Intel® Agilex™ Configuration User Guide

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ID 683673
Date 5/30/2022
Public

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5.5.4. Command Sequence To Perform Quad SPI Operations

Here is the recommended command sequence to access quad SPI flash memory or perform an RSU update operation.

Refer to Command List and Descriptions for more information about these commands.

  1. Request exclusive access to the AS x4 interface: QSPI_OPEN .
  2. Specify a quad SPI flash chip: QSPI_SET_CS*. This command is optional for the AS x4 configuration scheme and mandatory for JTAG configuration schemes.
  3. Perform the desired operations. The following operations are available:
    • QSPI_READ
    • QSPI_WRITE
    • QSPI_ERASE
    • QSPI_READ_DEVICE_REG
    • QSPI_WRITE_DEVICE_REG
    • QSPI_SEND_DEVICE_OP
    • RSU_IMAGE_UPDATE
  4. Close exclusive access to the AS x4 interface: QSPI_CLOSE.

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