MAX 10: Clamping diodes for configuration IOs

Hi,

It is a recommendation to protect the device against the overshoot.With out the diode also design will work fine but due to power fluctuation device may damage in long term point of view.

Yes, IOs are having clamping diode which is also optional and can be controlled.

FIG:2 IOE Structure https://www.altera.com/documentation/sam1393999966669.html#sam1394000084476

Pin connection Guideline https://www.altera.com/en_us/pdfs/literature/dp/max-10/pcg-01018.pdf

Let me know if you need any further assistance.

Best Regards,

Anand Raj Shankar

(This message was posted on behalf of Intel Corporation)