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Altera_Forum's avatar
Altera_Forum
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17 years ago

PIN Connections to SSRAM

Hi,

I am using Nios II Embedded evaluation Kit (Cyclone III) (EP3C25F324C6)..

My Intension is to read and write data to /from the SSRAM on the board ... in byte manner

Now I have to use SRAM_D0-SRAM_D1 pins to configure the device (SSRAM) to read the data from the SSRAM...

So ,I changed in the device settings (User IO).. to use those pins as user IO . But even then I am unable to get the last byte value correctly..

So, Please suggest me how to use those pins correctly ...

Please help me out of this issue ..

Waiting for a reply ..

Thanks,

Srinath.

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    17 years ago

    Did you understand the cotrol timing requirements of SSRAM from the datasheet?

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

    Hi,

    I understood the tiings from the datasheet, but while reading I am unable to read the eaxct data which I have given.

    As mentioned earlier I am getting the error valus for the fianl byte/

    Is there any solution for this issue.

    Thanks,

    Srinath.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    17 years ago

    Check whether Byte enables are playing any role in your code. Also, when you say last byte, Do u mean last byte of data that is written to SRAM? What Size{in Bytes} of data have you tried writing to SRAM?

    I really wonder whether last byte is written properly or not!!:mad:

    To confirm.Try this out:

    Write data in multiple bursts linearly and read linearly to observe whether the last byte of every burst is missed out/ not!