48 MHz Cortex-M0 with 32 KB flash in a 5x5 mm footprint
The STM32F051K6U6TR: The 32 KB on-chip flash and 8 KB SRAM provide enough headroom for a single control loop, sensor-fusion algorithm, or communication stack in a compact embedded system.
Analog acquisition and industrial connectivity
Thirteen 12-bit ADC channels and a single 12-bit DAC cover analog front-end acquisition and output — enough for a three-phase current-sense plus a setpoint voltage on a motor-drive control board, or for multiplexing several thermistor inputs in a temperature controller. DMA offloads the Cortex-M0 core during high-rate data transfers — the ADC can fill a buffer in SRAM without CPU intervention, leaving the core free for control arithmetic.