STM32F103C8T6 Development Board (Maple Mini / Blue Pill)

A Maple Mini style board for STM32 learners

This STM32F103C8T6 development board follows the Maple Mini style layout, built around the same STM32F103C8T6 chip found on other minimum-system boards in this line, using the ARM Cortex-M3 32-bit core. It is aimed at learners and developers working on IoT, robotics and embedded systems projects who want an Arduino-compatible route into ARM Cortex-M3 development.

The chip runs at a 72MHz working frequency, powered from 2.0 to 3.6V, and includes a 4 to 16MHz crystal oscillator alongside an embedded 8MHz RC oscillator as an internal clock option, giving some flexibility in how the clock tree is configured for a given project.

Memory, I/O and power management

Onboard memory is 64K bytes of flash program memory and 20K bytes of SRAM, and clock generation runs through a CPU clock PLL. The board exposes 37 quick I/O ports with 16 external interrupt lines, single-cycle multiply and hardware divide support for faster math operations, and a programmable voltage monitor for keeping an eye on supply conditions.

Power-saving is handled through sleep, stop and standby modes, useful for battery-powered or low-duty-cycle projects, and debugging uses the standard SWD (serial wire debug) interface, which most common ARM programmers and debug probes support.

Who it suits

Students and hobbyists moving up from 8-bit microcontroller boards into ARM Cortex-M3 development, particularly those already comfortable with an Arduino-style workflow, will find this Maple Mini style layout a practical and low-cost entry point.

Questions buyers ask

What core does it use?

An ARM Cortex-M3 32-bit core running at 72MHz.

How much memory does it have?

64K bytes of flash program memory and 20K bytes of SRAM.

How many I/O ports does it have?

37 quick I/O ports with 16 external interrupt lines.

Does it support low-power modes?

Yes, sleep, stop and standby modes are supported.