Whenever i power on my spartan board the led associated with the supply votages (I.E 3.3 Volt 5 Volt) as well as all the output leds start blinking.what could be the reason for that?
From personal experience, I can tell you that if you accidentally use a DC adapter that outputs a higher voltage than is specified, the power LED will blink on a Xilinx Spartan development board. In my case, going back to the proper charger stopped the blinking. Unfortunately the overvoltage had damaged something else on the board and it was no longer functional.