The NanoPi Fire3 is a 7.5cm x 4cm Microcontroller (slightly larger than a Raspberry Pi Zero) using a 1.4GHz Octa-Core Cortex-A53 with 1GB DDR3 RAM, with its CPU being a S56818 (Samsung) SoC. The Fire3 has a CMOS interface to support cameras, 40-Pin GPIO, MicroHDMI, RGB LCD Connector, and Gbps Ethernet.
It can run FriendlyCore, Debian, Android and Armbian.
While it claims to be, the Fire3's GPIO is actually not compatible with the Raspberry Pi, notably the I2C bus is different.
Pin# | Name | Pin# | Name |
1 | SYS_3.3V | 2 | VDD_5V |
3 | I2C0_SDA | 4 | VDD_5V |
5 | I2C0_SCL | 6 | DGND |
7 | GPIOD8/PPM | 8 | UART3_TXD/GPIOD21 |
9 | DGND | 10 | UART3_RXD/GPIOD17 |
11 | UART4_TX/GPIOB29 | 12 | GPIOD1/PWM0 |
13 | GPIOB30 | 14 | DGND |
15 | GPIOB31 | 16 | GPIOC14/PWM2 |
17 | SYS_3.3V | 18 | GPIOB27 |
19 | SPI0_MOSI/GPIOC31 | 20 | DGND |
21 | SPI0_MISO/GPIOD0 | 22 | UART4_RX/GPIOB28 |
23 | SPI0_CLK/GPIOC29 | 24 | SPI0_CS/GPIOC30 |
25 | DGND | 26 | GPIOB26 |
27 | I2C1_SDA | 28 | I2C1_SCL |
29 | GPIOC8 | 30 | DGND |
31 | GPIOC7 | 32 | GPIOC28 |
33 | GPIOC13/PWM1 | 34 | DGND |
35 | SPI2_MISO/GPIOC11 | 36 | SPI2_CS/GPIOC10 |
37 | AliveGPIO3 | 38 | SPI2_MOSI/GPIOC12 |
39 | DGND | 40 | SPI2_CLK/GPIOC9 |