Optimizing power and performance with STM32L4 Series microcontrollers Application note
■The STM32L4 Series microcontrollers are designed using an innovative architecture to reach best-in-class, ultra-low-power figures thanks to their high flexibility and advanced set of peripherals. The performance of the STM32L4 Series outclasses the competition in the ultra-low-power world by providing the best energy efficiency for applications.
■The STM32L4 Series devices are based on the Cortex®-M4 with FPU core. They can operate at up to 80MHz and achieve 100DMIPS performance at 80MHz, thanks to the integration of the ART Accelerator™, while maintaining the smallest possible dynamic power consumption.
■The STM32L4 Series features the FlexPowerControl function, which increases flexibility in power mode management, while at the same time reducing the overall application consumption.
■In order to maximize the battery life and/or reduce its cost, the selection of the processor working mode is critical. In addition to power consumption considerations, the application constraints also have to be taken into account. Consequently the microcontroller needs to offer a wide range of working modes in order to support all applications, while always providing close-to-optimum power performance.
■In many ultra-low-power applications the microcontroller is used with long periods of sleep time followed by very short periods of dense processing.
■This application note provides qualitative and quantitative information in order to be able to configure each operating point (frequency, range, low-power mode...), before starting the implementation and optimization. All the computations are performed with typical data from the STM32L4 datasheet and at ambient temperature, unless otherwise specified.
■This application note uses the industry-standard ULPBench™ benchmark from EEMBC as a reference case to correlate the computations and simulations with the measurements.
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STM32L4 Series 、 STM32L4 、 STM32L49xxx 、 STM32L47xxx 、 STM32L45xxx 、 STM32L43xxx 、 STM32L44xxx 、 STM32L46xxx 、 STM32L4Axxx 、 STM32L4P5xx 、 STM32L4Q5xx 、 STM32L41x 、 STM32L476xx 、 STM32L476 |
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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16-Dec-2019 |
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Rev 3 |
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AN4746 |
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780 KB |
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