AT45 datasheet(2/20 Pages) ATMEL

2 / 20 page

AT45DB011

ware layout, increases system reliability, minimizes switch-

ing noise, and reduces package size and active pin count.

The device is optimized for use in many commercial and

industrial applications where high density, low pin count,

low voltage, and low power are essential. Typical applica-

tions for the DataFlash are digital voice storage, image

storage, and data storage. The device operates at clock

frequencies up to 15 MHz with a typical active read current

consumption of 15 mA.

To allow for simple in-system reprogrammability, the

AT45D011 does not require high input voltages for pro-

gramming. The device operates from a single power sup-

ply, 4 . 5 V t o 5 . 5 V , for bot h th e p r ogr a m a nd r ead

operations. The AT45D011 is enabled through the chip

select pin (CS) and accessed via a three-wire interface

consisting of the Serial Input (SI), Serial Output (SO), and

the Serial Clock (SCK).

All programming cycles are self-timed, and no separate

erase cycle is required before programming.

Block Diagram

Memory Array

To provide optimal flexibility, the memory array of the

AT45D011 is divided into three levels of granularity com-

prising of sectors, blocks, and pages. The Memory Archi-

tecture Diagram illustrates the breakdown of each level and

details the number of pages per sector and block. All pro-

gram operations to the DataFlash occur on a page by page

basis; however, the optional erase operations can be per-

formed at the block or page level.

FLASH MEMORY ARRAY

PAGE (264 BYTES)

BUFFER (264 BYTES)

I/O INTERFACE

SCK

RESET

VCC

GND

RDY/BUSY

AT45 датащи(PDF) 2 Page - ATMEL Corporation