40 Pin GPIO 接口
瑞莎 Cubie A7A 板载 40-Pin GPIO（通用输入输出）接口，为硬件扩展提供了高度灵活的接口支持。
用户可以通过 40-Pin GPIO 接口连接各类传感器、执行器、通信模块、显示屏以及其他嵌入式外设，从而快速实现物联网（IoT）、机器人控制、工业自动化等领域的原型开发与功能验证。
危险
使用 40-Pin GPIO 接口时，请注意引脚和外设的接线，请确保引脚连接正确，不当操作可能导致设备硬件损坏。
GPIO 功能
Cubie A7A 支持给板载的 GPIO 引脚外接外部设备，支持 UART、SPI、I2C、ADC 等。
| FUNC9 | FUNC8 | FUNC7 | FUNC6 | FUNC5 | FUNC4 | FUNC3 | FUNC2 | FUNC1 | Pin# | Pin# | FUNC1 | FUNC2 | FUNC3 | FUNC4 | FUNC5 | FUNC6 | FUNC7 | FUNC8 | FUNC9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| +3.3V | 1 | 2 | +5.0V | ||||||||||||||||
| PJ-EINT23 | TWI11-SDA | TWI3-SDA | TWI7-SDA | UART2-CTS | UART3-RX | PWM1-5 | PJ23 | 3 | 4 | +5.0V | |||||||||
| PJ-EINT22 | TWI11-SCK | TWI3-SCK | TWI7-SCK | UART2-RTS | UART3-TX | PWM1-4 | PJ22 | 5 | 6 | GND | |||||||||
| PB-EINT0 | JTAG-MS | SPI2-CS0 | UART0-TX | UART2-TX | PB0 | 7 | 8 | PB9 | UART0-TX | I2S0-DIN2 | I2S0-DOUBT2 | PWM1-1 | WATCHDOG-SIG | TWI8-SCK | TWI0-SCK | PB-EINT9 | |||
| GND | 9 | 10 | PB10 | UART0-RX | I2S0-DIN3 | I2S0-DOUBT3 | PWM1-2 | PLL-LOCK-DBG | TWI8-SDA | TWI0-SDA | PB-EINT10 | ||||||||
| PB-EINT1 | JTAG-CK | SPI2-CLK | UART0-RX | UART2-RX | PB1 | 11 | 12 | PK0 | MCSIA-D0N | UART6-DCD | I2S4-BCLK | HDMI-CEC | TWI1-SDA | NCSI1-HSYNC | SGPIO-SLOAD | PK-EINT0 | |||
| PL-EINT6 | S-PWM0-4 | S-IR-RX | S-SPI0-MOSI | S-UART0-TX | S-JTAG-DO | PL6 | 13 | 14 | GND | ||||||||||
| PL-EINT7 | S-PWM0-5 | S-SPI0-MISO | S-UART0-RX | S-JTAG-DI | PL7 | 15 | 16 | PJ24 | PWM1-6 | UART4-TX | TWI4-SCK | SPI3-CLK | PJ-EINT24 | ||||||
| +3.3V | 17 | 18 | PJ25 | PWM1-7 | UART4-RX | TWI4-SDA | SPI3-MOSI | PJ-EINT25 | |||||||||||
| PD-EINT12 | PWM1-2 | SPI1-MOSI | EINK-D12 | DSI1-D1P | LVDS1-D1P | PD12 | 19 | 20 | GND | ||||||||||
| PD-EINT13 | PWM1-3 | SPI1-MISO | EINK-D13 | DSI1-D1N | LVDS1-D1N | PD13 | 21 | 22 | PL10 | S-UART0-TX | S-TWI2-SCK | S-UART1-TX | S-PWM0-8 | PL-EINT10 | |||||
| PD-EINT11 | PWM1-1 | SPI1-CLK | EINK-D11 | DSI1-D0N | LVDS1-D0N | PD11 | 23 | 24 | PD10 | LVDS1-D0P | DSI1-D0P | EINK-D10 | SPI1-CS0 | PWM1-0 | PD-EINT10 | ||||
| GND | 25 | 26 | PD14 | LVDS1-D2P | DSI1-CKP | EINK-D14 | SPI1-HOLD | UART3-RTS | PD-EINT14 | ||||||||||
| PD-EINT1 | UART3-RX | TWI2-SDA | EINK-LEH | DSI1-D2N | LVDS1-CKN | PD17 | 27 | 28 | PD16 | LVDS1-CKP | DSI1-D2P | EINK-OEH | TWI2-SCK | UART3-TX | PD-EINT16 | ||||
| PK-EINT5 | JTAG-MAS-CK | NCSI1-D14 | SPI3-CLK | PWM1-9 | PWM1-8 | PCIE-CLKREQN | MCSIA-CKP | PK5 | 29 | 30 | GND | ||||||||
| PK-EINT6 | JTAG-MAS-DO | NCSI1-D13 | SPI3-MOSI | UART2-RTS | UART4-TX | TWI2-SCK | MCSIA-D2N | PK6 | 31 | 32 | PD20 | TWI0-SCK | EINK-CKV | PCIE-CLKREQN | UART4-TX | TWI3-SCK | PWM0-2 | ||
| PK-EINT7 | JTAG-MAS-DI | NCSI1-D12 | SPI3-MISO | UART2-CTS | UART4-RX | TWI2-SDA | MCSIA-D2P | PK7 | 33 | 34 | GND | ||||||||
| PK-EINT2 | SGPIO-SDATAIN | NCSI1-PCLK | TWI5-SDA | HDMI-SDA | I2S4-LRCK | UART6-DTR | MCSIA-D1N | PK2 | 35 | 36 | PK1 | MCSIA-D0P | UART6-DSR | I2S4-MCLK | HDMI-SCL | TWI1-SCK | NCSI1-VSYNC | SGPIO-SCLK | PK-EINT1 |
| PK-EINT8 | JTAG-MAS-NTRST | NCSI1-D11 | SPI3-CS1 | UART2-TX | UART4-RTS | MCSI0-MCLK | MCSIA-D3N | PK8 | 37 | 38 | PK3 | MCSIA-D1P | UART6-RI | I2S4-DIN0 | I2S4-DOUBT1 | TWI5-SCK | NCSI1-MCLK | SGPIO-SDATAOUT | PK-EINT3 |
| GND | 39 | 40 | PK4 | MCSIA-CKN | PCIE-WAKEN | I2S4-DOUBT0 | I2S4-DIN1 | SPI3-CS0 | NCSI1-D15 | JTAG-MAS-MS | PK-EINT4 |