STM32L4R9 and STM32L4S9 devices extend the ultra‐low‐power portfolio and performance with an Arm® Cortex®‐M4 core with DSP and floating‐point unit (FPU) at 120 MHz.

  • The STM32L4R9 portfolio offers from 1 to 2 Mbytes of Flash memory and from 100 to 169-pin packages.
  • The STM32L4S9 is available with 2 Mbytes of Flash memory and provides an additional encryption accelerator engine (AES, HASH).