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AT25DF021 датащи(PDF) 4 Page - ATMEL Corporation

номер детали AT25DF021
подробное описание детали  2-Megabit 2.3-volt or 2.7-volt Minimum SPI Serial Flash Memory
PDF  41 Pages
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производитель  ATMEL [ATMEL Corporation]
домашняя страница  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT25DF021 датащи(HTML) 4 Page - ATMEL Corporation

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4
3677D–DFLASH–04/09
AT25DF021
3. Block Diagram
Figure 3-1.
Block Diagram
4. Memory Array
To provide the greatest flexibility, the memory array of the AT25DF021 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 uniform size, of which each sector can be individually protected from program and
erase operations. The size of the physical sectors is 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.
Figure 2-1.
8-SOIC Top View
Figure 2-2.
8-UDFN (Top View)
1
2
3
4
8
7
6
5
CS
SO
WP
GND
VCC
HOLD
SCK
SI
CS
SO
WP
GND
1
2
3
4
8
7
6
5
VCC
HOLD
SCK
SI
FLASH
MEMORY
ARRAY
Y-GATING
CS
SCK
SO
SI
Y-DECODER
X-DECODER
I/O BUFFERS
AND LATCHES
CONTROL AND
PROTECTION LOGIC
SRAM
DATA BUFFER
WP
INTERFACE
CONTROL
AND
LOGIC
HOLD



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