STMicroelectronics has introduced the development ecosystem for its latest low-power, high-performance STM32L4 microcontrollers (MCU) and expanded the series with five new product lines comprising a range of package and memory-density options.

The expanded STM32L4 ecosystem builds on ST’s free and easy-to-use STM32Cube platform. This comprises the STM32CubeMX initialisation-code generator and configurator with easy-to-use power estimation for ultra-low-power design, and the STM32CubeL4 package that contains middleware components, Nucleo-32 Board-Support Package (BSP), Hardware Abstraction Layer (HAL), and Low-Layer APIs (LLAPIs). For a quick start to new projects, the slim-form-factor NUCLEO-L432KC board—the first Nucleo-32 board to integrate an MCU in the tiny QFN32 package—includes an STM32L432KCU6 device (UFQFPN32) and provides direct access to ARM mbed online tools. Its Arduino Nano pin layout simplifies function extensions, and the integrated ST-Link debugger/programmer supports mass storage and allows probe-free debugging.

Five new STM32L43x and STM32L44x MCU product lines comprise variants with versatile combinations of an integrated USB controller, an LCD controller, and cryptography for security-conscious applications. Up to 256KByte of Flash and low-pin-count-package choices make them ideal for cost-sensitive applications. The new devices also offer rich digital peripherals including a True Random-Number Generator (TRNG) and smart analogue features such as a 12-bit 5Msample/s ADC, internal voltage reference, and ultra-low-power comparators.

All devices deliver the advantages of ST’s innovative low-power technology, which includes FlexPowerControl (FPC) with features such as separate supply-voltage domains for gating power individually to analogue peripherals, USB circuits, and I/Os. Batch-Acquisition Mode (BAM) enables energy-efficient data capture and seven reduced-power modes with further sub-modes maximise energy savings in a wide range of operating conditions.

ST’s low-power technologies, combined with the performance of the 32-bit ARM Cortex-M4F core, ensure high efficiency according to EEMBC ULPBench tests. The STM32L433 is certified at 177 ULPMark-CP at 3.0V, tested without the aid of a step-down converter. Aided by ST’s innovative ART Accelerator, outright performance is also high at 273 CoreMark.

The new devices are available immediately, in small-form-factor packages from 5mm x 5mm QFN-32 to 14mm x 14mm LQFP-100, including 3.14mm x 3.13mm WLCSP. Prices start from $2.045 for the STM32L431KBU6 with 128KByte Flash and 64KByte SRAM in QFN-32, for orders of 10,000 pieces.