Hei,
i try to configure an APEX20K400E with the passive parallel asynchronous configuration scheme but at a certain point in the configuration phase the FPGA signals an error by pulling nSTATUS low. To locate the error i counted the number of transfered bytes and i saw the following. For the same configuration file (.rbf) the FPGA signals every time the error at a certain point. That point varies from configuration to configuration file. For one file it stops always after 4000 bytes, for another after
170.000 bytes and for a third one after 20.000. I tried it as well with two different FPGAs from the same type. The result is the same. The timing and the signal levels i've checked according to the Altera documentation.
Cheers, Torsten
PS: Using Quartus 3.0 SP2 to create a raw binary file (.rbf)