The 40-QFN package with exposed pad (5x5 mm) keeps the board footprint compact while the pad aids thermal transfer in enclosed or convection-limited enclosures.
Peripheral set and memory — sizing the firmware and I/O budget
With 28 KB of Flash and 2 KB of RAM, this part fits control loops, state machines, and moderate data logging without external memory. The 10-bit ADC (28 external channels plus two internal) covers analog sensing — temperature, current, voltage feedback — common in motor drives and power supplies. Brown-out detect, POR, and the watchdog timer are on-chip, reducing external supervisor IC count.