08-25-2009 05:09 AM
I'm experiencing problems with a new board, the Spartan XC3S200A is not configured by the XCF02S PROM. I'm not completely new to this so I think I did the PROM file and the programming correctly but last time I had to get a similar cuircuit up and running was a few years ago. The FPGA can be programmed in IMPACT and then runs as expected but it isn't loaded on startup by the PROM obviously. The first thing I checked and found strange is that the Mode[0:2] Pins have HIGH level although open at the moment. They should be all '0' to load from that PROM right ? The regarding pins are used as outputs later on but I even removed that from the design. Later they will be connected so some driver IC but it isn't soldered yet so they're open. So why could they be high ? They're also read as '1' when reading the status register.
Does anyone have an idea ?
Thank you very much for every hint,
08-25-2009 10:40 PM