A000005

A000005 Datasheet

Part	Datasheet
A000005	A000005 (pdf)

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ARDUINO NANO Code: The Arduino Nano is a compact board similar to the UNO. The Arduino Nano is a small, complete, and board based on the ATmega328 Arduino Nano 3.x . It has more or less the same functionality of the Arduino Duemilanove, but in a different package. It lacks only a DC power jack, and works with a USB cable instead of a standard one. Getting Started You can find in the Getting Started section all the information you need to configure your board, use the Arduino Software IDE , and start tinker with coding and electronics. TECH SPECS Microcontroller Architecture Operating Voltage Flash Memory SRAM Clock Speed Analog I/O Pins EEPROM DC Current per I/O Pins Input Voltage Digital I/O Pins PWM Output Power Consumption PCB Size Weight Product Code ATmega328 AVR 5V 32 KB of which 2 KB used by bootloader 2 KB 16 MHz 8 1 KB 40 mA I/O Pins V 22 6 19 mA 18 x 45 mm 7g • OSH Schematics The Arduino Nano is hardware! You can build your own board using the following files: EAGLE FILES IN .ZIP SCHEMATICS IN .PDF Power The Arduino Nano can be powered via the USB connection, unregulated external power supply pin 30 , or 5V regulated external power supply pin The power source is automatically selected to the highest voltage source. Memory The ATmega328 has 32 KB, also with 2 KB used for the bootloader. The ATmega328 has 2 KB of SRAM and 1 KB of EEPROM. Input and Output Each of the 14 digital pins on the Nano can be used as an input or output, using pinMode , digitalWrite , and digitalRead functions. They operate at 5 volts. Each pin can provide or receive a maximum of 40 mA and has an internal resistor disconnected by default of kOhms. In addition, some pins have specialized functions: • 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 FTDI Serial chip. • External Interrupts 2 and These pins can be configured to trigger an interrupt on a low value, a rising or falling edge, or a change in value. See the attachInterrupt function for details. • PWM 3, 5, 6, 9, 10, and Provide PWM output with the analogWrite function. • SPI 10 SS , 11 MOSI , 12 MISO , 13 SCK . These pins support SPI communication, which, although provided by the underlying hardware, is not currently included in the Arduino language. • LED There is a LED connected to digital pin When the pin is HIGH value, the LED is on, when the pin is LOW, it's off. The Nano has 8 analog inputs, each of which provide 10 bits of resolution i.e. 1024 different values . By default they measure from ground to 5 volts, though is it possible to change the upper end of their range using the analogReference function. Analog pins 6 and 7 cannot be used as digital pins. Additionally, some pins have specialized functionality: • I2C 4 SDA and 5 SCL . Support I2C TWI communication using the Wire library documentation on the Wiring website . There are a couple of other pins on the board: • AREF. Reference voltage for the analog inputs. Used with analogReference . • Reset. Bring this line LOW to reset the microcontroller. Typically used to add a reset button to shields which block the one on the board. Communication The Arduino Nano has a number of facilities for communicating with a computer, another Arduino, or other microcontrollers. The ATmega328 provide UART TTL 5V serial communication, which is available on digital pins 0 RX and 1 TX . An FTDI FT232RL on the board channels this serial communication over USB and the FTDI drivers included with the Arduino software provide a virtual com port to software on the computer. The Arduino software includes a serial monitor which allows simple textual data to be sent to and from the Arduino board. The RX and TX LEDs on the board will flash when data is being transmitted via the FTDI chip and USB connection to the computer but not for serial communication on pins 0 and A SoftwareSerial library allows for serial communication on any of the Nano's digital pins. The ATmega328 also support I2C TWI and SPI communication. The Arduino software includes a Wire library to simplify use of the I2C bus. To use the SPI communication, please see ATmega328 datasheet. Programming The Arduino Nano can be programmed with the Arduino software download . Select "Arduino Duemilanove or Nano w/ ATmega328" from the Tools > Board menu according to the microcontroller on your board . The ATmega328 on the Arduino Nano comes preburned with a bootloader that allows you to upload new code to it without the use of an external hardware programmer. It communicates using the original STK500 protocol. You can also bypass the bootloader and program the microcontroller through the ICSP Serial Programming header using Arduino ISP or similar. Automatic Software Reset Rather then requiring a physical press of the reset button before an upload, the Arduino Nano is designed in a way that allows it to be reset by software running on a connected computer. One of the hardware flow control lines DTR of the FT232RL is connected to the reset line of the ATmega328 via a 100 nanofarad capacitor. When this line is asserted taken low , the reset line drops long enough to reset the chip. The Arduino software uses this capability to allow you to upload code by simply pressing the upload button in the Arduino environment. This means that the bootloader can have a shorter timeout, as the lowering of DTR can be with the start of the upload. This setup has other implications. When the Nano is connected to either a computer running Mac OS X or Linux, it resets each time a connection is made to it from software via USB . For the following or so, the bootloader is running on the Nano. While it is programmed to ignore malformed data i.e. anything besides an upload of new code , it will intercept the first few bytes of data sent to the board after a connection is opened. If a sketch running on the board receives configuration or other data when it first starts, make sure that the software with which it communicates waits a second after opening the connection and before sending this data.

