Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO データシート

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SAM4E [DATASHEET]

Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14

The Enhanced Embedded Flash Controller (EEFC) ensures the interface of the Flash block with the 32-bit internal
bus. 

Its 128-bit or 64-bit wide memory interface increases performance. It also manages the programming, erasing,
locking and unlocking sequences of the Flash using a full set of commands. One of the commands returns the
embedded Flash descriptor definition that informs the system about the Flash organization, thus making the
software generic.

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Interface of the Flash Block with the 32-bit Internal Bus



Increases Performance in Thumb-2 Mode with 128-bit or 64-bit-wide Memory Interface up to 120 MHz 

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Code Loop Optimization

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128 Lock Bits, Each Protecting a Lock Region 



GPNVMx General-purpose GPNVM Bits



One-by-one Lock Bit Programming

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Commands Protected by a Keyword

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Erase the Entire Flash



Erase by Plane

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Erase by Sector

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Erase by Pages

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Possibility of Erasing before Programming

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Locking and Unlocking Operations 

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Possibility to Read the Calibration Bits

The Enhanced Embedded Flash Controller (EEFC) is continuously clocked. The Power Management Controller
has no effect on its behavior.

The EEFC interrupt line is connected to the interrupt controller. Using the EEFC interrupt requires the interrupt
controller to be programmed first. The EEFC interrupt is generated only on FRDY bit rising.

The embedded Flash interfaces directly with the 32-bit internal bus. The embedded Flash is composed of:



One memory plane organized in several pages of the same size

EFC

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