The devices offer active tamper detection and protection against transient and environmental perturbation attacks, thanks to several internal monitoring generating secret data erase in case of attack.
The devices embed several peripherals reinforcing security: a HASH hardware accelerator, and a true random number generator. The devices feature several protection mechanisms for embedded flash memory and SRAM: readout protection, write protection, secure and hide protection areas. Firmware hardware isolation is supported thanks to securable peripherals, memories and I/Os, and privilege configuration of peripherals and memories. A flexible life cycle is managed thanks to multiple levels of readout protection and debug unlock with password. Besides these capabilities, the devices incorporate a secure firmware installation feature, that allows the customer to secure the provisioning of the code during its production. It embeds the necessary security features to implement a secure boot, secure data storage and secure firmware update. The devices offer security foundation compliant with the TBSA (trusted-based security architecture) requirements from Arm ®. The devices embed high-speed memories (up to 4 Mbytes of flash memory and 2.5 Mbytes of SRAM), a FSMC (flexible external memory controller) for static memories (for devices with packages of 100 pins and more), two Octo-SPI and one Hexadeca-SPI memory interfaces (at least one Quad-SPI available on all packages) and an extensive range of enhanced I/Os and peripherals connected to three APB buses, three AHB buses and a 32-bit multi-AHB bus matrix.
The Cortex ®-M33 core also implements a full set of DSP (digital signal processing) instructions and a MPU (memory protection unit) that enhances the application security. The Cortex ®-M33 core features a single-precision FPU (floating-point unit), that supports all the Arm ® single-precision data-processing instructions and all the data types.
They operate at a frequency of up to 160 MHz. The STM32U59xxx devices belong to an ultra-low-power microcontrollers family (STM32U5 Series) based on the high-performance Arm ® Cortex ®-M33 32-bit RISC core.
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