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AT45DB321D bảng dữ liệu(PDF) 47 Page - ATMEL Corporation

tên linh kiện AT45DB321D
Giải thích chi tiết về linh kiện  32-megabit 2.7-volt DataFlash
PDF  57 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
nhà sản xuất  ATMEL [ATMEL Corporation]
Trang chủ  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT45DB321D bảng dữ liệu(HTML) 47 Page - ATMEL Corporation

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47
3597N–DFLASH–04/09
AT45DB321D
Figure 25-2. Algorithm for Randomly Modifying Data
Notes: 1. To preserve data integrity, each page of a DataFlash sector must be updated/rewritten at least once within every 10,000
cumulative page erase and program operations.
2. A Page Address Pointer must be maintained to indicate which page is to be rewritten. The Auto Page Rewrite command
must use the address specified by the Page Address Pointer.
3. Other algorithms can be used to rewrite portions of the Flash array. Low-power applications may choose to wait until 10,000
cumulative page erase and program operations have accumulated before rewriting all pages of the sector. See application
note AN-4 (“Using Atmel’s Serial DataFlash”) for more details.
START
MAIN MEMORY PAGE
TO BUFFER TRANSFER
(53H, 55H)
INCREMENT PAGE
ADDRESS POINTER
(2)
AUTO PAGE REWRITE
(2)
(58H, 59H)
END
provide address of
page to modify
If planning to modify multiple
bytes currently stored within
a page of the Flash array
MAIN MEMORY PAGE PROGRAM
THROUGH BUFFER
(82H, 85H)
BUFFER WRITE
(84H, 87H)
BUFFER TO MAIN
MEMORY PAGE PROGRAM
(83H, 86H)



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