https://docs.amd.com/v/u/en-US/xapp1179-tandem-config-pcie
Using Tandem Configuration for PCIe in the Kintex-7 Connectivity TRD Application Note (XAPP1179) -...
This application note describes the use of the Tandem PROM and the Tandem PCIe configuration methods with the Kintex-7 Connectivity Targeted Reference Design...