AN 778: Intel® Stratix® 10 L-Tile/H-Tile Transceiver Usage

ID 683086
Date 6/24/2022
Document Table of Contents TX PLL Restrictions when Using PCIe*

Intel® recommends driving the remaining channels of the L-tile by ATX PLL if 4 or more channels of PCIe* are used at Gen2 or Gen3 speeds. Using ATX PLL to drive these channels helps achieve better performance. Intel® Quartus® Prime issues a critical warning if fPLL is used to drive the remaining channels.