The 32-UFQFPN package with exposed pad (5x5 mm) keeps the footprint compact for space-constrained PCBs.
Memory sizing — what fits and what doesn't
With 8 KB of Flash, this part targets firmware under about 6.5 KB after bootloader and interrupt vector overhead. The 1 KB SRAM handles a modest stack and a few frame buffers — enough for a UART command parser or a PID loop with 32-bit coefficients. The 640-byte EEPROM is useful for calibration constants, fault logs, or node addresses that survive a firmware update. If your application needs over-the-air image storage or a large lookup table, you'll need to step up to a higher-density STM8S variant.