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Altera_Forum's avatar
Altera_Forum
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15 years ago

Problem in pin assignment

Hi,

I m new with Quartus and I have project with CycloneIII.

The problem is when I try to connect the SSRAM it seems that not all pins indicated in the reference manual are assignable (eg: in the manual FPGA pin's A16 must be connected to sram A[2] but in the assignment this pin A16 is unavailable because it's dedicated to VCCIO7).

What can I do to connect the SSRAM?

Thanks.

5 Replies

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

    check under device settings in Quartus that this pin is not a dual purpose pin and assigned to the VCCIO rather then regular I/O

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

    Don't rely on the manual for pin assignments, Altera usually makes errors in those. Look at the board schematics instead.

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

    --- Quote Start ---

    Don't rely on the manual for pin assignments, Altera usually makes errors in those. Look at the board schematics instead.

    --- Quote End ---

    be sure to file an SR and let Altera know about incorrect manuals. and also look at the Golden Top file which should have correct pin assignments done for you. :eek: