STM32 Ultra Low Power with L0/L4

In this Article we’ll take a look at the STM32L0 and the STM32L4 ultra-low-power microcontroller families.

STM32L0 series Cortex®-M0+

The L0 is a genuine Ultra-Low-Power MCU product with record breaking performances, build around the ARM® Cortex®-M0+.

Combining a genuine ultra-low-power architecture with low-current analog peripherals and four low-power modes, the STM32L0 is ideal for applications such as mice, keyboards, gas/water meters, building automation, alarms, detectors and health care or fitness applications. For applications that require a 15 to 20 year life duration, or need to run in extremely high temperature conditions, here again the STM32L0 is the best choice thanks to ST‘s process technology.

Cortex®-M0+

(32 MHz with MPU)

• Low voltage 1.65 to 3.6V
• Dynamic Voltage Scaling
• 5 clock sources
• Advanced RTC w/ calibration
• 12-16-bit more ADC 1Msps down to 1.65V
• Multiple USART, SPI, I²C
• Multiple 16-bit timers
• Operating Temp. – 40 to 125°C
  2 watchdogs
• Program Voltage Detector
• Reset circuitry

Low-Power Timer

(DOWN TO STOP MODE)

• Ultra-low power consumption
• Low-power pulse counter
• Independent 16-bit timer
• Pulse counter with no clock running or clocked by LSE, LSI, HSI, APB
• System wakeup from Stop mode
• Programmable digital glitch filter
• Encoder mode

• Low-Power UART & ADC

STM32L4 series Cortex®-M4 MCUs

32-bit MCUs with ultra-low-power at 100 DMIPS with DSP and FPU
ST has built a new architecture to reach best-in-class ultra-low-power figures thanks to its high flexibility. STM32L4 MCUs have scored 150 (world record) in the standardized EEMBC™ ULPBench® tests that compare the efficiency of ultra-low-power microcontrollers. Moreover, the STM32L4 series shatters performance limits in the ultra-low-power world. It delivers 100 DMIPS based on its ARM® Cortex®-M4 core with FPU and ST ART Accelerator™ at 80 MHz. The Flyer for the STM32L4 Series 698 ich downloadable.

Features & Benefits

• 100 DMIPS based on its ARM® Cortex®-M4 core with FPU and ST ART Accelerator™ at 80 MHz
• 150 score in the standardized EEMBC™ ULPBench® tests that compare the efficiency of ultralow-power microcontrollers
• New architecture to reach bestin-class ultra-low-power figures thanks to its high flexibility
• Dynamic voltage scaling to balance power consumption with processing demand, low-power peripherals. Available in Stopmode, safety and security features, smart and numerous peripherals, advanced and low-power analog peripherals such as op amps, comparators, LCD, 12-bit DACs and 16-bit hardware oversampling from a native 12-bit 5 MSPS ADC
• Performance close to limits in the ultra-low-power world
• Ultra-low-power mode: 30 nA with backup registers without real-time clock (5 wakeup pins)
• Ultra-low-power mode + RTC: 330 nA with backup registers
• Ultra-low-power mode + 32 kB of RAM: 360 nA
• Ultra-low-power mode + 32 KBytes of RAM + RTC: 660 nA
• Dynamic run mode: down to 100 μA/MHz
• Wake-up time: 5 μs
• Pin-to-pin compatible – opens the door to the full STM32 ecosystem