DDR2 and Ethernet

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You can put your code+data into internal memory (probably tightly coupled) while still using the external DDR2 memory for large items (like the ethernel buffers).

However you may have to be careful about the size of the code.

I don't know how small the TCP/IP stack can be, but even the 'hello world' program pulls in enough stuff from libc to be a little large for internal memory.

My suspicion is that the IP stack won't be that concise! Enough code to send IPv4 UDP packets should be quite small, but you'll need something to give the system it's IP address.

OTOH if you avoid all of libc, you can do quite useful stuff using internal memory.

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hi, dsl:

you mean I can use the on-chip memory if ....? Could you give me more guidance according the spec. of cyciii and my project ?