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New Contributor

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...

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Regular Contributor

4 years ago

Hello,

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

Thanks

mmoussea
New Contributor
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
  Regular 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
    New Contributor
    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.