I have a Xilinx/Digilent Spartan-3E starter kit Rev D (with 46V32M16
-6T F). Is there any *simple* demo that stores a picture bitmap in the builtin DDR SDRAM and sends the bitmap to the VGA port continously ..?
Is it correct that the DDR SDRAM won't go below 75 MHz due the DLL used ..? (Micron indicate that SDRAM can go as low as a few kHz in clock frequency if needed)
I had a look at 3 Xilinx examples, but they seem almost more complicated to get running than to code a sdram controller by myself. Currently trying out opencores controller, but it seems to get stuck synthesis.
What voltage is Vtt supposed to have for ddr sdram?, Is every resistor needed, or can one do with a simpler interface if the dram fpga path is less than 1 inch/2 cm ..?