24 MHz Cortex-M3 — the cost-optimised workhorse
This is the part you pick when the application needs a capable 32-bit core but doesn't need the 72 MHz throughput of the STM32F103 — the speed ceiling is the deliberate cost/performance trade-off that keeps the BOM in check for industrial control, sensor hubs, and motor-drive interface boards.
Peripherals and connectivity — what is on the bus
On-chip peripherals include DMA, a programmable voltage detector (PVD), power-on reset (POR), a temperature sensor, and a watchdog timer. The data converter block packs 16 channels of 12-bit ADC and two channels of 12-bit DAC — enough for analog sensor readout and a control output without an external converter.