eCosPro® Reference Manual
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# Overview

## Name

Overview -- eCos Support for Atmel AT45xxxxxx DataFlash Devices and Compatibles

## Description

The CYGPKG_DEVS_FLASH_ATMEL_DATAFLASH Atmel AT45xxxxxx V2 flash driver package implements support for the AT45xxxxxx family of flash devices and compatibles. The driver is not normally accessed directly. Instead application code will use the API provided by the generic flash driver package CYGPKG_IO_FLASH, for example by calling functions like `cyg_flash_program`.

DataFlash devices are accessed via the SPI bus. Therefore, any platform on which this driver is to be used must also have an SPI driver. The DataFlash driver accesses the driver via the standard SPI API calls defined in the CYGPKG_IO_SPI package.

## Configuration

The DataFlash flash driver package will be loaded automatically when configuring eCos for a target with suitable hardware. However the driver will be inactive unless the generic flash package CYGPKG_IO_FLASH is loaded. It may be necessary to add this generic package to the configuration explicitly before the driver functionality becomes available. There should never be any need to load or unload the DataFlash driver package.

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Atmel AT45xxxxxx DataFlash Device Driver | Up | Instantiating a DataFlash Device