why the tx_serial_data/rx_serial_data of 10G base-R is single ended? Will the quartus insert one diff buf for it if I only use this the single ended tx_serial_data/rx_serial_data as the top pins, then constrain it as lvds signal?
yes, when you assign tx_serial_data/rx_serial_data pin locations and LVDS standart it will automaticaly create differential pairs for tx_serial_data/rx_serial_data pins.
