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| 型号： | AT26DF321-SU |
| 厂商： | Atmel |
| 文件页数： | 14/34页 |
| 文件大小： | 0K |
| 描述： | IC FLASH 32MBIT 66MHZ 8SOIC |
| 标准包装： | 95 |
| 格式 - 存储器： | 闪存 |
| 存储器类型： | DataFLASH |
| 存储容量： | 32M（16384 页 x 256 字节） |
| 速度： | 66MHz |
| 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： | 8-SOIC（0.209"，5.30mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
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issue the Unprotect Sector command will be ignored, and the device will reset the WEL bit in the
Status Register back to a logical “0” and return to the idle state once the CS pin has been
deasserted.
Figure 9-4.
CS
Unprotect Sector
0
1
2
3
4
5
6
7
8
9
10 11 12
26 27 28 29 30 31
SCK
OPCODE
ADDRESS BITS A23-A0
SI
0
0
1
1
1
0
0
1
A
A
A
A
A
A
A
A
A
A
A
A
MSB
MSB
SO
HIGH-IMPEDANCE
9.5
14
Global Protect/Unprotect
The Global Protect and Global Unprotect features can work in conjunction with the Protect Sec-
tor and Unprotect Sector functions. For example, a system can globally protect the entire
memory array and then use the Unprotect Sector command to individually unprotect certain sec-
tors and individually reprotect them later by using the Protect Sector command. Likewise, a
system can globally unprotect the entire memory array and then individually protect certain sec-
tors as needed.
Performing a Global Protect or Global Unprotect is accomplished by writing a certain combina-
tion of data to the Status Register using the Write Status Register command (see “Write Status
Register” section on page 21 for command execution details). The Write Status Register com-
mand is also used to modify the SPRL (Sector Protection Registers Locked) bit to control
hardware and software locking.
To perform a Global Protect, the appropriate WP pin and SPRL conditions must be met and the
system must write a logical “1” to bits 5, 4, 3, and 2 of the Status Register. Conversely, to per-
form a Global Unprotect, the same WP and SPRL conditions must be met but the system must
write a logical “0” to bits 5, 4, 3, and 2 of the Status Register. Table 9-2 details the conditions
necessary for a Global Protect or Global Unprotect to be performed.
AT26DF321
3633F–DFLASH–5/7/08
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| AT26DF321-SU SL514 | 制造商:Atmel Corporation 功能描述: |
| AT26F004 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:4-megabit 2.7-volt Only Serial Firmware DataFlash Memory |
| AT26F004_06 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:4-megabit 2.7-volt Only Serial Firmware DataFlash Memory |
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| AT26F004-MU | 功能描述:闪存 4M SERIAL FLASH 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 |
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