Achieved 176.70 ULPMark™-CP without a buck converter
Achieved 273.55 points on EEMBC CoreMark® at 80MHz

STMicroelectronics has launched a new microcontroller that achieves new records in terms of power consumption and performance, adding it to the STM32L4 series. This new microcontroller also offers peripherals and package configurations that help simplify design and enhance flexibility.

In the low-power microcontroller test EEMBC® ULPBench™, it achieved a score of 176.70 ULPMark™-CP without a buck converter requiring external components such as coils or capacitors, surpassing the scores of well-known products from other companies. In addition, it achieved a score of 273.55 on EEMBC CoreMark® at 80MHz, proving that it combines top performance and power efficiency.

This outstanding performance and efficiency stem from the features of the smart architecture. These include independently assignable supply voltages and programmable multi-speed internal clocks, as well as Batch Acquisition Mode (BAM) and ST’s Adaptive Real-Time Accelerator™ (ART Accelerator). Multiple power management modes, including ultra-low power 8nA shutdown, help maximize power savings.

The STM32L471 is for projects that do not require an LCD controller or USB connection.
The STM32L475 is a full-speed USB OTG controller

With the six new STM32L4 lines, you can take advantage of all these benefits when designing, along with a wider range of application-specific features, cost-effectiveness, and package options. The STM32L471 combines 1MB of flash memory with rich analog and audio capabilities, making it suitable for LCD controllers or projects that do not require a USB connection. The STM32L475 features a full-speed USB OTG controller. Both products are equipped with numerous timers, clock sources, and communication interfaces, including CAN, SDMMC, USART, SPI, and I2C. Analog peripherals include a 12-bit ADC with 5MSPS performance and power-saving mode, two 12-bit DACs, two op-amps with built-in Programmable-Gain Amplifiers (PGAs), and two ultra-low-power comparators.

The STM32L432 and STM32L433 provide ARM® Cortex®-M4 core performance of up to 100 DMIPS in lightweight applications requiring up to 256KB of flash. The STM32L432 features analog and audio capabilities along with a Crystal-Less USB controller, while the STM32L433 also features an LCD controller. Both product lines additionally support 7mm x 7mm UFBGA100 and 3.14mm x 3.13mm WLCSP49 package options, and also provide the small footprint UFQPN32 for customers who find WLCSP assembly difficult.

In addition, the STM32L442 and STM32L443 product lines not only provide the same powerful feature set and flexibility as the STM32L432/433, but also support additional cryptographic accelerators per device.

The newly added STM32L4 series offers greater options and flexibility when smart connected IoT (Internet of Things) products, such as wearables or home automation controllers, are required, or when multifunctional peripherals and connectivity are needed for industrial and medical devices. Furthermore, with guaranteed product availability of over 10 years, a wide temperature range, and high on-chip memory capacity, it is an ideal product for smart meters requiring a robust single-chip solution.

The price of the STM32L432KBU6, featuring 256KB flash and 64KB SRAM in a QFN-32 package, is $2.13 for orders of 10,000 units. Mass production of the new product line is scheduled to begin in the first and second quarters of 2016.