A
Alt Torsten
Guest
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)
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)