AT45DB321B datasheet(1/32 Pages) ATMEL

Part #	AT45DB321B

Description	32-megabit 2.7-volt Only DataFlash

PDF	32 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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1 / 32 page

1

Features

• Single 2.7V - 3.6V Supply

• Serial Peripheral Interface (SPI) Compatible

• 20 MHz Max Clock Frequency

• Page Program Operation

– Single Cycle Reprogram (Erase and Program)

– 8192 Pages (528 Bytes/Page) Main Memory

• Supports Page and Block Erase Operations

• Two 528-byte SRAM Data Buffers – Allows Receiving of Data

while Reprogramming of Nonvolatile Memory

• Continuous Read Capability through Entire Array

– Ideal for Code Shadowing Applications

• Low Power Dissipation

– 4 mA Active Read Current Typical

– 2 µA CMOS Standby Current Typical

• Hardware Data Protection Feature

• 100% Compatible to AT45DB321

• 5.0V-tolerant Inputs: SI, SCK, CS, RESET and WP Pins

• Commercial and Industrial Temperature Ranges

Description

The AT45DB321B is a 2.7-volt only, serial interface Flash memory ideally suited for

a wide variety of digital voice-, image-, program code- and data-storage applications.

Its 34,603,008 bits of memory are organized as 8192 pages of 528 bytes each. In

addition to the main me mor y, the AT45 DB321B also cont ains two SRAM

data buffers of 528 bytes each. The buffers allow receiving of data while a page in the

main memory is being reprogrammed, as well as reading or writing a continuous data

32-megabit

2.7-volt Only

DataFlash®

AT45DB321B

TSOP Top View

Type 1

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

RDY/BUSY

RESET

WP

NC

VCC

GND

NC

CS

SCK

SI

SO

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

NC

CBGA Top View through Package

A

B

C

D

E

F

G

H

J

1

2345

NC

VCC

WP

RESET

NC

GND

RDY/BSY

SI

NC

SCK

CS

SO

NC

Pin Configurations

Pin Name

Function

CS

Chip Select

SCK

Serial Clock

SI

Serial Input

SO

Serial Output

WP

Hardware Page Write Protect Pin

RESET

Chip Reset

RDY/BUSY

Ready/Busy

DataFlash Card(1)

Note:

1.

See AT45DCB004 Datasheet

76 54321

SOIC

1

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5

6

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9

10

11

12

13

14

28

27

26

25

24

23

22

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19

18

17

16

15

GND

NC

CS

SCK

SI

SO

NC

VCC

NC

WP

RESET

RDY/BUSY

NC

Rev. 2223D–DFLASH–10/02

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