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AT45DB321C
3. Block Diagram
W P
PAGE (52 8 BYTES)
FLASH MEMORY ARRAY
SCK
CS
RESET
V CC
G N D
BUFFER 1 (52 8 BYTES)
I/O I N TERFACE
BUFFER 2 (52 8 BYTES)
RDY/BUSY
SI
SO
4. Memory Array
To provide optimal flexibility, the memory array of the AT45DB321C 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. The erase operations can
be performed at the block or page level.
Figure 4-1.
Memory Architecture Diagram
SECTOR ARCHITECTURE
BLOCK ARCHITECTURE
PAGE ARCHITECTURE
SECTOR 0a = 8 Pages
4224 bytes (4K + 128)
SECTOR 0a
BLOCK 0
BLOCK 1
8 Pages
PAGE 0
PAGE 1
BLOCK 2
SECTOR 0b = 504 Pages
266,112 bytes (252K + 8064)
PAGE 6
BLOCK 62
PAGE 7
SECTOR 1 = 512 Pages
270,336 bytes (256K + 8K)
BLOCK 63
BLOCK 64
PAGE 8
PAGE 9
BLOCK 65
SECTOR 2 = 512 Pages
270,336 bytes (256K + 8K)
BLOCK 126
BLOCK 127
BLOCK 128
PAGE 14
PAGE 15
PAGE 16
PAGE 17
PAGE 18
SECTOR 14 = 512 Pages
270,336 bytes (256K + 8K)
SECTOR 15 = 512 Pages
BLOCK 129
PAGE 8189
270,336 bytes (256K + 8K)
BLOCK 1022
BLOCK 1023
Block = 4224 bytes
(4K + 128)
PAGE 8190
PAGE 8191
Page = 528 bytes
(512 + 16)
3
3387M–DFLASH–2/08
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相关代理商/技术参数
AT45DB321C-TI 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:32-megabit 2.7 volt DataFlash
AT45DB321C-TU 功能描述:IC FLASH 32MBIT 40MHZ 28TSOP RoHS:是 类别:集成电路 (IC) >> 存储器 系列:- 标准包装:1 系列:- 格式 - 存储器:RAM 存储器类型:SDRAM 存储容量:256M（8Mx32） 速度:143MHz 接口:并联 电源电压:3 V ~ 3.6 V 工作温度:-40°C ~ 85°C 封装/外壳:90-VFBGA 供应商设备封装:90-VFBGA（8x13） 包装:托盘 其它名称:Q2841869
AT45DB321D 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:2.7V 32Mbit dataflash
AT45DB321D_07 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:32-megabit 2.7-volt DataFlash
AT45DB321D_08 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:32-megabit 2.7-volt DataFlash
AT45DB321D_09 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:32-megabit 2.7-volt DataFlash
AT45DB321D_12 制造商:AD 制造商全称:Analog Devices 功能描述:32Mb, 2.5V or 2.7V DataFlash
AT45DB321D-CCU 功能描述:闪存 32M 2.7-3.6V, 66Mhz Serial 闪存 RoHS:否 制造商:ON Semiconductor 数据总线宽度:1 bit 存储类型:Flash 存储容量:2 MB 结构:256 K x 8 定时类型: 接口类型:SPI 访问时间: 电源电压-最大:3.6 V 电源电压-最小:2.3 V 最大工作电流:15 mA 工作温度:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体: 封装:Reel