STM32F100RET6BTR — 24 MHz Cortex-M3 with 512 KB Flash for industrial control
The STM32F100RET6BTR is a 32-bit ARM Cortex-M3 microcontroller from STMicroelectronics' STM32F1 value line, clocked at 24 MHz with 512 KB of Flash program memory and 32K x 8 of SRAM. It integrates a rich set of peripherals — DMA, multiple power-management modes (PDR, POR, PVD), a temperature sensor, and a watchdog timer — alongside connectivity options including I²C, SPI, UART/USART, IrDA, and LINbus. With 51 general-purpose I/Os and dual 12-bit DACs plus a 16-channel 12-bit ADC, this part is built for sensor fusion, motor-control feedback, and human-machine interface tasks in industrial automation, building control, and medical equipment where moderate processing speed and deterministic response are required.
24 MHz core — what it means for the control loop
At 24 MHz, the Cortex-M3 executes most single-cycle instructions, giving a raw throughput of about 24 MIPS. That is enough for a PID loop at a few kHz or Modbus RTU polling.
Industrial temperature range and package
Rated for -40 to 85 °C, this MCU suits factory-floor enclosures and outdoor telecom cabinets. The 64-LQFP package (10x10 mm) is a common footprint for mid-density MCUs.