Forum Discussion

CFabr1's avatar
CFabr1
Icon for New Contributor rankNew Contributor
3 years ago

LED circuit issue with CPLD and Quartus

Hi all, I'm trying to implementing under Quartus this simple LED circuit (based on two D flip-flops) using a +5V CPLD (EPM7032) As you can see, there are only three signals inputs to the ...
ShengN_altera's avatar
ShengN_altera
Icon for Super Contributor rankSuper Contributor
3 years ago

Hi,

Tested with no problem as well.

Check the image and folder attached.

Thanks,

Best regards,

Sheng

p/s: If any answer from the community or Intel Support are helpful, please feel free to give best answer or rate 4/5 survey.

  • CFabr1's avatar
    CFabr1
    Icon for New Contributor rankNew Contributor
    3 years ago

    I see.

    Anyway, OPT01 and OPT13 are active LOW signal so, normally they are fixed HIGH and then get asserted to LOW for 2.5us.As well as, LED_CATHODE1 and LED_CATHODE2 shoud be fixed HIGH so that the LEDs will not blink because both anodes are wired to +5V thru 220 Ohm resistors.Therefore, the LEDs should blink only when LED_CATHODE1 and LED_CATHODE2 toggle to LOW.