Description

STM32F103CBT6 Mini ARM Cortex-M3 Controller Board Module

 

Details with Pictures

Product Forum

http://www.stm32duino.com/

Specifications:

Processor: STM32F103RCBT6, 32 ARM Cortex-M3 processors

Frequency: 72 MHz

128 KB Flash and 20 KB SRAM

34 digital IO ports (GPIOs)

12 16-bit PWM ports

9 analog input (ADC) ports

2 SPI channels

2 I2C channels

7-channel direct memory access (DMA) (dma.h)

3 USART (serial) channels

Enhanced and three general-purpose timers

Direct download of communication programs via USB port

One external JTAG

Nested Vectored Interrupt Controller (NVIC) (including GPIOs for external interrupts)

Supports low-power, sleep, and standard modes (<500 μA)

Operating voltage: 3.3 V

Input voltage (recommended): 3 V – 12 V V

Dimensions: 2.02″ x 0.72″

The Maple Mini has 34 input/output pins, numbered D0 through D33. The Maple Mini on-screen labels correspond to the ports and their adjacent pins. However, some of them have special default uses.
D23 is USB port D+, and D24 is USB port D-. If you use them as GPIO, your program will first disable the USB ports. However, as you know, disabling the USB serial bootloader negates its priority, requiring you to perform the next update through the Perpetual Bootloader.

Port D32 is the mini push button port. Therefore, it functions primarily as an input port. When pressed, the magnetic port will read a high level.

Port D33 is the mini LED port. Therefore, its primary function is as an output port. When written high, the LED will illuminate.