Hi All,
I'm debugging a board with a Cyclone IV device where the CONF_DONE pin was inadvertently left floating. The FPGA configures fine over JTAG but when configuring from EPCS it reads the whole configuration from the EPCS and then toggles nStatus and starts over. Once upon a time I think there was an option to get the FPGA to ignore CONF_DONE but it doesn't seem to be there anymore in 12.1SP1. I've checked all the usual stuff (MSEL pins set correctly, etc) and the only suspicious thing I can find is the floating CONF_DONE pin. Does anyone know if this will scupper configuration from EPCS?
Thanks,
Mark.
I'm debugging a board with a Cyclone IV device where the CONF_DONE pin was inadvertently left floating. The FPGA configures fine over JTAG but when configuring from EPCS it reads the whole configuration from the EPCS and then toggles nStatus and starts over. Once upon a time I think there was an option to get the FPGA to ignore CONF_DONE but it doesn't seem to be there anymore in 12.1SP1. I've checked all the usual stuff (MSEL pins set correctly, etc) and the only suspicious thing I can find is the floating CONF_DONE pin. Does anyone know if this will scupper configuration from EPCS?
Thanks,
Mark.