72 MHz ARM Cortex-M3 with 512 KB Flash — the sweet spot of the STM32F1 line
It packs 80 I/Os in a 100-pin LQFP package, making it a dense I/O option for industrial control, motor drives, and communication gateways that need parallel buses, multiple UARTs, and CAN connectivity without stepping up to a larger BGA.
80 I/Os and 16 ADC channels — analog and digital headroom
With 80 I/Os and 16 multiplexed 12-bit ADC channels plus two 12-bit DACs, this MCU handles multi-sensor acquisition and analog output without external converters. The peripheral set includes DMA, motor-control PWM, a temperature sensor, and watchdog timers — enough for a single-chip motor drive or a fieldbus node with CAN and USB.