Microchip announced two new families of 32-bit microcontrollers (MCUs), SAM10 and SAM L11, to meet the growing need for security in Internet of Things (IoT) endpoints.
The devices are based on the Arm Cortex-M23 core, with the SAM L11 featuring Arm TrustZone for Armv8-M, a programmable environment that provides hardware isolation between certified libraries, IP and application code. There’s also chip-level tamper resistance, secure boot and secure key storage which, when combined with TrustZone technology, protect applications from remote and physical attacks.
In addition to TrustZone technology, the SAM L11 security features include an on-board cryptographic module supporting Advanced Encryption Standard (AES), Galois Counter Mode (GCM) and Secure Hash Algorithm (SHA). The secure boot and secure key storage with tamper detection capabilities establish a hardware root of trust and bootloader for secure firmware upgrades.