1.1.8 SFDP Driver

The Serial Flash Discoverable Parameters (SFDP) driver provides a non-blocking interface to read, write, and erase JEDEC-compliant NOR Flash memory devices using SFDP for runtime discovery of Flash characteristics.

The driver uses the below peripheral library to interface with the SFDP Flash:

• QSPI Peripheral Library
  • Supports both SPI mode and Quad IO mode
• SPI Peripheral Library
  • Supports only SPI mode
• SQI Peripheral Library
  • Supports Quad Lane mode and Single Lane mode

• JEDEC Compliance: Supports multiple variants of JEDEC-compliant Flash devices
• Runtime Discovery: Discovers Flash parameters automatically using SFDP (JESD216)
• Single Instance: Supports a single instance of SFDP Flash and a single client to the driver
• Erase Operations: Supports Sector/Bulk/Chip Erase Operations
• Random Address Writes: Supports writes to random memory address within page boundaries
• Quad Mode Support: Automatically enables Quad IO mode if supported by the device
• Block Media Interface: The library interface is compliant to the block media interface expected by the Memory Driver, allowing running a file system on the Flash using the Memory Driver and File System Service
• Multi-Environment: Can be used in both Bare-Metal and RTOS environments

The SFDP driver works with any JEDEC-compliant NOR Flash device that supports SFDP discovery. Device parameters are discovered at runtime, eliminating the need for device-specific initialization code.

Common supported devices include:

• Microchip SST26 series (SFDP enabled)
• Industry-standard JEDEC devices with SFDP support
• Custom devices with SFDP descriptor tables