参数资料
型号: AT45DB321C-CI
厂商: Atmel
文件页数: 32/40页
文件大小: 0K
描述: IC FLASH 32MBIT 40MHZ 24CBGA
标准包装: 378
格式 - 存储器: 闪存
存储器类型: DataFLASH
存储容量: 32M(8192 页 x 528 字节)
速度: 40MHz
接口: SPI 3 线串行
电源电压: 2.7 V ~ 3.6 V
工作温度: -40°C ~ 85°C
封装/外壳: 24-TBGA,CSPBGA
供应商设备封装: 24-CBGA
包装: 托盘
Figure 15-2. Algorithm for Randomly Modifying Data
START
provide address of
page to modify
MAI N MEMORY PAGE
TO BUFFER TRA N SFER
(53H, 55H)
If planning to modify multiple
bytes currently stored within
a page of the Flash array
BUFFER W RITE
( 8 4H, 8 7H)
MAI N MEMORY PAGE PROGRAM
THROUGH BUFFER
( 8 2H, 8 5H)
BUFFER TO MAI N
MEMORY PAGE PROGRAM
( 8 3H, 8 6H)
AUTO PAGE RE W RITE
(2)
(5 8 H, 59H)
I N CREME N T PAGE
(2)
ADDRESS POI N TER
E N D
Notes:
32
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.
AT45DB321C
3387M–DFLASH–2/08
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