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Date: 24-03-17

The new STM32L4 MCUs score 273 in EEMBC CoreMark

The new STM32L4 MCUs from STMicroelectronics STM32L496 and STM32L4A6 offering on-chip RAM up to 320 Kbytes and flash memory of 1 Mbyte scored 273 in EEMBC CoreMark, making them attractive for low power performance by also achieving ULPBench score of 217 .

The other features include:

  1. ST Chrom-ART Accelerator graphics engine for smoother display performance in energy-conscious applications such as IoT devices and smart watches
  2. An extra CAN interface, a camera interface and crystal-less Full Speed (FS) USB OTG.
  3. A new high-pin-count UFBGA169 package option gives extra flexibility to exercise these new peripherals.
  4. STM32L4A6 with hardware cryptographic acceleration implements SHA-256 and AES-128/192/256 algorithms
  5. Active-mode current of just 37µA/MHz enables longer runtime on small batteries and extends scope to create energy-neutral products powered from ambient sources.

ST said it also extended the flexibility of the STM32L4 power architecture, giving developers the option to power the core from an external DC/DC converter for extra efficiency. The STM32L4 Flex Power Control architecture includes a new shutdown mode for additional energy savings, alongside multiple independent core and peripheral supplies, and a separate VBAT domain with charging circuitry that gives flexibility to utilize or recharge battery energy.

Chip price: Budgetary pricing is from $4.63 for the STM32L496RET6 with 512 Kbytes Flash and 320 Kbytes SRAM in LQFP64 package, for orders of 10,000 pieces per year.

Board price: The development board is priced starting  at $19 for the legacy-compatible Nucleo-144 board (NUCLEO-L496ZG), which is available now. The Discovery Kit (STM32L496G-DISCO) is also available now, priced 70$. The NUCLEO-L496ZG-P board with external DC/DC converter will be available to distributors in April 2017.

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