Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

error in the address width of CFI in sopc builder

Hi,everyone,please forgive my poor English!

I use the Quartus II 9.1 in windows xp.In the sopc builder,I set the address width(bits) of flash memory interface as 22 .Then ,in the .bdf file of the project the address width is 23 (address_to_the_cfi_flash[22..0]).

I don't know what's wrong,how can I do this right?

2 Replies

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

    So you are using 16bit Flash, right?

    The address from sopc builder is BYTE ADDRESS, and the address of you flash chip is WORD ADDRESS.

    Simply throw the A0 from your nios module away, connect them like this:

    Your Nios Module Flash Chip

    A1 A0

    A2 A1

    ...

    ...

    A22 A21