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Atmel Electronic Components Datasheet

AT25F2048 Datasheet

SPI Serial Memory 2M (262/144 x 8)

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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:
– Four Sectors with 64K Bytes Each
– 256 Pages per Sector
Product Identification Mode
Low-voltage Operation
– 2.7 (VCC = 2.7V to 3.6V)
Sector Write Protection
– Protect 1/4, 1/2 or Entire Array
Write Protect (WP) Pin and Write Disable Instructions for
both Hardware and Software Data Protection
Self-timed Program Cycle (30 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
8-lead JEDEC SOIC
Description
The AT25F2048 provides 2,097,152 bits of serial reprogrammable Flash memory
organized as 262,144 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 AT25F2048 is available in a space-saving 8-lead JEDEC SOIC
package.
SPI Serial
Memory
2M (262,144 x 8)
AT25F2048
Preliminary
Pin Configurations
Pin Name
CS
Function
Chip Select
SCK
SI
SO
Serial Data Clock
Serial Data Input
Serial Data Output
GND
VCC
WP
HOLD
Ground
Power Supply
Write Protect
Suspends Serial Input
8-lead SOIC
CS
SO
WP
GND
1
2
3
4
8 VCC
7 HOLD
6 SCK
5 SI
Rev. 2455D–SEEPR–7/04
1


Atmel Electronic Components Datasheet

AT25F2048 Datasheet

SPI Serial Memory 2M (262/144 x 8)

No Preview Available !

The AT25F2048 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.
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
262,144 x 8
2 AT25F2048
2455D–SEEPR–7/04


Part Number AT25F2048
Description SPI Serial Memory 2M (262/144 x 8)
Maker ATMEL Corporation
Total Page 17 Pages
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