I'm working in a project using MCF51JE256. Now i need send data through a ethernet port (RJ-45, socket conection), is it possible do this using this MCU?
Anything is possible. You could add an external Ethernet controller to the Mini-FlexBus. You might be able to find a USB-connected Ethernet adaptor. But you can't get Ethernet on that chip without external hardware. Any "non-standard" solution would make the software a lot harder to get working.
The only MCF51 chip with Ethernet is the MCF51CN128. That has half the FLASH, less than half the RAM and a different mix of peripherals to the one you're using (no USB for instance).
You may need to step up to an MCF52 series chip.
Then you'll need a lot of extra software to get the network stack (e.g. FNET) unless you're already using something like MQX.
You can do this with MCF51CN256 , I have implemented SPI to Ethernet bridge in my application using MCF51CN128.
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