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ARDUINO NANO

Code:

The Arduino Nano is a compact board similar to the UNO.

The Arduino Nano is a small, complete, and board based on the ATmega328 Arduino Nano 3.x . It has more or less the same functionality of the Arduino Duemilanove, but in a different package. It lacks only a DC power jack, and works with a USB cable instead of a standard one.

Getting Started

You can find in the Getting Started section all the information you need to configure your board, use the Arduino Software IDE , and start tinker with coding and electronics.

TECH SPECS

Microcontroller Architecture Operating Voltage Flash Memory SRAM Clock Speed Analog I/O Pins EEPROM DC Current per I/O Pins Input Voltage Digital I/O Pins PWM Output Power Consumption PCB Size Weight Product Code

ATmega328 AVR 5V 32 KB of which 2 KB used by bootloader 2 KB 16 MHz 8 1 KB 40 mA I/O Pins V 22 6 19 mA 18 x 45 mm 7g
• OSH Schematics

The Arduino Nano is hardware! You can build your own board using the following files:

EAGLE FILES IN .ZIP SCHEMATICS IN .PDF

Power

The Arduino Nano can be powered via the USB connection, unregulated external power supply pin 30 , or 5V regulated external power supply pin The power source is automatically selected to the highest voltage source.

Memory

The ATmega328 has 32 KB, also with 2 KB used for the bootloader. The ATmega328 has 2 KB of SRAM and 1 KB of EEPROM.

Input and Output

Each of the 14 digital pins on the Nano can be used as an input or output, using pinMode , digitalWrite , and digitalRead functions. They operate at 5 volts. Each pin can provide or receive a maximum of 40 mA and has an internal resistor disconnected by default of kOhms. In addition, some pins have specialized functions:
• 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 FTDI Serial chip.
• External Interrupts 2 and These pins can be configured to trigger an interrupt on a low value, a rising or falling edge, or a change in value. See the attachInterrupt function for details.
• PWM 3, 5, 6, 9, 10, and Provide PWM output with the analogWrite function.
• SPI 10 SS , 11 MOSI , 12 MISO , 13 SCK . These pins support SPI communication, which, although provided by the underlying hardware, is not currently included in the Arduino language.
• LED There is a LED connected to digital pin When the pin is HIGH value, the LED is on, when the pin is LOW, it's off.

The Nano has 8 analog inputs, each of which provide 10 bits of resolution i.e. 1024 different values . By default they measure from ground to 5 volts, though is it possible to change the upper end of their range using the analogReference function. Analog pins 6 and 7 cannot be used as digital pins. Additionally, some pins have specialized functionality:
• I2C 4 SDA and 5 SCL . Support I2C TWI communication using the Wire library documentation on the Wiring website .

There are a couple of other pins on the board:
• AREF. Reference voltage for the analog inputs. Used with analogReference .
• Reset. Bring this line LOW to reset the microcontroller. Typically used to add a reset button to shields which block the one on the board.

Communication

The Arduino Nano has a number of facilities for communicating with a computer, another Arduino, or other microcontrollers. The ATmega328 provide UART TTL 5V serial communication, which is available on digital pins 0 RX and 1 TX . An FTDI FT232RL on the board channels this serial communication over USB and the FTDI drivers included with the Arduino software provide a virtual com port to software on the computer. The Arduino software includes a serial monitor which allows simple textual data to be sent to and from the Arduino board. The RX and TX LEDs on the board will flash when data is being transmitted via the FTDI chip and USB connection to the computer but not for serial communication on pins 0 and A SoftwareSerial library allows for serial communication on any of the Nano's digital pins. The ATmega328 also support I2C TWI and SPI communication. The Arduino software includes a Wire library to simplify use of the I2C bus. To use the SPI communication, please see ATmega328 datasheet.

Programming

The Arduino Nano can be programmed with the Arduino software download . Select "Arduino Duemilanove or Nano w/ ATmega328" from the Tools > Board menu according to the microcontroller on your board . The ATmega328 on the Arduino Nano comes preburned with a bootloader that allows you to upload new code to it without the use of an external hardware programmer. It communicates using the original STK500 protocol. You can also bypass the bootloader and program the microcontroller through the ICSP Serial Programming header using Arduino ISP or similar.

Automatic Software Reset

Rather then requiring a physical press of the reset button before an upload, the Arduino Nano is designed in a way that allows it to be reset by software running on a connected computer. One of the hardware flow control lines DTR of the FT232RL is connected to the reset line of the ATmega328 via a 100 nanofarad capacitor. When this line is asserted taken low , the reset line drops long enough to reset the chip. The Arduino software uses this capability to allow you to upload code by simply pressing the upload button in the Arduino environment. This means that the bootloader can have a shorter timeout, as the lowering of DTR can be with the start of the upload. This setup has other implications. When the Nano is connected to either a computer running Mac OS X or Linux, it resets each time a connection is made to it from software via USB . For the following or so, the bootloader is running on the Nano. While it is programmed to ignore malformed data i.e. anything besides an upload of new code , it will intercept the first few bytes of data sent to the board after a
connection is opened. If a sketch running on the board receives configuration or other data when it first starts, make sure that the software with which it communicates waits a second after opening the connection and before sending this data.

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived A000005 Datasheet file may be downloaded here without warranties.

Datasheet ID: A000005 518278