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Keyestudio UNO R3 Board for Arduino - Black + Yellow
Keyestudio UNO R3 BOARD Overview: Keyestudio Uno R3 is a microcontroller board based on the ATmega328 (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs)£¬ 6 analog inputs£¬ a 16MHz ceramic resonator£¬ a USB connection£¬ a power jack£¬ an ICSP header£¬ and a reset button. It contains everything needed to support the microcontroller; simply connect it to a computer with a USB cable or power it with a AC-to-DC adapter or battery to get started. The Uno R3 differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip. Instead£¬ it features the Atmega16U2 programmed as a USB-to-serial converter. Uno R3 of the board has the following new features: 1.0 pinout: added SDA and SCL pins that are near to the AREF pin and two other new pins placed near to the RESET pin£¬ the IOREF that allow the shields to adapt to the voltage provided from the board. In future£¬ shields will be compatible with both the board that uses the AVR£¬ which operates with 5V and with the Arduino Due that operates with 3.3V. The second one is a not connected pin£¬ that is reserved for future purposes. Stronger RESET circuit. Atmega 16U2 replace the 8U2. Summary Microcontroller ATmega328 Operating Voltage 5V Input Voltage (recommended) 7~12V Input Voltage (limits) 6-20V Digital I/O Pins 14 (of which 6 provide PWM output) Analog Input Pins 6 DC Current per I/O Pin 40 mA DC Current for 3.3V Pin 50 mA Flash Memory 32 KB (ATmega328) of which 0.5 KB used by bootloader SRAM 2 KB (ATmega328) EEPROM 1 KB (ATmega328) Clock Speed 16 MHz Length 68.6 mm Width 53.4 mm Weight 25g. 1.Microcontroller core: AVRmega328P-PU ( Processing speed 20MIPS); 2. Working voltage: +5V; 3. External input voltage+7V~+12Vsuggest; 4. External input voltage ( extremum ): +6V Vin 20V; 5. Digital signal I/O interface: 14 ( 6 PWM input interface); 6. Analog signal input interface: 6; 7. DC I/O interface current: 40mA; 8. Flash capacity: 32KB( other 2k used in hootloader); 9. SRAM static storage capacity; 10. EEPROM storage capacity: 512bytes; 11. Clock frequency: 16MHz.