efficient two-stage pipeline processor
The smallest of Arm processors with TrustZone technology. Brings compactness and energy efficiency while providing support for the full Armv8-M baseline instruction set.
Memory Protection Unit (MPU)
Software reliability improves when each module is allowed access to specific areas of memory required for it to operate. This protection prevents unexpected access that may overwrite critical data. Each security zone can have a dedicated MPU.
Integrated Nested Vectored Interrupt Controller (NVIC)
There is no need for a standalone external interrupt controller. Interrupt handling is taken care of by the NVIC removing the complexity of managing interrupts manually via the processor.
Powerful debug and non-instrusive real-time trace
Comprehensive debug and trace features dramatically improve developer productivity. It is extremely efficient to develop embedded software with proper debug. Optional MTB and ETM.
Performance efficiency 2.50 CoreMark/MHz* and 0.98 DMIPS/Mhz**.
|Arm Cortex-M23 implementation data at 40LP (9-track, typical 1.1v, 25°C)
||Please contact Arm
||Please contact Arm|
||Please contact Arm||Please contact Arm|
* Preliminary data.
** Preliminary data, abides by all of the ground rules laid out in the Dhrystone documentation.
The Cortex-M23 processor can be incorporated into a SoC using a broad range of Arm technology including System IP and Physical IP. It is fully supported by Arm development tools. Related IP includes:
Cortex-M23 Technical Reference Manual
For system designers, integrators and testers, the Technical Reference Manual (TRM) provides details of the Cortex-M23 processor.Technical Reference Manual
White Paper: Armv8-M Architecture
Download this White Paper to get a technical overview of the Armv8-M architecture and an introduction to TrustZone security technology.Get the White Paper
White Paper: Cortex-M for beginners
This White Paper compares the features of various Cortex-M processors and describes how to select the right processor for the application.Get the White Paper
Embedded Development Tools for Cortex-M Series
Arm and its ecosystem partners provide a wide range of tools for embedded software development on Arm Cortex-M processors.Software Tools for Cortex-M
Arm Design Reviews
Arm's on-site design review service gives licensees confidence that their Cortex-M23 CPU is implemented efficiently, to provide maximum system performance, with lowest risk and fastest time-to-market.Explore Arm Design Reviews
Questions? Request more information
Learn more about Cortex-M23, Arm’s smallest and most energy efficient implementation of the Armv8-M architecture. Contact us to speak with our technical team.Find out more