no bidirectional PIO on Stratix III?

thanks for the response especially because it's sunday!

I'm afraid I don't know exactly what you mean. By the time I configure the PIO core in the SPOC builder the configuration of the FPGA pins isn't made yet. This usually happens where the SOPC design is instantiated.

The strange thing is when I switch the FPGA family from Stratix III to Cyclone III in the SOPC builder the "bidirectional" option for the PIO ist there otherwise not.

Is there a difference between the Stratix III pins and the Cyclone III pins I'm too blind to see?