TrustZone in ARM Cortex M3

TrustZone is a feature of Armv8-M based microcontrollers. The Arm Cortex-M3 is a Armv7-based device. So you need a Cortex-M23/33/55/85 based device. Please also note that not every Armv8-M based device is TrustZone enabled. Check with the MCU vendor if TrustZone is implemented in a specific device.

Hi there, thank you for asking a question. I have moved your question to the Architectures and Processors forum. Many thanks.

Thanks Hans

Thanks Hans

How to enable or add TrustZone in case the vendor didn't enabled it on Cortex-M23/33/55/85 based device?

Is it possible to add TrustZone (software based) in Cortex-M3?

TrustZone for Cortex-M was added in Armv8-M architecture. The processors you mention at Armv7-M. See the following links for more information:

https://www.arm.com/technologies/trustzone-for-cortex-m

https://developer.arm.com/Processors/TrustZone%20for%20Cortex-M

Regards, Ronan