Arm TrustZone for ARMv8-M technology is an optional core extension implemented on PIC32CM LS00/LS60 devices, which enables the system and
the software to be partitioned into Secure and Non-Secure domains.
Secure software can access both Secure and Non-Secure memories and resources,
while Non-Secure software can only access Non-Secure memories and resources.
Arm TrustZone for ARMv8-M allows Secure and Non-Secure code to run on a single CPU.
Note: The system always starts up in Secure
state.
Figure 12-1. TrustZone for ARMv8-M
Important: For more details,
refer to TrustZone Technology for ARMv8-M Architecture, which is available on the
Arm web site (www.arm.com).
The memory space is partitioned into Non-Secure and Secure memory regions:
Non-Secure (NS):
Non-Secure addresses are used for memory and peripherals accessible by all
software, that is, running on the device.
Secure (S): Secure
addresses are used for memory and peripherals accessible only by Secure software
or hosts.
Non-Secure Callable (NSC):
NSC is a special type of Secure memory location. It allows software to
transition from Non-Secure to Secure state.
The online versions of the documents are provided as a courtesy. Verify all content and data in the device’s PDF documentation found on the device product page.
