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Atmel Electronic Components Datasheet

AT25F1024 Datasheet

SPI Serial Memory

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Features
Serial Peripheral Interface (SPI) Compatible
Supports SPI Modes 0 (0,0) and 3 (1,1)
20 MHz Clock Rate
Byte Mode and 256-byte Page Mode for Program Operations
Sector Architecture:
– Two Sectors with 32K Bytes Each (512K)
– 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
both Hardware and Software Data Protection
Self-timed Program Cycle (60 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 Devices Available
8-lead JEDEC SOIC and 8-lead SAP Packages
Description
The AT25F512/1024 provides 524,288/1,048,576 bits of serial reprogrammable Flash
memory organized as 65,536/131,072 words of 8 bits each. The device is optimized
for use in many industrial and commercial applications where low-power and low-volt-
age operation are essential. The AT25F512/1024 is available in a space-saving 8-lead
JEDEC SOIC and 8-lead SAP packages.
The AT25F512/1024 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 (1M) or
entire memory array (512K) 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
SI
Function
Chip Select
Serial Data Clock
Serial Data Input
CS
SO
WP
GND
1
2
3
4
8 VCC
7 HOLD
6 SCK
5 SI
SO Serial Data Output
8-lead SAP
GND
VCC
WP
HOLD
Ground
Power Supply
Write Protect
Suspends Serial Input
VCC 8
HOLD 7
SCK 6
SI 5
1 CS
2 SO
3 WP
4 GND
Bottom View
SPI Serial
Memory
512K (65,536 x 8)
1M (131,072 x 8)
AT25F512
AT25F1024
Rev. 1440P–SEEPR–6/04
1


Atmel Electronic Components Datasheet

AT25F1024 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
*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.
Block Diagram
65,536 x 8
or
131,072 x 8
2 AT25F512/1024
1440P–SEEPR–6/04


Part Number AT25F1024
Description SPI Serial Memory
Maker ATMEL Corporation
Total Page 18 Pages
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