Is the nCONFIG pin on the MAX 10 (10M02SCE144) input only?

Hi Anand, Thanks for your reply and pardon me for reacting so slow! I need to ask more about this as we still don’t know if the nCONFIG pin are input only or bidirectional. You answered that it is input only in user mode (I agree on that) but we can still find information in the documents you refer to that can be interpreted as if the nCONFIG pin is bidirectional. Please find two enclosed screenshots from the documents you pointed out to us. In the “Capture_Intel_pcg-01018.jpg” screenshot of page 7: * The table says the nCONFIG pin is an “Input, I/O”. As we know that it is input only when in user mode one can therefore think it is I/O (input and/or output) in configuration mode. * The Connection guideline says “connect directly or through a pull-up resistor to VCC”. Connecting directly to VCC hints the nCONFIG pin is never an output going low. In the “Capture_Intel_ug_m10_config.jpg” screenshot of Figure 10 (chapter 2.3.1) on page 28: * After the “Read ICB Settings” box it says “nSTATUS and nCONFIG released high”. This can be interpreted as nSTATUS and nCFONFIG pins are both bidirectional because we know that nSTATUS is bidirectional. So, can you please answer these two questions: * Is the nCONFIG pin always an input or can it ever be an output? * Is the nCONFIG pin ok to drive with a regular totem-pole output gate? Sorry for being so stupid. Regards, /Gunnar Alm