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VT-SBC-RK3568-NT | User Manual 20
3.1
Interface Definition
3.1.1
UART
VT-SBC-RK3568-NT offers 5 UART ports on the GPIO header. UART0, UART4, UART7, and
UART8 are used for serial communication, corresponding to nodes ttyS0, ttyS4, ttyS7, and
ttyS8. UART2 is used for serial debugging.
Please use a USB to TTL (3.3V) cable to connect the Board and the host when using UART2
for device debugging. You are recommended to set the baud rate to 150000bps.
When using the UART ports for serial communication, you can execute the following
commands to test the port status.
Send data (“TEST”) to the port and receive the data.
# echo
TEST
> /dev/
ttyS6
# cat /dev/
ttyS6
&
The port cannot receive and transmit data at the same time.
UART8
UART0
UART4
UART7
UART2
