A000073 Arduino, A000073 Datasheet - Page 2

• Manufacturer Part Number: A000073
• Description: Development Boards & Kits - AVR ARDUINO UNO SMD REV 3
• Manufacturer: Arduino

Specifications of A000073

• Rohs: yes
• Product: Development Kits
• Tool Is For Evaluation Of: ATmega328
• Core: AVR8
• Interface Type: I2C, ICSP, SPI, USB
• Data Bus Width: 8 bit
• For Use With: ATmega

SRAM
EEPROM
Clock Speed
Schematic & Reference Design
EAGLE files:
Schematic:
Power
The Arduino Uno can be powered via the USB connection or with an external power supply.
The power source is selected automatically.
External (non-USB) power can come either from an AC-to-DC adapter (wall-wart) or
battery. The adapter can be connected by plugging a 2.1mm center-positive plug into the
board's power jack. Leads from a battery can be inserted in the Gnd and Vin pin headers of
the POWER connector.
The board can operate on an external supply of 6 to 20 volts. If supplied with less than 7V,
however, the 5V pin may supply less than five volts and the board may be unstable. If using
more than 12V, the voltage regulator may overheat and damage the board. The
recommended range is 7 to 12 volts.
The power pins are as follows:
Memory
The ATmega328 has 32 KB (with 0.5 KB used for the bootloader). It also has 2 KB of SRAM
and 1 KB of EEPROM (which can be read and written with the
Input and Output
Each of the 14 digital pins on the Uno can be used as an input or output, using pinMode(),
digitalWrite(), and
receive a maximum of 40 mA and has an internal pull-up resistor (disconnected by default)
of 20-50 kOhms. In addition, some pins have specialized functions:
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VIN. The input voltage to the Arduino board when it's using an external power
source (as opposed to 5 volts from the USB connection or other regulated power
source). You can supply voltage through this pin, or, if supplying voltage via the
power jack, access it through this pin.
5V. The regulated power supply used to power the microcontroller and other
components on the board. This can come either from VIN via an on-board regulator,
or be supplied by USB or another regulated 5V supply.
3V3. A 3.3 volt supply generated by the on-board regulator. Maximum current draw
is 50 mA.
GND. Ground pins.
Serial: 0 (RX) and 1 (TX). Used to receive (RX) and transmit (TX) TTL serial data.
These pins are connected to the corresponding pins of the ATmega8U2 USB-to-TTL
Serial chip.
arduino-uno-smd-schematic.pdf
arduino-uno-smd-reference-design.zip
digitalRead()
2 KB (ATmega328)
1 KB (ATmega328)
16 MHz
functions. They operate at 5 volts. Each pin can provide or
EEPROM
library).