STM32L4+ Series Microcontrollers STMicroelectronics STM32L4+ Series Microcontrollers offer up to 120MHz of performance and up to 2MB of Flash memory and 640Kbytes of SRAM. The STM32L4+ has rich graphics and connectivity features while keeping ultralow‐power capability. The STM32L4+ series delivers a 150DMIPS/409 CoreMark score. The microcontrollers use internal Flash memory and have 640KB SRAM, allowing them to be used in more advanced consumer, medical, and industrial low-power applications and devices.