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Atmel Electronic Components Datasheet

AT25DF641A Datasheet

64-Mbit 2.7V Minimum Serial Peripheral Interface Serial Flash Memory

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Features
Single 2.7V - 3.6V Supply
Serial Peripheral Interface (SPI) Compatible
– Supports SPI Modes 0 and 3
– Supports Atmel RapidS Operation
– Supports Dual-Input Program and Dual-Output Read
Very High Operating Frequencies
– 100MHz for RapidS
– 85MHz for SPI
– Clock-to-Output (tV) of 5ns Maximum
Flexible, Optimized Erase Architecture for Code + Data Storage Applications
– Uniform 4-Kbyte Block Erase
– Uniform 32-Kbyte Block Erase
– Uniform 64-Kbyte Block Erase
– Full Chip Erase
Individual Sector Protection with Global Protect/Unprotect Feature
– 128 Sectors of 64-Kbytes Each
Hardware Controlled Locking of Protected Sectors via WP Pin
Sector Lockdown
– Make Any Combination of 64-Kbyte Sectors Permanently Read-Only
128-Byte Programmable OTP Security Register
Flexible Programming
– Byte/Page Program (1- to 256-Bytes)
Fast Program and Erase Times
– 1.0ms Typical Page Program (256-Bytes) Time
– 50ms Typical 4-Kbyte Block Erase Time
– 250ms Typical 32-Kbyte Block Erase Time
– 400ms Typical 64-Kbyte Block Erase Time
Program and Erase Suspend/Resume
Automatic Checking and Reporting of Erase/Program Failures
Software Controlled Reset
JEDEC Standard Manufacturer and Device ID Read Methodology
Low Power Dissipation
– 5mA Active Read Current (Typical at 20MHz)
– 5µA Deep Power-Down Current (Typical)
Endurance: 100,000 Program/Erase Cycles
Data Retention: 20 Years
Complies with Full Industrial Temperature Range
Industry Standard Green (Pb/Halide-free/RoHS Compliant) Package Options
– 8-lead SOIC (208-mil wide)
– 8-contact Ultra Thin DFN (5mm x 6mm x 0.6mm)
64-Mbit
2.7V Minimum
Serial Peripheral
Interface Serial
Flash Memory
Atmel AT25DF641A
Preliminary
8693A–DFLASH–8/10


Atmel Electronic Components Datasheet

AT25DF641A Datasheet

64-Mbit 2.7V Minimum Serial Peripheral Interface Serial Flash Memory

No Preview Available !

1. Description
The Atmel® AT25DF641 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 AT25DF641A, with its erase granularity as small as 4-Kbytes, makes it ideal for data storage
as well, eliminating the need for additional data storage EEPROM devices.
The physical sectoring and the erase block sizes of the AT25DF641A have been optimized to
meet the needs of today's code and data storage applications. By optimizing the size of the
physical sectors and 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 protected sectors, 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 AT25DF641A also offers a sophisticated method for protecting individual sectors against
erroneous or malicious program and erase operations. By providing the ability to individually pro-
tect and unprotect sectors, a system can unprotect a specific sector to modify its contents while
keeping the remaining sectors of the memory array securely protected. This is useful in applica-
tions where program code is patched or updated on a subroutine or module basis, or in
applications where data storage segments need to be modified without running the risk of errant
modifications to the program code segments. In addition to individual sector protection capabili-
ties, the AT25DF641A incorporates Global Protect and Global Unprotect features that allow the
entire memory array to be either protected or unprotected all at once. This reduces overhead
during the manufacturing process since sectors do not have to be unprotected one-by-one prior
to initial programming.
To take code and data protection to the next level, the AT25DF641A incorporates a sector lock-
down mechanism that allows any combination of individual 64-Kbyte sectors to be locked down
and become permanently read-only. This addresses the need of certain secure applications that
require portions of the Flash memory array to be permanently protected against malicious
attempts at altering program code, data modules, security information, or encryption/decryption
algorithms, keys, and routines. The device also contains a specialized OTP (One-Time Pro-
grammable) 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 3V systems, the AT25DF641A supports read, program, and
erase operations with a supply voltage range of 2.7V to 3.6V. No separate voltage is required for
programming and erasing.
2 Atmel AT25DF641A [Preliminary]
8693A–DFLASH–8/10


Part Number AT25DF641A
Description 64-Mbit 2.7V Minimum Serial Peripheral Interface Serial Flash Memory
Maker ATMEL Corporation
Total Page 30 Pages
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