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AT45DB041B-RU Datasheet(PDF) 3 Page - ATMEL Corporation

Part # AT45DB041B-RU
Description  4-megabit 2.5-volt or 2.7-volt DataFlash
PDF  35 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT45DB041B-RU Datasheet(HTML) 3 Page - ATMEL Corporation

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3
3443C–DFLSH–5/05
AT45DB041B
3.
Block Diagram
4.
Memory Array
To provide optimal flexibility, the memory array of the AT45DB041B is divided into three levels of
granularity comprising of sectors, blocks, and pages. The Memory Architecture Diagram illus-
trates the breakdown of each level and details the number of pages per sector and block. All
program operations to the DataFlash occur on a page-by-page basis; however, the optional
erase operations can be performed at the block or page level.
Figure 4-1.
Memory Architecture Diagram
FLASH MEMORY ARRAY
PAGE (264 BYTES)
BUFFER 2 (264 BYTES)
BUFFER 1 (264 BYTES)
I/O INTERFACE
SCK
CS
RESET
VCC
GND
RDY/BUSY
WP
SO
SI
SECTOR 0 = 8 Pages
2112 bytes (2K + 64)
SECTOR 1 = 248 Pages
65,472 bytes (62K + 1984)
Block = 2112 bytes
(2K + 64)
8 Pages
SECTOR 0
Page = 264 bytes
(256 + 8)
PAGE 0
PAGE 1
PAGE 6
PAGE 7
PAGE 8
PAGE 9
PAGE 2046
PAGE 2047
PAGE 14
PAGE 15
PAGE 16
PAGE 17
PAGE 18
PAGE 2045
SECTOR ARCHITECTURE
BLOCK ARCHITECTURE
PAGE ARCHITECTURE
BLOCK 0
BLOCK 1
BLOCK 30
BLOCK 31
BLOCK 32
BLOCK 33
BLOCK 254
BLOCK 255
BLOCK 62
BLOCK 63
BLOCK 64
BLOCK 65
SECTOR 5 = 512 Pages
135,168 bytes (128K + 4K)
BLOCK 2
SECTOR 2 = 256 Pages
67,584 bytes (64K + 2K)
SECTOR 3 = 512 Pages
135,168 bytes (128K + 4K)
SECTOR 4 = 512 Pages
135,168 bytes (128K + 4K)



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