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Altera_Forum's avatar
Altera_Forum
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12 years ago

A question about Cyclone iv configuration voltage

Hi,

I have a question about configuration pins voltage choice. please help me.

The configuration pins of the Cyclone IV I use is located at Bank3, which also includes DDR2 pins. So I set the bank3 IO voltage to 1.8V. However,the MSEL pins is required to set 2.5V,3.0V,or 3.3V in AS fast mode in handbook.

What voltage level the MSEL pin should set?

3 Replies

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

    Thank you for your reply.

    The AS mode in Table 8-4 just includes 3.3,3.0,and 2.5V, not lists 1.8V, however, the note 1 said that Configuration voltage standard applied to the VCCIO supply of the bank in which the configuration pins reside.

    I am confused whether 1.8V is feasible or not.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    9 years ago

    Have you solved this confusion? I get the same problem.