72 MHz Cortex-M3 with 384 KB Flash — what the density buys you
The STM32F103RDT6: It packages 51 general-purpose I/O lines, a 16-channel 12-bit ADC, and a 2-channel 12-bit DAC, plus a CANbus interface and USB connectivity — a peripheral set that targets industrial control, motor-drive, and aftermarket automotive applications where a single-chip controller needs both sensor acquisition and fieldbus communication. The 384 KB Flash is the mid-density option in the STM32F103 line, suitable for a real-time control stack with a communication protocol plus a bootloader.
Peripheral set and package
The STM32F103RDT6 includes DMA, multiple PWM timers with dead-time insertion for motor control, a temperature sensor, and a watchdog — the usual STM32F103 complement.