- 您现在的位置：买卖IC网 > PDF目录381454 > AT45DB081D-SU-2.5 (ATMEL CORP) 8-megabit 2.5-volt or 2.7-volt DataFlash PDF资料下载
参数资料
| 型号： | AT45DB081D-SU-2.5 |
| 厂商： | ATMEL CORP |
| 元件分类： | DRAM |
| 英文描述： | 8-megabit 2.5-volt or 2.7-volt DataFlash |
| 中文描述： | 8M X 1 FLASH 2.7V PROM, PDSO8 |
| 封装： | 0.208 INCH, GREEN, PLASTIC, EIAJ, SOIC-8 |
| 文件页数： | 18/53页 |
| 文件大小： | 1105K |
| 代理商： | AT45DB081D-SU-2.5 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页当前第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页
18
3596E–DFLASH–02/07
AT45DB081D
10. Security Features
10.1
Sector Lockdown
The device incorporates a Sector Lockdown mechanism that allows each individual sector to be
permanently locked so that it becomes read only. This is useful for applications that require the
ability to permanently protect a number of sectors against malicious attempts at altering program
code or security information.
Once a sector is locked down, it can never be erased or pro-
grammed, and it can never be unlocked.
To issue the Sector Lockdown command, the CS pin must first be asserted as it would be for
any other command. Once the CS pin has been asserted, the appropriate 4-byte opcode
sequence must be clocked into the device in the correct order. The 4-byte opcode sequence
must start with 3DH and be followed by 2AH, 7FH, and 30H. After the last byte of the command
sequence has been clocked in, then three address bytes specifying any address within the sec-
tor to be locked down must be clocked into the device. After the last address bit has been
clocked in, the CS pin must then be deasserted to initiate the internally self-timed lockdown
sequence.
The lockdown sequence should take place in a maximum time of t
P
, during which time the Status
Register will indicate that the device is busy. If the device is powered-down before the comple-
tion of the lockdown sequence, then the lockdown status of the sector cannot be guaranteed. In
this case, it is recommended that the user read the Sector Lockdown Register to determine the
status of the appropriate sector lockdown bits or bytes and reissue the Sector Lockdown com-
mand if necessary.
Figure 10-1.
Sector Lockdown
Command
Byte 1
Byte 2
Byte 3
Byte 4
Sector Lockdown
3DH
2AH
7FH
30H
Opcode
Byte 1
Opcode
Byte 2
Opcode
Byte 3
Opcode
Byte 4
CS
Address
Bytes
Address
Bytes
Address
Bytes
Each transition
represents
8
b
its
SI
相关PDF资料 |
PDF描述 |
|---|---|
| AT45DB081 | 8-Megabit 2.7-volt Only Serial DataFlash |
| AT45DB081-RC | 8-Megabit 2.7-volt Only Serial DataFlash |
| AT45DB081-RI | 8-Megabit 2.7-volt Only Serial DataFlash |
| AT45DB081-TC | 8-Megabit 2.7-volt Only Serial DataFlash |
| AT45DB081-TI | 8-Megabit 2.7-volt Only Serial DataFlash |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AT45DB081D-SU-SL383 | 制造商:Atmel Corporation 功能描述:DATAFLASH, 8MB, SERIAL, 2.5V - |
| AT45DB081D-SU-SL383-AD | 功能描述:DATA FLASH 制造商:adesto technologies 系列:- 包装:剪切带（CT） 零件状态:Digi-Key 停止供應 存储器类型:非易失 存储器格式:闪存 技术:FLASH 存储容量:8Mb （264 字节 x 4096 页） 时钟频率:66MHz 写周期时间 - 字，页:4ms 存储器接口:SPI 电压 - 电源:2.7 V ~ 3.6 V 工作温度:-40°C ~ 85°C（TC） 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商器件封装:8-SOIC 标准包装:1 |
| AT45DB081D-SU-SL954 | 制造商:Atmel Corporation 功能描述:Flash Serial-SPI 3V/3.3V 8Mbit 6ns 8-Pin SOIC EIAJ T/R 制造商:Adesto Technologies Corporation 功能描述:IC FLASH 8MBIT 66MHZ 8SOIC 制造商:Atmel 功能描述:Flash Serial-SPI 3V/3.3V 8Mbit 6ns 8-Pin SOIC EIAJ T/R |
| AT45DB081DSU-SL954 | 制造商:Atmel 功能描述:Flash Serial-SPI 3V/3.3V 8Mbit 6ns 8-Pin SOIC EIAJ T/R |
| AT45DB081D-SU-SL955 | 制造商:Adesto Technologies Corporation 功能描述:8-SOIC-W, IND TEMP, 2.7V, T&R, 256 BYTE PAGE - Tape and Reel 制造商:Adesto Technologies Corporation 功能描述:IC FLASH 8MBIT 66MHZ 8SOIC 制造商:Adesto Technologies Corporation 功能描述:Flash 8M, 66MHz 2.7-3.6V DataFlash |
发布紧急采购，3分钟左右您将得到回复。