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Altera_Forum
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16 years ago

Cyclone III configuration problem

Hi I am using EPCS16 to configure Cyclone III EP3C25E device in AS mode. I load the pof configuration file into EPCS16 using external Speedpro 3000A third party programmer (JTAG is not used at all). ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

I have got all the I/Os having 3.3v voltage now. But the configuration is sitll incorrect. The nconfig pin stays high all the time and nstatus, conf_done and ncs always stay low. I did not even see a clock toggling at the DCLK pin. Can someone plz tell me what could cause the problem? I double check the ground plane of the FPGA and have it connected to the ground pins.