It carries 192 KB of Flash program memory, 20 KB of SRAM, and an integrated 6 KB EEPROM for nonvolatile parameter storage — enough for a firmware image with a modest data logger or calibration tables without an external serial EEPROM.
Memory headroom for a firmware engineer
With 192 KB of Flash and 20 KB of SRAM, the STM32L071CZT6TR sits in the mid-range of the STM32L0 family. The 6 KB of embedded EEPROM is a useful differentiator — it saves an external serial EEPROM for calibration constants or configuration data that must survive a firmware update. The 32 MHz Cortex-M0+ core handles moderate control loops and protocol stacks without breaking a sweat, though the flash wait state needs to be set to 1 when the system clock exceeds 16 MHz to avoid a hard fault on the first branch.
The brown-out detect and POR circuits keep the core from running in an undefined state during power ramps.