Qunqi Leonardo R3 development Board Microcontroller ATmega32u4 for arduino + USB Cable leonardo R3 Input Voltage: 7-12V,Operating Voltage:5V,SRAM:2.5 KB (ATmega32u4) leonardo R3 Flash Memory: 32 KB (ATmega32u4) of which 4 KB used by the bootloader leonardo R3 PWM channel: 7 (D3, D5, D6, D9, D10, D11, D13) leonardo R3 Analog Input Channels:12(A0-A5, D4-A6, D6-A7, D8-A8 ,-A9 D9, D10-A10, D12-A11) leonardo R3 Digital IO port: 22 (D0-D13, D14-MISO D15-SCK, D16-MOSI D18-23 [A0-A5) 1. Controller: ATmega32u4 2. goods recorded: 16 MHz 3. Operating voltage: 5V 4. Input Voltage (recommended) :7-12V 5. Digital IO port: 22 (D0-D13, D14-MISO D15-SCK, D16-MOSI D18-23 [A0-A5) 6. PWM channel: 7 (D3, D5, D6, D9, D10, D11, D13) 7. analog input: 12 (A0-A5, D4-A6, D6-A7, D8-A8 ,-A9 D9, D10-A10, D12-A11) 8. 5V digital / analog port maximum permissible current: 40 mA 9. 3.3V digital / analog port maximum permissible current: 50 mA 10. Flash Memory: 32 KB (ATmega32u4) of which 4 KB used by the bootloader 11. SRAM: 2.5 KB (ATmega32u4) 12. EEPROM: 1 KB (ATmega32u4 1x Board 1x Cable