Cartft FLEETPC-ARM-300 Reference Manual page 18

PCF8574 pin
2
(I C3 = 22H)
3G_PWR_ON
WIFI_PWR_ON
UART_PWR_ON
CAN_PWR_ON
USB_PWR_ON
GPS_PWR_ON
LAN_PWR_ON
GPIO2_21
There is limitation on using GPIO to turn on/off peripherals power supply. Incorrect use of
GPIO could result to malfunction of peripherals or unstable system.
Please contact us for information on using the GPIOs.
Functions
3G/LTE modem power on/off
WiFi/Bluetooth power on/off
COM2/COM3 power on/off
CAN bus power on/off
USB HUB power on/off
GPS module power on/off
LAN port power on/off
Connect to IO2 connector
(pin 18) via photo-coupler
FLEETPC-ARM-300 Series
I/O
OUT
OUT
OUT
OUT
OUT
OUT
OUT
IN
18
Page
Linux Name
/sys/class/gpio/gpio240
/sys/class/gpio/gpio241
/sys/class/gpio/gpio242
/sys/class/gpio/gpio243
/sys/class/gpio/gpio244
/sys/class/gpio/gpio245
/sys/class/gpio/gpio246
/sys/class/gpio/gpio247