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Altera_Forum's avatar
Altera_Forum
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10 years ago

Using both SDRAM of DE2-115

I've read that the DE2-115 board has two SDRAM chips.. I've used one of this (sdram_control_4port) to store the odd and even lines of the tv decoder i've used using Verilog. My problem now is that i need another storage for the processing of my image and i dont know how i can use the other SDRAM. Can anyone help me with this? Thank you in advance.

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  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    10 years ago

    The two devices share all their control signals (with the exception of their data mask 'DQM' signals). So, the two SDRAM devices are always accessed together.

    There is a 32-bit data bus split across the two devices - 16-bits per device. Use of the data mask could result in 1, 2, 3 or 4 bytes being written/read during any single access.

    How wide is the data bus that you're currently using? Are you sure you've only "used one"?

    Cheers,

    Alex