AT26F004 datasheet(3/38 Pages) ATMEL

Part #	AT26F004

Description	4-megabit 2.7-volt Only Serial Firmware DataFlash Memory

PDF	38 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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3 / 38 page

3588C–DFLASH–04/06

AT26F004

Block Diagram

Memory Array

To provide the greatest flexibility, the memory array of the AT26F004 can be erased in four lev-

els of granularity including a full chip erase. In addition, the array has been divided into physical

sectors of various sizes, of which each sector can be individually protected from program and

erase operations. The sizes of the physical sectors are 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.

Figure 2-1.

8-SOIC Top View

Figure 2-2.

8-MLF Top View

GND

VCC

HOLD

SCK

GND

VCC

HOLD

SCK

FLASH

MEMORY

ARRAY

Y-GATING

CONTROL LOGIC

SCK

HOLD

Y-DECODER

X-DECODER

I/O BUFFERS

AND LATCHES

INTERFACE

CONTROL

AND

LOGIC

AT26F004 Datasheet(PDF) 3 Page - ATMEL Corporation