Microchip: 32-bit MCUs feature robust, chip-level security and Arm TrustZone technology

Microchip announces the new SAM L10 and SAM L11 families of 32-bit microcontrollers (MCUs) which address the growing need for security in IoT endpoints by protecting against the increasing the risk of exposing intellectual property and sensitive information.

The new MCU families 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. Microchip enables robust security by including chip-level tamper resistance, secure boot and secure key storage which, when combined with TrustZone technology, protects customer applications from both remote and physical attacks.

Both MCU families offer the industry’s lowest power consumption, as well as capacitive touch capability with best-in-class water tolerance and noise immunity. When benchmarked for power consumption, the SAM L10 received a ULPMark score of 405, which is over 200 percent better performance than the nearest competitor certified by the Embedded Microprocessor Benchmark Consortium. Microchip uses proprietary picoPower technology to provide industry-leading low power consumption in active and all sleep modes.

In addition to TrustZone technology, the SAM L11 security features include an on-board cryptographic module supporting Advanced Encryption Standard, Galois Counter Mode and Secure Hash Algorithm. The secure boot and secure key storage with tamper detection capabilities establish a hardware root of trust. It also offers secure bootloader for secure firmware upgrades.

The SAM L10 and SAM L11 Xplained Pro Evaluation Kits are available to kick-start development. All SAM L10/L11 MCUs are supported by the Atmel Studio 7 IDE, IAR Embedded Workbench, Arm Keil MDK as well as Atmel START, a free online tool to configure peripherals and software for accelerated development. START also supports TrustZone technology for configuring and deploying secure applications. A power debugger and data analyser tool is available to monitor and analyse power consumption in real-time and fine-tune the consumption numbers on-the-fly to meet application needs. Microchip’s QTouch Modular Library, 2D Touch Surface Library and QTouch Configurator are also available to simplify touch development.


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