Intel® Agilex™ Hard Processor System Technical Reference Manual

ID 683567
Date 11/11/2022
Public

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16.5.12.4. Alternative Boot Operation

The alternative boot operation differs from the previous boot operation in that software uses the SD/SDIO GO_IDLE_STATE command to boot the card, rather than holding down the CMD line of the card. The alternative boot operation can be performed only if bit 0 in the BOOT_INFO register is set to 1. BOOT_INFO is located at offset 228 in the EXT_CSD registers.

For detailed information about alternative boot operation, refer to the following specifications available on the JEDEC website:

  • JEDEC Standard No. 84‑A441
  • JEDEC Standard No. 84‑A44
  • JEDEC Standard No. JESD84‑A43