i am using altera cpld.using quartus 2 tool to programme it through byte blaster cable. I have installed drivers for the cable.made connections intact. i am getting error as "Unable to scan device." My assusmption was may be because of loose contacts this error was coming.but connections are intact.supply are proper,still i cann't programme cpld. is there any possibility of jtag port of cpld being damaged? i had programmed the cpld through the same method.but today i am not able to programme it,nor erase cpld.what the functionality cpld do have stored in it,still there.
waiting for some suggestions.
Thanks Mohan