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UNO R3 Development Board Microcontroller for Arduino
Brand No Model UNO R3 Quantity 1 Color Black + blue Material Heavy gold plate Features Using ATMega 16U2 microcontroller Specification Micro controller: 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: 16MHz Application Learning board; development board English Manual/Spec http://arduino.cc/en/Main/Software Other Stitching changes: beside the AREF sutural are two extra I2C pins (SDA and SCL which are copy of Analog 4 and 5£¬ not additional I2C interface). Beside the RESET also are two extra pins£¬ one is IOREF which supports the extension board stand load voltage. The stitching just shows extension board the current on-board voltage. The other one is backup placeholder pins. The RESET circuit is more stable. RESET button position is changed£¬ and moved to near the USB interface of voids£¬ which is more convenient. ATmega16U2 replaced 8U2£¬ but it does not mean that the 16k flash of R3 can make your code run faster. This upgrade works to the USB interface chip£¬ which enables UNO simulate USB HID in theory£¬ such as MIDI/Joystick/Keyboard. Packing List 1 x Development board 1x USB cable (61cm)