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Altera_Forum's avatar
Altera_Forum
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20 years ago

can I add another tristate slave port?

hello everyone.

I have found Dm9000 device driver in the forum from niosIIuser. But it used tristate slave port.

In my project, tristate port has been shared by sram, flash, sdram and lcd. There is no pin expanded from the same tristate port, so I can't use tristate port as an interface to my dm9000 board.

Is it possible that add another tristate slave port in my system?

3ks so much...

1 Reply

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

    --- Quote Start ---

    originally posted by match@Aug 28 2005, 01:14 AM

    in my project, tristate port has been shared by sram, flash, sdram and lcd. there is no pin expanded from the same tristate port, so i can't use tristate port as an interface to my dm9000 board.

    --- Quote End ---

    Can you elaborate on this? I don't know what you mean by "no pin expanded".

    I found a Davicom data sheet that makes it look a lot like the LAN91C111 chip. It's got an interesting address bus; apparently, it decodes the address itself. It looks like interfacing would be very similar to the LAN91C111 interface, where you give it its own 10-bit address space.

    --- Quote Start ---

    originally posted by match@Aug 28 2005, 01:14 AM

    is it possible that add another tristate slave port in my system?

    --- Quote End ---

    Yes. Look under "Bridges" in SOPC builder for "Avalon Tristate Bridge".