hi,
i found the problem. but i don't know how resolve it.
the problem is in xc2c64a cpld. CE (chip enable) of xcf04 platform flash is controlled by xc2c64a cpld. but cpld is don't select the flash. CE (pin 10 of xcf04) is high. i manually drive low CE pin of flash and press PROG button board is running from platform flash. i think cpld configuration may be changed. i download original cpld configuration file from xilinx reference designs. i try load to cpld but impact is give an error like "chip id is don't match". how i load original cpld configuration file to xc2c64a?
thanks...