Banana Pi Nano
Banana pi Nano replacement for Raspberry pi Nano
The BPI-Nano board is a small, complete, and breadboard-friendly board based on the ATmega328 (same Nano 3.0), It has more or less the same functionality of the Duemilanove. It lacks only a DC power jack and works with a Mini-B USB cable instead of a standard one.
Input and Output
| Serial | 0（RX）、1（TX），Used to receive (RX) and transmit (TX) TTL serial data. These pins are connected to the corresponding pins of the FTDI USB-to-TTL Serial chipea |
| 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 |
| PWM output | BPI-NANO have 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 |
| L13 | 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 |
| I2C | 4 (SDA) and 5 (SCL). Support I2C (TWI) communication using the Wire library (documentation on the Wiring website) |
BPI-NANO can power with a MicroUSB port， PH2.0 port, and VIN port.
Power-dependent pins are as follows：
PH2.0 port： can input 7-12V，It can be controlled by a power switch.
5V：5V power PIN。when use USB power，direct output USB supplied 5V voltage；When using external power supply, output 5V voltage after voltage stabilization.
3V3：3.3V power output PIN,output Max is 50 mA.
VIN：Connect to external dc 5V power supply
REF：I/O reference voltage. Other devices can identify the development board I/O reference voltage through this pin.
Hardware Specification of Banana pi Nano
Microcontroller | ATmega328P |
Operating Voltage | 5V |
Input Voltage: (recommended) | 7-12V |
Input Voltage: (limits) | 6-20V |
Digital I/O Pins | 14(include 6 PWM output) |
PWM PIN | 6个 |
Analog Input Pins | 6个 |
I/O output Max | 20mA |
3.3V output Max | 50mA |
| ATmega328P @16 MHz. | |
| 32 KB Flash. | 32KB(ATmega328P) and 0.5KB used by the bootloader |
| 2 KB SRAM. | 2KB(ATmega328P) |
| 1 KB EEPROM | 1KB(ATmega328P) |