HiI have just received a CycloneIII 3c120 Dev kit. When I try to load a configuration (*.sof) through USB Blaster, Quartus II gives the following messages: Info: Started Programmer operation at Tue Aug 23 15:18:56 2011 Error: Can't access JTAG chain Error: Operation failed Info: Ended Programmer operation at Tue Aug 23 15:18:57 2011 All switches are according to the documentation. But I can't load any design Help much appreciated
HelloAfter experimenting and looking at the different documents, I changed the SW3.4 to 0 and then could program the device. In the "User Guide", the information tells SW3.4 on, in the "Reference Manual" it tells, that SW3.4 should be off. (Max-enable off). So, it seems, that the problem is solved. But the documentation is not clear. Am I wrong?