Kind of signal the interconnect carries, for example eth for Ethernet. Choose the protocol that matches the interfaces you connect. Cannot be changed later.
-
CAN(value:'can') -
UART(value:'uart') -
I2C(value:'i2c') -
SPI(value:'spi') -
GPIO(value:'gpio') -
USBH(value:'usbh') -
ETH(value:'eth')