A000052 Arduino, A000052 Datasheet - Page 3

• Manufacturer Part Number: A000052
• Description: Development Boards & Kits - AVR ARDUINO LEONARDO W/O HEADERS
• Manufacturer: Arduino

Specifications of A000052

• Rohs: yes
• Product: Evaluation Boards
• Tool Is For Evaluation Of: ATmega32u4
• Core: AVR
• Interface Type: USB
• Operating Supply Voltage: 7 V to 12 V
• Data Bus Width: 10 bit
• For Use With: ATmega32u4

Power
The Arduino Leonardo can be powered via the micro 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:
Summary
Microcontroller
Operating Voltage
Input Voltage (recommended) 7-12V
Input Voltage (limits)
Digital I/O Pins
PWM Channels
Analog Input Channels
Memory
The ATmega32u4 has 32 KB (with 4 KB used for the bootloader). It also has 2.5 KB of SRAM and 1 KB of EEPROM (which can be read and written with the
EEPROM
Input and Output
Each of the 20 digital i/o pins on the Leonardo can be used as an input or output, using pinMode(), digitalWrite(), and
volts. Each pin can provide or receive a maximum of 40 mA and has an internal pull-up resistor (disconnected by default) of 20-50 kOhms. In addition, some pins
Revision 11-1-2012





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.
IOREF. The voltage at which the i/o pins of the board are operating (i.e. VCC for the board). This is 5V on the Leonardo.
library).
ATmega32u4
5V
6-20V
20
7
12
To view the latest information, visit
DC Current per I/O Pin
DC Current for 3.3V Pin
Flash Memory
SRAM
EEPROM
Clock Speed
http://www.arduino.cc/
40 mA
50 mA
32 KB (ATmega32u4) of which 4 KB used by bootloader
2.5 KB (ATmega32u4)
1 KB (ATmega32u4)
16 MHz
digitalRead()
functions. They operate at 5
3