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Altera_Forum's avatar
Altera_Forum
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14 years ago

I/O default problem

Hi,

I'm working with DE0 development board. When I'm trying to compile my code i get the following message:

"Error: Pin SFL:epromldr|altserial_flash_loader:altserial_flash_loader_component|\GEN_ASMI_TYPE_2:asmi_inst~ALTERA_DCLK is incompatible with I/O bank 1. It uses I/O standard 2.5 V, which has VCCIO requirement of 2.5V. That requirement is incompatible with bank's VCCIO setting or other output or bidirectional pins in the bank using VCCIO 3.3V".

When I switched to"2.5V (default)" in the pin planner the problem will not appear. I what the I/O to be 3.3V LVTTL. how can I change that?

If I delete the "flash loader" from my code the compilation should be o.k.

(Of Corse, I need the flash loader in order to load my program after power up…)

Idan

4 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    The pin is a part of the I/O bank.

    If u whant to apply these setting to one pin of the bank u need to apply it to the whole bank.

    This bank is set to 2,5V so u need to change all the pins to 3,3V
  • Altera_Forum's avatar
    Altera_Forum
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    14 years ago

    All DE0 IO banks are powered by 3.3V. Also the serial flash needs 3.3V. Sounds like you have set an 2.5V IO standard where it shouldn't be.

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

    I tried to change all of the pin's (in Pin Planner), but it didn't help…

    What else can I do?
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    14 years ago

    I guess, you have an incorrect setting of 2.5V somewhere in the device assignments. Because DE0 has an I/O voltage of 3.3V for all banks, there must be no 2.5V setting.