 Hello and welcome to this introduction to the STM32L5 series training session. It describes the feature sets available in the STM32L5 microcontroller series. The main challenge faced by our customers is to protect from hackers at logical and board level attack and to add more security. The second concern is related to the low power consumption in order to reduce the battery size and increase the lifetime. In the end, the target is to define the right microcontroller which fits the application requirements the best in terms of integration, size and performance. The STM32L5 microcontroller is the first STM32MCU based on the Cortex M33 core. It provides more security with trust zone and ST security implementation. It offers lower power consumption, reusing the STM32 best-in-class ultra-low power technology and adds innovation. Thanks to a large portfolio, high memory size and better performance, it can fit into a large number of applications. In addition to trust zone, it shows a full set of security. Besides a symmetric keys accelerator, a true number generator and a certified crypto library, it provides a private key accelerator or PKA for asymmetric cryptography. In terms of memory and IP protection, it offers an active temperature and voltage tampering. Two new features are also reinforcing the security level and help the design of a route of trust. HTTP or Hyde Protect, which provides higher protection by a hardware secure boot with secure keys and a unique boot entry, which defines the address to boot. The second main message is about power consumption. The STM32L5 series reuses the STM32L4 and L4 Plus technology, achieving best-in-class power consumption. It integrates an optional SMPS or DC to DC buck voltage regulator which can be enabled or disabled on the fly to avoid external noise for external RF or data acquisition. This excellence in power consumption is proven by the EEMBC benchmark scores, 370 ULP marks with the core profile benchmark and 54 ULP marks with the peripheral profile benchmark. The STM32L5 series offers best-in-class power consumption figures with a full flexibility. The user can select the mode depending on the wake-up time, the state of attention, and the number of sources required. The STM32L5 series provides more performance thanks to its new core. The Cortex M33 core gives 20% more performance running at the same frequency and so achieving 1.5 D MIPS per MHz leading to 165 D MIPS or 442 core mark. Furthermore, it supports a new version of the STR accelerator. In addition to the internal flash memory, this version also supports external memory thanks to its 8 kilobytes instruction cache which enables a higher performance as well as a better power efficiency. Here is the block diagram of an STM32L5 microcontroller. This product embeds a long list of digital and analog peripherals as well as a large memory size, up to 512 kilobytes of flash dual bank and 256 kilobytes of SRAM. In addition to a USB crystal-less port, it provides an extended connectivity with a USB Type-C port with power delivery support and CAN-FD. The STM32L5 series is available in 7 packages with several options with or without the crypto accelerator, 512 or 256 kilobytes of flash memory and with or without the SMPS buck converter, so a large portfolio.