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Altera_Forum's avatar
Altera_Forum
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15 years ago

I/O standard of cyclone III device EP3C55 bank 1

Hi,

I am using cyclone iii device EP3C55, and assigned pins(DDR2-SDRAM) in bank 1 to sstl-18 class i I/O standard, but Quartus II shows the error messages like this:

error: I/O bank 1 cannot select VCCIO of 1.8V which is required for pin DDR2_ADDR[2] with I/O standard SSTL-18 Class I

error: VCCIO 1.8V is not compatible with the VCCIO requirement of the I/O bank 1 imposed by the selected configuration scheme

Can't pins in bank 1 be assigned to SSTL-18 CLASS I I/O standard?

Thank you!

7 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    --- Quote Start ---

    I guess, you are using AS configuration scheme, that also uses B1?

    --- Quote End ---

    Actually yes, isn't it right? what kind of AS configuration scheme shall I use? Thanks.
  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    If you are using AS, B1 must supplied by 3.3V (at least with EPCSxx chips).

  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    Hey guys,

    Even I faced the same problem, the bank 1 is set to 1.8 v for my memory signals, what I need to do now?

    I tried changing configuration but it leads to another error as follows

    Error: Can't place multiple pins assigned to pin location Pin_D2 (IOPAD_X0_Y22_N21)

    Info: Pin mem_addr[12] is assigned to pin location Pin_D2 (IOPAD_X0_Y22_N21)

    Info: Pin ~ALTERA_ASDO_DATA1~ is assigned to pin location Pin_D2 (IOPAD_X0_Y22_N21)

    Actually this error can be avoided by setting all Dual purpose pins to "Use as regular I/Os" in device options when using Active Serial Configauration(AS) but for other configurations even I set them to use as regular I/Os Quartus is erroring out, Can you help me.
  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    As I konw, you can avoid the error by the way you mentioned even you're not using AS.

    Make sure that you have set all Dual purpose pins to "Use as regular I/Os".
  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    I am sure that I set all of them to "Use as regular I/Os" but still Quarus is producing the error as shown below(Selected configuration other than AS)

    Error: Can't place multiple pins assigned to pin location Pin_F3 (IOPAD_X0_Y17_N14)

    Info: Pin mem_we_n is assigned to pin location Pin_F3 (IOPAD_X0_Y17_N14)

    Info: Pin ~ALTERA_DCLK~ is assigned to pin location Pin_F3 (IOPAD_X0_Y17_N14)

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