72 MHz Cortex-M3 with 256 KB Flash — the workhorse MCU for industrial control
This is the mid-density member of the STM32F103 line, balancing processing throughput and memory for motor drives, PLCs, and industrial sensor hubs.
Peripheral set and analog integration
On-chip peripherals include DMA controllers, a motor-control PWM timer, and a full set of watchdog and power-management blocks (PDR, POR, PVD). Connectivity covers CANbus, I²C, SPI, UART/USART, USB, and IrDA — enough to handle fieldbus gateways and multi-protocol interfaces without external transceivers.