AT25DF641A datasheet(5/57 Pages) ATMEL

Part #	AT25DF641A

Description	64-Mbit 2.7V Minimum Serial Peripheral Interface Serial Flash Memory

PDF	57 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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5 / 57 page

8693A–DFLASH–8/10

Atmel AT25DF641A [Preliminary]

Block Diagram

Figure 3-1.

Block Diagram

Memory Array

To provide the greatest flexibility, the memory array of the Atmel® AT25DF641A can be erased

in four levels of granularity including a full chip erase. In addition, the array has been divided into

physical sectors of uniform size, of which each sector can be individually protected from pro-

gram and erase operations. The size of the physical sectors is optimized for both code and data

storage applications, allowing both code and data segments to reside in their own isolated

regions. The Memory Architecture Diagram illustrates the breakdown of each erase level as well

as the breakdown of each physical sector.

FLASH

MEMORY

ARRAY

Y-GATING

SCK

SO (SOI)

SI (SIO)

Y-DECODER

X-DECODER

I/O BUFFERS

AND LATCHES

CONTROL AND

PROTECTION LOGIC

SRAM

DATA BUFFER

INTERFACE

CONTROL

AND

LOGIC

HOLD

AT25DF641A Datasheet(PDF) 5 Page - ATMEL Corporation