Flexible High Speed I/O

Flexible Input/Output (I/O) is a technology that allows the High Speed I/O (HSIO) lanes to be configured for connection to a Gigabit Ethernet (GbE) Controller, a PCIe* Controller, an Extensible Host Controller Interface (xHCI) USB 3.2 Controller, or an Advanced Host Controller Interface (AHCI) SATA Controller. Flexible I/O enables customers to optimize the allocation of the HSIO interfaces to better meet the I/O needs of their system.

The PCH Flexible I/O Lane support will vary depending on the PCH SKU. Refer to Introduction for specific SKU implementation details

FIA = Flex-IO Adapter

FIA LOS = Flex-IO Adapter Lane Ownership Number

Multi Purpose Lane Configuration details cover the Flexible HSIO Configuration Options

The 42 Flexible HSIO Lanes [41:0] support the following:

1. Up to twenty four PCI Express* (PCIe) Lanes
   • A maximum of fourteen PCIe Root Ports can be enabled when GbE Port is disabled
   • A maximum of thirteen PCIe Root Ports can be enabled when GbE Port is enabled
   • PCIe Lanes 1-4 (PCIe Controller #1 Gen4), 5-8 (PCIe Controller #2 Gen4), 9-12 (PCIe Controller #3 Gen4), 13-16 (PCIe Controller #4 Gen4), 17-20 (PCIe Controller #5 Gen4), and 21-24 (PCIe Controller #6 Gen4) must be individually configured
2. Up to ten USB 3.2 Gen 1x1/2x1 Lanes
   • A maximum of ten USB 3.2 Gen 1x1/2x1 Ports can be enabled
   • USB 3.2  Gen 1x1 = First Generation with One 5 GT/s Data Lane
   • USB 3.2  Gen 2x1 = Second Generation with One 10 GT/s Data Lane
3. Up to five USB 3.2 Gen 2x2 Lanes
   • A maximum of five USB 3.2 Gen 2x2 Ports can be enabled
   • USB 3.2  Gen 2x2 = Second Generation with Two 10 GT/s Data Lane
4. Up to eight SATA Lanes
   • A maximum of eight SATA Ports can be enabled
5. Up to three GbE Lanes
   • A maximum of one GbE Port can be enabled
6. Up to eight DMI Lanes for x4 and x8 support