Algiz RT8 Back docking connector
Last updated: 2025-05-15
Related products: Algiz RT8
| 1 | GND | Ground PIN | 8 | UART_RX | 1.8V UART RXD |
| 2 | GND | Ground PIN | 9 | UART_TX | 1.8V UART TXD |
| 3 | USB_DM | USB 2.0 bus Data – | 10 | GPIO_1 | 1.8V GPIO 1 |
| 4 | USB_DP | USB 2.0 bus Data + | 11 | GPIO_2 | 1.8V GPIO 2 |
| 5 | USB_ID | USB 2.0 OTG ID PIN | 12 | IRQ | 1.8V External Interrupt PIN |
| 6 | VBUS_5V | 5V/500mA Power OUT(OFF default) | 13 | NA | NA |
| 7 | VBAT | vBat/500mA Power OUTvBat [3.5V – 4.3V](OFF default) | 14 | NA | NA |
Pin5: USB_ID
Input 0: OTG mode, host mode
Input 1: non-OTG mode, client mode
Pin6: VBUS_5V
/sys/class/ext_dev/function/ext_dev_5v_enable
Output 1: Enable 5V output
Output 0: Close 5V output
Pin7: VBAT
/sys/class/ext_dev/function/ext_dev_3v3_enable
Output 1: Enable 3.3V output
Output 0: Close 3.3V output
Pin10: GPIO_1
/sys/class/ext_dev/function/pin10_en
Output 1: Pull high
Output 0: Pull low
Pin11: GPIO_2
/sys/class/ext_dev/function/pin11_en
Output 1: Pull high
Output 0: Pull low
Pin12: IRQ
You can use below device node to get Pin12 status:
/sys/class/ext_dev/function/irq_state
Read 1: Pin12 is high
Read 0: Pin12 is low
Pin8-Pin9: UART_RX, UART_TX
/dev/ttyHSL1