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SDRAM vs DDR2 on Spartan3E

Hi all,

I am considering to replace a SDRAM with a DDR2 on a custom Spartan3E1200 board to gain some bandwidth in a Microblaze system. Currently I am working with OPB_SDRAM core and I am not satisfied with

60MB bandwidth in burst mode (x16 SDRAM and 50MHz clock). It takes 4 cyles to read a word (32bits) and it does not support async clocking, so OPB clock is the same as RAM clock. I wonder what can I expect if I use x16 DDR2 RAM coupled to MCH_OPB_DDR2 (power consumption, bandwidth, problems...).

Cheers,

Guru

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Guru
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you may have better luck using DDR memory, the DDR controller is little better in performance then the SDRAM IP core from xilinx. going with DDR2 on S3E I would not advice unless you really know what you are doing (and then you would not ask about it..)

Antti

Reply to
Antti

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