ALGIZ RT8 Back docking connector

Press a button

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 OUT
vBat [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

Was this article helpful?
No