How can i use the tse ip core with qsys?

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Sorry to be vague, but basically, you need to do more reading and understanding of what you are trying to accomplish.

If you're using a NIOS, you need memory. And usually if you're using a NIOS, you like to see it's console printf's on a UART.

If you're using ethernet, the packet data needs to be read/written somewhere, and usually that is also memory.

How much you can or cannot remove from the reference examples is going to depend on what IP blocks you are going to replace it with or what functionality you are going to remove.

Good luck!

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Thank you always!I am referring to the NiosII Ethernet Standard Design with cycloneIII device.As far as i know,It seems that the sgdma ip core which is used for transmiting and recieving data is needed for ethernet.Is it right?It uses the on-chip memory for sdgma descriptors, uses the ddr2 controller for sgdma memory controller and use external flash for niosii.But i am confused about how can i use ssram or flash on my board to replace it correspondingly,becasue there is no presets for the chip on my board.So what should i do?I am trying to use ddr2 for both niosii memory and for sdgma?Is it ok?thank you!