Intel® Core™ Ultra Processor

Datasheet, Volume 1 of 2
Supporting Intel® Core™ Ultra Processor for U/H/U-Type4-series Platforms, formerly known as Meteor Lake

ID Date Version Classification
792044 03/05/2024 Public

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Document Table of Contents

Features Supported

The SATA controller is capable of supporting all AHCI 1.3 and AHCI 1.3.1. Refer to the Intel web site on Advanced Host Controller Interface Specification for current specification status: http://www.intel.com/content/www/us/en/io/serial-ata/ahci.html.

For capability details, refer to SATA controller register .

The SATA supports the following features:

  • Port Multiplier:
    • The SATA controller may optionally support command-based switching Port Multipliers. Note:BIOS must clear this bit if Port Multipliers are not supported.
  • Host Initiated Loopback Mode:
    • The need to use PxCMD.CLO to clear the internal BSY bit before setting the PxCMD.ST to '1', as there is no power-up register FIS from device to clear the BSY bit.
    • Only one CI bit can be set per each Loopback session.
    • Only one PRD can be used in each CI.
    • Only PRD size of 256B is supported.
    • Only CL.CFL=0 is supported (don't care by HW)
    • Need to set the CL.P bit for the CI, to allow PRD prefetch, without waiting for device FIS.
    • Need to clear the PxCMD.ST bit after the loopback session done and set it again to start another session.

The SATA controller does not support:

  • FIS Based Switching
  • IDE mode or combination mode
  • Cold Presence Detect