I am having problems programming the FPGAs I have on board. Well I have two FPGAs on board a XC3s400 (Spartan 3) and xc2s200e (Spartan 2e) on board. I have no problems creating the .mcs form the 2 bit files and then using the impact to program......Its just that the FPGAs are not getting programmed.The Done pin remains low....
What could be the reason behind this...
Prompt reply appreciated....
Regards,
- Shailesh
"Shai" schrieb im Newsbeitrag news: snipped-for-privacy@g49g2000cwa.googlegroups.com...
something is wrong obviously, can be many reasons..
can you program the FPGA over jtag? does the done pin go high ok? ...then read all the docs about the chain config all over one more and check that everything is ok
done not high, is generic error, can be wiring, wrong mode, wrong mcs file anything..
antti
The programming pins as well as the usual IOpins do have rather thight powerup specifications. For the families, I'm working with, TMS and TDI require a pullup, TCLK requires a pulldown. One open input (before configuration) can dramatically increase power consumption beyond the abailty of your powersupply if it was designed a bit thight.
Have a long look at the datasheet.
Rene
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