F-Tile Architecture and PMA and FEC Direct PHY IP User Guide

ID 683872
Date 1/24/2024
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2.1.5. PCIe* Hard IP

The F-tile PCIe* hard IP consists of four PCIe* cores: one x16 (core_0), one x8 (core_1) and two x4 (core_2, core_3). It consists of a set of port bifurcation muxes to remap the four controller PHY interface for PCI Express* (PIPE) lane interfaces to the shared 16 FGT lanes. core_0 can be configured to support x16, x8, and x4 configurations, and core_1 can be configured to support x8 and x4 configurations. core_2 and core_3 only support only x4 configurations.

Figure 6.  PCIe* Hard IP (Gen4, Gen3, Gen2, and Gen1) Configurations
Table 8.   PCIe* Hard IP (Gen4, Gen3, Gen2, and Gen1) Supported Configurations
Configuration Interface Type
1x PCIe* x16 Root port or endpoint and upstream or downstream port
2x PCIe* x8

Endpoint only

Upstream/upstream port

Downstream/downstream port

Endpoint/upstream port

Upstream/downstream port

1x PCIe* x8 Root port or endpoint
4x PCIe* x4 Root port only and upstream or downstream port
2x PCIe* x4 Root port only
1x PCIe* x4 Endpoint only
Table 9.   PCIe* Hard IP Layers by Mode
Mode Transaction Layer Data Link Layer PHY Layer
Full hard IP Yes Yes Yes
Transaction layer packet (TLP) bypass Yes (Lite) Yes Yes