Leaflabs Leaf Maple Module 32Bit ARM Development Board Mini Arduino Compatible with ARM STM32

Leaflabs Leaf Maple Module 32Bit ARM Development Board Mini Arduino Compatible with ARM STM32

Specification:  
- Processor: STM32F103RCBT6, 32 bit ARM Cortex-M3 processor
- Dominant frequency: 72 MHz
- 128 KB Flash and 20 SRAM KB
- 34* digital IO ports (GPIOs)
- 12* 16 bit precision PWM ports
- 9* 12 bit precision analog input (ADC) ports
- 2* SPI channels
- 2* I2C channels
- 7* channel direct memory access (DMA) (dma.h)
- 3* USART (serial) channel
- 1* enhanced and 3 general timers
- Through the USB port directly to download the program and communication
- Can be connected to the JTAG
- Nested interrupt vector controller (NVIC) (including external interrupts on the GPIOs)
- Support low power consumption, sleep and standard mode (<500 A)
- Working voltage: 3.3 V
- Input voltage (recommended): 3 V - 12 V
- Size: 2.02 "x 0.72"
- Power supply: USB port or Vin port

GPIO:
- There are 34 input/output pins for Maple Mini, D0-D33. The label on the Mini Maple screen is corresponding to the adjacent port. However, some of them have special uses by default.
- Port D23 is D+ of USB, D24 is D- of USB. If they are used as GPIO, then your program will be the first to disable the USB serial port. But to know, disable the USB serial port means that bootloader will not work as priority, you need to use Bootloader Perpetual to carry out the next update.
- Port D32 is the button port of Mini. So it is mainly used as an input port. When the key is pressed, the port will read to the high level.
- Port D33 is the LED port of Mini. So its main function is to be used as the output port. When the high power is written to it, the LED light will be lit.

Package included:
- 1 x Maple Mnini
- 1 x Compiler software
- 1 x Schematic diagram
- 1 x Chip datasheet