AT25DF321A-MH-T datasheet(4/52 Pages) ATMEL

Teilenummer	AT25DF321A-MH-T

Bauteilbeschribung	32-Mbit 2.7V Minimum Serial Peripheral Interface Serial Flash Memory

PDF	52 Pages

Scroll/Zoom	100%

Hersteller	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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4 / 52 page

3686D–DFLASH–12/09

Atmel AT25DF321A

Block Diagram

Figure 3-1.

Block Diagram

Memory Array

To provide the greatest flexibility, the memory array of the Atmel

® AT25DF321A 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 program 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.

Figure 2-1.

8-SOIC (Top View)

Figure 2-2.

8-UDFN (Top View)

SO (SOI)

GND

VCC

HOLD

SCK

SI (SIO)

SO (SOI)

GND

VCC

HOLD

SCK

SI (SIO)

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

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