Leaf Maple Mini ARM Board with STM32F103RCBT6 (Cortex-M3, 72 MHz)
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Prices updated: 12 Oct 2026
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About this product
The Leaf Maple Mini is a compact ARM development board built around the STM32F103RCBT6 32-bit Cortex-M3 microcontroller running at 72 MHz. It offers 128 KB flash, 20 KB SRAM, 34 GPIO pins, PWM, ADC, SPI, I2C and USART interfaces, plus a dedicated USB port for programming and communication. It suits embedded projects and learning STM32 development.
Specifications
- MCU
- STM32F103RCBT6 (ARM Cortex-M3)
- Clock speed
- 72 MHz
- Flash memory
- 128 KB
- SRAM
- 20 KB
- GPIO pins
- 34
- PWM channels
- 12 (16-bit)
- Analog inputs (ADC)
- 9 (12-bit)
- Onboard regulator output
- 500 mA at 3.3 V
Frequently asked questions
How do I program the Leaf Maple Mini?
Use the dedicated USB port for programming and communication. You need a toolchain that supports the Maple Mini board, and the STM32 ecosystem tools are commonly used for this MCU family.
Can I connect 5 V sensors directly to its pins?
The MCU works at 3.3 V logic levels, so do not connect 5 V signals directly. Use a level shifter for 5 V devices, and check the datasheet for which pins are 5 V tolerant.
