RT8 Pro: Back docking connector
Pogo pin hardware define
Pins 6, 7, 13, 14 are turned OFF by default. These can be turned on via SDK.
| Index | Signal | Description | Index | Signal | Description |
| 1 | GND | GND | 8 | UART_RX | 1.8V UART RXD |
| 2 | GND | GND | 9 | UART_TX | 1.8V UART TXD |
| 3 | GND | GND | 10 | GPIO_1 | 1.8V GPIO 1 Output |
| 4 | GND | GND | 11 | GPIO_2 | 1.8V GPIO 2 Output |
| 5 | GND | GND | 12 | IRQ | 1.8V External Interrupt PIN Input |
| 6 | POGO_5V | 5V/1A DC-DC Power OUT (OFF default) | 13 | POGO_5V | Short to PIN6 |
| 7 | POGO_VBAT | VBAT Power OUT (OFF default) | 14 | POGO_VBAT | Short to PIN7 |
The path can be obtained from the system properties. Each pin has a special attribute key, and the corresponding path can be obtained by calling the system attribute tool through reflection.
POGO_5V
Default value (if not define): sys/devices/platform/soc/soc:pogo_pin/back_vbus_otg_en
POGO_VBAT
Default value (if not define): sys/devices/platform/soc/soc:pogo_pin/rear_vphpwr_en
GPIO_1
Default value (if not define): sys/devices/platform/soc/soc:pogo_pin/back_pogo_gpio1
GPIO_2
Default value (if not define): sys/devices/platform/soc/soc:pogo_pin/back_pogo_gpio2
IRQ
Default value (if not define): sys/bus/platform/devices/soc:pogo_pin/irq_state
Serial
Default value (if not define): /dev/ttyHS1