can't we connect ethernet connector directly to M4 controllers without using ethernet fiji?
Probably not unless the Cortex M4 has an Ethernet MAC onboard. You would know if the datasheet says you can connect the cable directly to the processor. Do you have the datasheet? Have you read it? Can you provide a link?sorry, my point is M4 controller means cortex m4 controller family like stm32 or lpc54608 etc...
Good point -- forgot about the magnetics.M4 does have MAC & PHY if vendor chooses to use it from ARM.
So yes, with appropriate magnetics you can connect Ethernet to M4.
https://www.embedded.com/electronic...CUs-boast-ARM-Cortex-M4-with-Ethernet-MAC-PHY
Regards, Dana.