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Altera_Forum's avatar
Altera_Forum
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12 years ago

EPM3032ALC44-10N Settings for Quartus II

Hi, I'm a first time user of the Altera CPLD chip EPM3032ALC44-10N and Quartus II software. I have a design that doesn't use all the I/O's. I am also driving HCT cmos chips with the EPM3032A outputs. In the Quartus software settings to program the chip I would like to know what the optimum settings for unused I/O's and what voltage to set at.

From the "Assignments" Menu, clicking "Device" from the dropdown. I have the MAX3000A family selected with the "Available Device" set to EPM3032ALC44-10. Then selecting "Device and Pin Options" it's the "Unused Pins" and "Voltage" setting that I am referring to. I have the "Unused Pins" set to "As input tristated" and the "Voltage" set to "3.3-V LVTTL". Could anyone confirm that these setting should work with the HCT cmos chips I am using and the EPM3032?

Thanks for any help.

~jimmy

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    12 years ago

    Your settings are appropriate.

    You could also use "As input tri-stated with weak pull-up" if that device family supports a weak pull-up.

    HCT logic levels are TTL logic levels, so the 3.3V MAX output levels will be compatible with the HCT input logic levels.

    Cheers,

    Dave
  • Altera_Forum's avatar
    Altera_Forum
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    12 years ago

    Ok good, my voltage level is set right. I didn't see the "As input tri-stated with weak pull-up" as an option for the EPM3032 CPLD so I guess leave it "As input tristated".

    Thanks for the quick reply Dave!
  • Altera_Forum's avatar
    Altera_Forum
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    12 years ago

    --- Quote Start ---

    I didn't see the "As input tri-stated with weak pull-up" as an option for the EPM3032 CPLD so I guess leave it "As input tristated".

    --- Quote End ---

    Yep, that'll work fine.

    Cheers,

    Dave