DPRAM - DIN, DOUT

Hello,

I still try to configure a Dual Port RAM (Xilinx Spartan-IIE)
I use the CoreGenerator of ISE.

I wonder, why there is a Data Out Port and a Data In Port.
If  I understand things right, data at the IN-port will by visible at
the OUT-port
(in case of configuring a port for READ/WRITE-operation).

Is it true that I have to install two ports ???? I mean - this a big
amount of pins which I have to use, isn't it
16 for DIN and 16 for DOUT?

But if I want to jumper DIN and DOUT I will get a problem, won't I ??
Is there a solution?


Is there someone with experiences with DPRAM's.
If there is an example design - this would be very nice to get it.


Tobias Möglich