STM32L5 – Excellence in ultra-low-power with more performance – Based on Cortex M33

If you like it, share it

Security has emerged as one of the 3 key areas that developers of embedded and IoT applications are thriving to improve. The STM32L5 microcontroller series is the solution and provide a new optimal balance between performance, power and security.
The STM32L5 MCU series harnesses the security features of the Arm Cortex-M33 processor and its TrustZone for Armv8-M combined with ST security implementation. ST-proprietary ultra-low-power technologies create a class-leading MCU for energy-conscious applications such as Internet of things (IoT), medical, industrial and consumer.

Offering up to 512 Kbytes of flash (dual bank) memory and 256 Kbytes of SRAM, the STM32L5 series of microcontrollers reaches an upgraded level of performance (427 CoreMark) thanks to this new core and a new ST ART Accelerator™ (supporting now also external memory).

Introduction – Top caracteristics of STM32L5 family

4 keys Innovations points

1. Strong focus on Security: Innovations points
…..Trust Zone
…..• Active tampering
…..Temperature/Voltage/frequency protection (PCI for Mobile POS)
…..• Elliptic curve aceleration (PKA)
…..Crypted Octo SPI
…..Secured Bootloader
2. Power consumption:
…..• Optimized DC/DC +LDO with switching on the fly
…..• Optimized RTC consumption (100 nA including Crystal)
3. Performance:
…..Cache for external memory
4. New IP:
…..USB type C connector

A full set of security

Flexible hardware and software secure isolations with TrustZone
Enhanced security services: dedicated secure user memory space for Secure Boot, symmetric and asymmetric crypto accelerations, memory and IP protection, independent Read out protection between secure / non secure domains, active IO tamper detection, certified cryptolib, embedded Secure Firmware Install loader and ecosystem.

Best power consumption

EEMBC ULPBench®: 402 ULPMark-CP score
Embedded SMPS step down converter (optional)
Best power consumption numbers with full flexibility:
33 nA in shutdown mode
3.6 µA in stop mode with full SRAM and peripheral states retention with 5µs wake-up time
Down to 60 µA/MHz in active mode

Integration, size and performance

Better responsiveness of the application:
New Arm Cortex-M33 at 110 MHz performance: +20% versus Cortex-M4
New ST ART Accelerator: working both on internal and external Flash (8 Kbytes of instruction cache)
Achieving 165 DMIPS and 427 CoreMark scores
High integration and innovation: large memory, USB Type-C w/power delivery controller, CAN FD
Large portfolio: 7 packages type (LQFP48, QFN48, LQFP64, WLCSP81, LQFP100, UFBGA132 and LQFP144) for several options

Click here to go on TOP

Cortex M33 vs M4

Click here to go on TOP

STM32L5 presentation & more

Click here for get the STM32L5 presentation

Click here to go on TOP