AT25DF021A datasheet(6/59 Pages) RENESAS

6 / 59 page

DS-AT25DF021A-042 Rev. L

Page 6

8/7/23

AT25DF021A Datasheet

Description

The AT25DF021A is a serial interface Flash memory device designed for use in a wide variety of high-volume

consumer based applications in which program code is shadowed from Flash memory into embedded or external

RAM for execution. The flexible erase architecture of the AT25DF021A, with its page erase granularity it is ideal

for data storage as well, eliminating the requirement for additional data storage devices.

The erase block sizes of the AT25DF021A have been optimized to meet the requirements of today's code and

data storage applications. By optimizing the size of the erase blocks, the memory space can be used much more

efficiently. Because certain code modules and data storage segments must reside by themselves in their own

erase regions, the wasted and unused memory space that occurs with large sectored and large block erase Flash

memory devices can be greatly reduced. This increased memory space efficiency allows additional code routines

and data storage segments to be added while still maintaining the same overall device density.

The device also contains a specialized OTP (One-Time Programmable) Security Register that can be used for

purposes such as unique device serialization, system-level Electronic Serial Number (ESN) storage, locked key

storage, etc.

Specifically designed for use in many different systems, the AT25DF021A supports read, program, and erase

operations with a wide supply voltage range of 1.65 V to 3.6 V. No separate voltage is required for programming

and erasing.

AT25DF021A Datenblatt(PDF) 6 Page - Renesas Technology Corp