NoticeIteaduino Nano
Contents
Overview
Iteaduino Nano is a small, complete, and breadboard-friendly board based on the Arduino Nano 3.0. 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 Micro USB cable instead of a standard one.
Spec
| Microcontroller | Atmega328 |
| Operating Voltage | 5V |
| POWER Supply Voltage(recommended) | 7~12V |
| Power supply Max Voltage | 12V |
| Digital IO pins | 20 |
| Analog Input pins(ADC) | 8 |
| DC Output current on per IO lines | 40mA |
| Flash Memory | 32 KB of which 2 KB used by boot loader |
| SRAM | 2 KB |
| EEPROM | 1KB |
| Clock frequency | 16 MHz |
| Dimension | 43.18X17.78X1.6mm |
Hardware top view
Power
The Iteaduino Nano can be powered via the Micro-B USB connection, 6-12V unregulated external power supply (pin 30), or 5V regulated external power supply (pin 27). The power source is automatically selected to the highest voltage source. The DP2102 chip on the Nano is only powered if the board is being powered over USB.
Memory
The ATmega328has 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(), anddigitalRead() functions. They operate at 5 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 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 DP2102 Serial chip.
- External Interrupts: 2 and 3. 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 11. Provide 8-bit 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: 13. There is a built-in LED connected to digital pin 13. 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. 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.
