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This STM32F103C8T6 minimum system board, commonly known by enthusiasts as the Blue Pill, is built around ST's STM32F103C8T6 microcontroller, which uses the 32-bit ARM Cortex-M3 core. The listing describes it as a budget-friendly board designed for learners studying STM32 microcontrollers, and its bare-bones minimum system design keeps the layout simple and the cost low.
Running at a 72MHz work frequency, the board offers considerably more processing headroom than typical 8-bit microcontroller boards in a similar price range, while still being simple enough for someone new to ARM-based development to get started with.
Onboard memory includes 64K of flash and 20K of SRAM, enough for many small to medium embedded control projects. The board runs on 2.0 to 3.6V I/O logic levels and includes power-on reset and power-down reset (POR/PDR) circuitry, along with a 4 to 16MHz crystal for clock generation.
An onboard Mini USB interface supplies both power and a USB connection to the board, so getting started needs only a standard Mini USB cable, though note that many STM32F103 boards of this style need a separate ST-Link or similar programmer connected to the SWD pins for flashing firmware, since the USB port alone does not necessarily provide a bootloader-based upload path unless one has been flashed onto the chip already.
Students and hobbyists moving from 8-bit microcontrollers into ARM Cortex-M development, or anyone who wants a low-cost STM32 board to experiment with peripherals like timers, ADCs and communication buses, will find this a practical starting point.
ST's STM32F103C8T6, based on the ARM Cortex-M3 core.
72MHz.
64K of flash and 20K of SRAM.
2.0 to 3.6V I/O, with power-on and power-down reset circuitry.
Through an onboard Mini USB interface.
| Brand | Generic |
|---|---|
| Flash Memory | 64K |
| MCU / Processor | STM32F103C8T6 (ARM Cortex-M3) |
| RAM | 20K |
| Selling unit | PCS |
