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參數(shù)資料
| 型號： | AT45D021-JI |
| 廠商： | ATMEL CORP |
| 元件分類： | DRAM |
| 英文描述： | 2-Megabit 5-volt Only Serial DataFlash |
| 中文描述： | 2M X 1 FLASH 5V PROM, PQCC32 |
| 封裝： | PLASTIC, MS-016AE, LCC-32 |
| 文件頁數(shù)： | 16/18頁 |
| 文件大?。?/td> | 200K |
| 代理商： | AT45D021-JI |
AT45D021
16
Figure 2.
Algorithm for Randomly Modifying Data
Notes:
1.
To preserve data integrity, each page of the DataFlash memory array must be updated/rewritten at least once within every
10,000 cumulative page erase/program operations.
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.
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/program operations have accumulated before rewriting all pages of the Flash array. See application
note AN-4 (“Using Atmel’s Serial DataFlash”) for more details.
2.
3.
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
(82H, 85H)
BUFFER WRITE
(84H, 87H)
BUFFER to MAIN
MEMORY PAGE PROGRAM
(83H, 86H)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AT45D021-RC | 2-Megabit 5-volt Only Serial DataFlash |
| AT45D021-RI | 2-Megabit 5-volt Only Serial DataFlash |
| AT45D021-TC | 2-Megabit 5-volt Only Serial DataFlash |
| AT45D021-TI | 2-Megabit 5-volt Only Serial DataFlash |
| AT45D041 | 4-Megabit 5-volt Only Serial DataFlash |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT45D021-RC | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:2-Megabit 5-volt Only Serial DataFlash |
| AT45D021-RI | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:2-Megabit 5-volt Only Serial DataFlash |
| AT45D021-TC | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:2-Megabit 5-volt Only Serial DataFlash |
| AT45D021-TI | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:2-Megabit 5-volt Only Serial DataFlash |
| AT45D02-RC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:(183.07 k) |
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