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mmoussea's avatar
mmoussea
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4 years ago

How much negative current can a FPGA Cyclone II user pins I/O can drive ? Sum of pin currents

Hi. How much negative current can a FPGA Cyclone II pin I/O can drive ? I see on documentation that one I/O user pin can drive -24mA. But what about the sum of all negative current currents all...
AminT_Intel's avatar
AminT_Intel
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4 years ago

Hello,

May I know which document are you referring to about I/O pin that can drive -24mA?

Thanks

mmoussea's avatar
mmoussea
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4 years ago

hi, on https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/cyc2/cyc2_cii5v1.pdf

table 5-1 "Absolute maximum rating" : -25mA

On https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/cyc2/cyc2_cii51010.pdf

Programmable current strength : 24mA by default.

My end prupose is that my pins currently drive down to 0V {one resistor, one LED in serial to 3.3V} and wonder if FPGA Cylone II pins can drive -7 mA.

  • AminT_Intel's avatar
    AminT_Intel
    Icon for Regular Contributor rankRegular Contributor
    4 years ago

    Hello,

    Are you referring to -25mA minimum on Iout on Table 5-1? If that is the one you are referring to you cannot set it below -25mA since it may cause permanent damage to your device.

    Thank you.

    • mmoussea's avatar
      mmoussea
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      4 years ago

      Hello.

      I may ask differently :

      Can I drive -7mA per pin (current flow into an output pin), not exceeding -240mA per 8 or 12 pins (depends of banks) ?

      Best regards.

      • AminT_Intel's avatar
        AminT_Intel
        Icon for Regular Contributor rankRegular Contributor
        4 years ago

        Hello,

        Yes, absolutely!

        Thanks