Rainbow Electronics AT25F1024A User Manual
Features, Description, Pin configurations
1
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 (V
CC
= 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 (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.
Rev. 3346C–SEEPR–7/04
SPI Serial
Memory
1M (131,072 x 8)
AT25F1024A
Advance
Information
Pin Configurations
Pin Name
Function
CS
Chip Select
SCK
Serial Data Clock
SI
Serial Data Input
SO
Serial Data Output
GND
Ground
VCC
Power Supply
WP
Write Protect
HOLD
Suspends Serial Input
8-lead SOIC
1
2
3
4
8
7
6
5
CS
SO
WP
GND
VCC
HOLD
SCK
SI
8-lead SAP
Bottom View
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
CS
SO
WP
GND