600 Series Chipset Family On-Package Platform Controller Hub
Datasheet, Volume 1 of 2
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Flexible I/O Lane Selection
HSIO lane configuration and type is statically selected by soft straps, which are managed through the Platform Flash Image Tool, available as part of Intel® CSME releases. Refer to the SPI Programming Guide documentation for details on how to configure the Flexible I/O lanes via soft straps.
PCIe*/SATA Lane Selection
In addition to static configuration via soft straps, Flexible I/O Lanes that have PCIe*/SATA multiplexing can be configured via SATAXPCIE signaling to support implementation like SATA Express or mSATA, where the port configuration is selected by the type of the add-in card that is used. Refer to the Platform SPI Programming Guide for more details on how to configure SATAXPCIE for SATA/PCIe* lane selection.