AT26F004-SSU ATMEL [ATMEL Corporation], AT26F004-SSU Datasheet - Page 3
AT26F004-SSU
Manufacturer Part Number
AT26F004-SSU
Description
4-megabit 2.7-volt Only Serial Firmware DataFlash Memory
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT26F004-SSU.pdf
(37 pages)
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3. Block Diagram
4. Memory Array
3588A–DFLSH–10/05
Figure 2-1.
HOLD
SCK
WP
SO
CS
SI
8-SOIC Top View
GND
WP
SO
CS
1
2
3
4
To provide the greatest flexibility, the memory array of the AT26F004 can be erased in four lev-
els of granularity including a full chip erase. In addition, the array has been divided into physical
sectors of various sizes, of which each sector can be individually protected from program and
erase operations. The sizes of the physical sectors are optimized for both code and data storage
applications, allowing both code and data segments to reside in their own isolated regions. The
Memory Architecture Diagram illustrates the breakdown of each erase level as well as the
breakdown of each physical sector.
INTERFACE
CONTROL
LOGIC
AND
8
7
6
5
VCC
HOLD
SCK
SI
CONTROL LOGIC
Y-DECODER
X-DECODER
Figure 2-2.
8-MLF Top View
GND
WP
SO
CS
1
2
3
4
AND LATCHES
I/O BUFFERS
Y-GATING
MEMORY
ARRAY
FLASH
8
7
6
5
VCC
HOLD
SCK
SI
AT26F004
3
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