The STM32U5 is the new generation of extreme power-saving microcontrollers based on Cortex-M33 to meet the most demanding power/performance requirements for smart applications including wearables, personal medical devices, home automation, and industrial sensors.
Low Power MCU - Kalapi Infotech
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STM32U5 series of Ultra-low-power MCUs Enhanced Security for IoT
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STM32U5 series of Ultra-low-power MCUs Enhanced Security for IoT
STMicroelectronics — STM32U5 Ultra-Low-Power Microcontrollers
STM32U5 Cortex-M33 MCU gets more performance, 2D graphics
STM32 - Wikipedia
Engineering:STM32 - HandWiki
ST Introduces New Series of Ultra-Low-Power MCUs
ST Introduces New Series of Ultra-Low-Power MCUs
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STM32 - Wikipedia