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layout, increases system reliability, minimizes switching noise, and reduces package size and
active pin count. The device is optimized for use in many commercial and industrial applica-
tions where high density, low pin count, low voltage, and low power are essential. The device
operates at clock frequencies up to 20 MHz with a typical active read current consumption of
4 mA.
To allow for simple in-system reprogrammability, the AT45DB011B does not require high input
voltages for programming. The device operates from a single power supply, 2.7V to 3.6V, for
both the program and read operations. The AT45DB011B is enabled through the chip select
pin (CS) and accessed via a three-wire interface consisting of the Serial Input (SI), Serial Out-
put (SO), and the Serial Clock (SCK).
All programming cycles are self-timed, and no separate erase cycle is required before
programming.
When the device is shipped from Atmel, the most significant page of the memory array may
not be erased. In other words, the contents of the last page may not be filled with FFH.
Block Diagram
WP
FLASH MEMORY ARRAY
PAGE (264 BYTES)
BUFFER (264 BYTES)
SCK
CS
RESET
VCC
GND
I/O INTERFACE
RDY/BUSY
SI
SO
Memory Array
To provide optimal flexibility, the memory array of the AT45DB011B is divided into three levels
of granularity comprising of sectors, blocks, and pages. The Memory Architecture Diagram
illustrates 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.
2
AT45DB011B
1984J–DFLASH–06/06
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相关代理商/技术参数
AT45DB011B-XU 功能描述:闪存 1M SERIAL 2.7V - IND TEMP 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
AT45DB011D 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:1-megabit 2.7-volt Minimum DataFlash
AT45DB011D_07 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:1-megabit 2.7-volt DataFlash
AT45DB011D_08 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:1-megabit 2.7-volt Minimum DataFlash
AT45DB011D_09 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:1-megabit 2.7-volt Minimum DataFlash
AT45DB011D-DWF 制造商:Adesto Technologies Corporation 功能描述:1M DATAFLASH, 8-UDFN,IND,GRN,NIPDAU - 1MB, DATAFLASH, WAFER, - Gel-pak, waffle pack, wafer, diced wafer on film 制造商:Adesto Technologies Corporation 功能描述:DIE/WAFER FLASH 1MBIT 66MHZ
AT45DB011D-MH SL954 制造商:Adesto Technologies Corporation 功能描述:IC FLASH 1MBIT 66MHZ 8UDFN
AT45DB011D-MH-SL954 制造商:Adesto Technologies Corporation 功能描述:8-UDFN (5X6), IND TEMP, 2.7V, TRAY, 256 BYTE PAGE - Trays 制造商:Adesto Technologies Corporation 功能描述:Flash 1M, 66MHz, 2.7-3.6V DataFlash