Forum Discussion

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

mk_target_board

Hi,

I have created a custom board with mk_target_board command as stated under:

"Porting the Nios II Flash Programmer to Custom Boards" of the Nios II Flash Programmer User Guide - document version 1.1

CFI-Flash: AM29DL640D

Target Board: Altera PCI Development Board, Stratix (EP1S25)

I have specified:

address size: 22 bits

data size: 16 bits

but the block diagram shows address size of 23 bits (address[22..0]).

How can I correct this?

Thanks

3 Replies

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

    Hi,

    If your 29DL640D flash is 16-bit data bus, just use CFI ADDR[1..22] to map to your flash device A[0..21]. Leave CFI ADDR[0] unused.

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

    --- Quote Start ---

    originally posted by liangyi@Oct 1 2005, 02:17 AM

    hi,

    if your 29dl640d flash is 16-bit data bus, just use cfi addr[1..22] to map to your flash device a[0..21]. leave cfi addr[0] unused.

    liangyi

    <div align='right'><{post_snapback}> (index.php?act=findpost&pid=10083)

    --- quote end ---

    --- Quote End ---

    Thanks for your reply

    you mean leave cfi_addr[0] from the sopc generated block diagram unconnected?

    By the way, do you happen to know what is the setup, wait and hold time for this flash device?

    I have setup: 35

    wait: 130

    hold: 35

    Thanks again
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    21 years ago

    Hi,

    > You mean leave cfi_addr[0] from the sopc generated block diagram unconnected?

    Yes.

    > By the way, do you happen to know what is the setup, wait and hold time for this flash device?

    I think the default values are jusk OK. You can try.

    Regards,

    LiangYi