the question about Whether the pin polarities of the FPGA are interchangeable PN

[gongmh]

Hello，

I use the FPGA:10AS032E2F29I2SG designing the schematics, 

When the PCB is routed, the P-N polarity of the serdes needs to be changed.

But I'm not sure if it supports it? Can you tell me? Is there any documentation?

you can see more from the picture.

Regards，

gongmh

[EthanLi · Accepted solution]

Hi gongmh,

There is an option RX Polarity Inversion in the Transceiver PHY IP which can invert the data input in the instance generated by this IP. You should enable the polinv port at the same time. And the polinv port will have bit width equal to number of channels used. It is used to invert P and N of data lines, but not clock.

Please refer to :https://www.intel.com/content/www/us/en/docs/programmable/683617/21-1/rx-polarity-inversion.html

Thanks,

Ethan