Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Cyclone 3 migration from EPCS64 to EPCS128

Hello all, In our design, we are using successfully the EP3C10 and EPCS64 configuration device (AS mode). We need to switch to the 128Mbit device (EPCS128); the FPGA fail to config in that case:...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

After nCONFIG is release, here is what is observed:

- Status register of the flash is read;

- Flash Electronic signature is read (128Mbit device do not respond to this command)

- First 80 bytes (approx) of RBF are read (it looks like a key surrounded by FFs)

- nSTATUS is assert to indicate a failure

We hope that there is something in the key that we could be set in Quartus that tells the configuration state machine to ignore the flash ID.