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Atmel Electronic Components Datasheet

AT25F1024A Datasheet

SPI Serial Memory

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Features
Serial Peripheral Interface (SPI) Compatible
Supports SPI Modes 0 (0,0) and 3 (1,1)
– Datasheet Describes Mode 0 Operation
20 MHz Clock Rate
Byte Mode and 256-byte Page Mode for Program Operations
Sector Architecture:
– Four Sectors with 32K Bytes Each (1M)
– 128 Pages per Sector
Product Identification Mode
Low-voltage Operation
– 2.7 (VCC = 2.7V to 3.6V)
Sector Write Protection
Write Protect (WP) Pin and Write Disable Instructions for
www.DataShbeoett4hUH.caormdware and Software Data Protection
Self-timed Program Cycle (20 µs/Byte Typical)
Self-timed Sector Erase Cycle (1 second/Sector Typical)
Single Cycle Reprogramming (Erase and Program) for Status Register
High Reliability
– Endurance: 10,000 Write Cycles Typical
Lead-free/Halogen-free Devices
8-lead JEDEC SOIC and 8-lead SAP Packages
Description
The AT25F1024A provides 1,048,576 bits of serial reprogrammable Flash memory
organized as 131,072 words of 8 bits each. The device is optimized for use in many
industrial and commercial applications where low-power and low-voltage operation
are essential. The AT25F1024A is available in a space-saving 8-lead JEDEC SOIC
and 8-lead SAP packages.
The AT25F1024A is enabled through the Chip Select pin (CS) and accessed via a 3-
wire interface consisting of Serial Data Input (SI), Serial Data Output (SO), and Serial
Clock (SCK). All write cycles are completely self-timed.
BLOCK WRITE protection for top 1/4, top 1/2 or the entire memory array is enabled by
programming the status register. Separate write enable and write disable instructions
are provided for additional data protection. Hardware data protection is provided via
the WP pin to protect against inadvertent write attempts to the status register. The
HOLD pin may be used to suspend any serial communication without resetting the
serial sequence.
Pin Configurations
8-lead SOIC
Pin Name
CS
SCK
Function
Chip Select
Serial Data Clock
CS
SO
WP
GND
1
2
3
4
8 VCC
7 HOLD
6 SCK
5 SI
SI Serial Data Input
SO
GND
VCC
WP
HOLD
Serial Data Output
Ground
Power Supply
Write Protect
Suspends Serial Input
8-lead SAP
VCC 8
HOLD 7
SCK 6
SI 5
1 CS
2 SO
3 WP
4 GND
Bottom View
SPI Serial
Memory
1M (131,072 x 8)
AT25F1024A
Advance
Information
Rev. 3346C–SEEPR–7/04
1


Atmel Electronic Components Datasheet

AT25F1024A Datasheet

SPI Serial Memory

No Preview Available !

Absolute Maximum Ratings*
Operating Temperature.................................... -40°C to +85°C
Storage Temperature ..................................... -65°C to +150°C
Voltage on Any Pin
with Respect to Ground .....................................-1.0V to +3.6V
Maximum Operating Voltage ............................................ 3.6V
DC Output Current........................................................ 5.0 mA
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Block Diagram
*NOTICE:
Stresses beyond those listed under “Absolute
Maximum Ratings” may cause permanent dam-
age to the device. This is a stress rating only and
functional operation of the device at these or any
other conditions beyond those indicated in the
operational sections of this specification is not
implied. Exposure to absolute maximum rating
conditions for extended periods may affect
device reliability.
131,072 x 8
2
3346C–SEEPR–7/04


Part Number AT25F1024A
Description SPI Serial Memory
Maker ATMEL Corporation
Total Page 18 Pages
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