The STMicroelectronics devices embed high-speed memories (2 Mbytes of Flash memory and 640 Kbytes of SRAM), a flexible external memory controller (FSMC) for static memories (for devices with packages of 100 pins and more), two OctoSPI Flash memories interface (available on all packages) and an extensive range of enhanced I/Os and peripherals connected to two APB buses, two AHB buses and a 32-bit multi-AHB bus matrix. The STM32L4Rxxx devices embed several protection mechanisms for embedded Flash memory and SRAM: readout protection, write protection, proprietary code readout protection and a firewall.

1.71 V to 3.6 V power supply
-40 °C to 85/125 °C temperature range
Batch acquisition mode (BAM)
305 nA in VBAT mode: supply for RTC and 32x32-bit backup registers
33 nA Shutdown mode (5 wakeup pins)
125 nA Standby mode (5 wakeup pins)
420 nA Standby mode with RTC
2.8 μA Stop 2 with RTC
110 μA/MHz Run mode (LDO mode)
43 μA/MHz Run mode (@ 3.3 V SMPS mode)
5 μs wakeup from Stop mode
Brownout reset (BOR) in all modes except shutdown
Interconnect matrix