beautypg.com

Rainbow Electronics AT45DB011B User Manual

Megabit 2.7-volt only dataflash, Features, Description

background image

1

1-megabit
2.7-volt Only
DataFlash

®

AT45DB011B

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)
– 512 Pages (264 Bytes/Page) Main Memory

Supports Page and Block Erase Operations

One 264-byte SRAM Data Buffer

Continuous Read Capability through Entire Array

– Ideal for Code Shadowing Applications

Fast Page Program Time – 7 ms Typical

120 µs Typical Page to Buffer Transfer Time

Low Power Dissipation

– 4 mA Active Read Current Typical
– 2 µA CMOS Standby Current Typical

Hardware Data Protection Feature

100% Compatible with AT45DB011

Commercial and Industrial Temperature Ranges

Description

The AT45DB011B 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 1,081,344 bits of memory are organized as 512 pages of 264 bytes each. In addi-
tion to the main memory, the AT45DB011B also contains one SRAM data buffer of 264
bytes. The buffer allows receiving of data while a page in the main memory is being
reprogrammed. EEPROM emulation (bit or byte alterability) is easily handled with a
self-contained three step Read-Modify-Write operation. Unlike conventional Flash
memories that are accessed randomly with multiple address lines and a parallel inter-
face, the DataFlash uses a SPI serial interface to sequentially access its data. SPI
mode 0 and mode 3 are supported. The simple serial interface facilitates hardware

AT45DB011B
Preliminary 16-
Megabit 2.7-volt
Only Serial
DataFlash

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

CBGA Top View

through Package

A

B

C

1

2

3

VCC

WP

RESET

GND

RDY/BSY

SI

SCK

CS

SO

TSSOP Top View

Type 1

1

2

3

4

5

6

7

14

13

12

11

10

9

8

RDY/BUSY

RESET

WP

VCC

GND

SCK

SO

CS

NC

NC

NC

NC

NC

SI

SOIC

1

2

3

4

8

7

6

5

SI

SCK

RESET

CS

SO

GND

VCC

WP

Rev. 1984E–DFLSH–10/02

Table of contents