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# 1.1.12.1.3 Configuring The Library

The AT25DF driver library should be configured through the MHC. The following figures show the MHC configuration window for the AT25DF driver and brief description.

AT25DF Driver with SPI peripheral connected

AT25DF Driver with connection to Memory Driver

Configuration Options

- PLIB Used:

  - Specifies the Peripheral library connected

- Number Of Clients:

  - Indicates maximum number of clients

  - Always set to one as it supports only a single client

- Page Size:

  - Size of one page of FLASH memory (in bytes)

- Flash Size:

  - Total Size of the FLASH memory (in bytes)

- Chip Select Pin:

  - FLASH chip select pin (active low)

  - This pin must be configured as GPIO output in "Pin Settings" configuration

- AT25DF Flash Start Address:

  - Specifies the flash memory start address to be used for Transfer operations

  - The start address will be populated in the device geometry table DRV_AT25DF_GEOMETRY

- AT25DF Erase Buffer Size:

  - This option appears only when the AT25DF driver is connected to the Memory driver for block operations

  - Specifies the size for erase buffer used by Memory driver

  - The size of the buffer should be equal to erase sector size as the memory driver will call DRV_AT25DF_SectorErase