When connecting to PC, program the firmware to ATMEGA 16U2-MU. In most case, ICSP is the AVR，an Arduino micro-program header consisting of MOSI, MISO, SCK, RESET, VCC, and GND.
Reference voltage (0-5V) for analog inputs. The pin labeled “〜” can be used to generate PWM. Or used as digital output pin to drive different modules like LED, relay, etc. These pins can be configured as digital input pin to read the logic value (0 or 1). If LED is off, connection is wrong.Īrduino UNO has 14 digital input/output pins (of which 6 can be used as PWM outputs). Powering the Arduino, LED on means that your circuit board is correctly powered on. When connecting to PC, program the firmware to ATMEGA328P-PU. In fact, slave the output devices under the SPI bus host. It is often called the SPI (serial peripheral interface) and can be considered an "extension" of the output. ICSP (In-Circuit Serial Programming) Header Here is an explanation chart of what every element and interface of the board does: 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.If this is your first experience tinkering with the platform, the UNO is the most robust board you can start playing with.ģ2 KB (ATmega328) of which 0.5 KB used by bootloader The UNO is the best board to get started with electronics and coding. Instead, it features the Atmega16U2 programmed as a USB-to-serial converter. The Uno R3 differs from all preceding boards in that it does not use the FTDI USB-to-serial driver chip. Note that the two ICSP headers are separately used to program the firmware to ATMEGA16U2-MU and ATMEGA328P-PU, but generally the two chips have been programmed well. 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.
It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, 2 ICSP headers and a reset button. Keyestudio Uno R3 is a microcontroller board based on the ATmega328 (datasheet), fully compatible with ARDUINO UNO REV3.
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