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IDeGu's avatar
IDeGu
Icon for New Contributor rankNew Contributor
5 years ago

Altera DE-10-Nano UART Rx and Tx in Pin Planner

Hi there, I'm doing a NIOSII tutorial but I got stuck to the UART pins assignment in the Quartus Pin Planner. Specifically I have to connect the Rx and Tx to their respective pins. Since I ha...
Deshi_Intel's avatar
Deshi_Intel
Icon for Regular Contributor rankRegular Contributor
5 years ago

HI,

Looking at your Table 3-17 screen shot, UART pins should be assigned to 3.3V IO standard but your pin planner UART pins are still configured to 2.5V IO standard

Try to correct the IO standard setting in pin planner.

Another thing to take note is one FPGA IO Bank can only accept one type of IO standard.

  • For instance, you can't have one IO bank that has some pins assigned to 2.5V IO standard and some pins assigned to 3.3V IO standard.

Thanks.

Regards,

dlim

IDeGu's avatar
IDeGu
Icon for New Contributor rankNew Contributor
5 years ago

Hi dlim,

thank you for your answer. You have a good point, as I missed the I/O Standard Voltage column: well spotted.

Unfortunately the result does not change and still I have the error message "Editing location assignment is not successful. Not assignable" . At this point I am wondering if I am supposed to assign the UART pins or if it is done automatically.

I would appreciate more inputs if you spot something else, please :)

Thank you again,

Iggy