参数资料
型号: AT45DB081D-SSU-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: 0.150 INCH, GREEN, PLASTIC, MS-012AA, SOIC-8
文件页数: 14/53页
文件大小: 1105K
代理商: AT45DB081D-SSU-2.5
14
3596E–DFLASH–02/07
AT45DB081D
9.1
Sector Protection Register
The nonvolatile Sector Protection Register specifies which sectors are to be protected or unpro-
tected with either the software or hardware controlled protection methods. The Sector Protection
Register contains 16 bytes of data, of which byte locations 0 through 15 contain values that
specify whether sectors 0 through 15 will be protected or unprotected. The Sector Protection
Register is user modifiable and must first be erased before it can be reprogrammed.
Table 9-3
illustrates the format of the Sector Protection Register.:
Note:
1. The default value for bytes 0 through 15 when shipped from Atmel
is 00H.
x = don’t care.
Table 9-2.
Sector Protection Register
Sector Number
0 (0a, 0b)
1 to 15
Protected
See
Table 9-3
FFH
Unprotected
00H
Table 9-3.
Sector 0 (0a, 0b)
0a
0b
Bit 3, 2
Data
Value
(Page 0-7)
(Page 8-255)
Bit 7, 6
Bit 5, 4
Bit 1, 0
Sectors 0a, 0b Unprotected
00
00
xx
xx
0xH
Protect Sector 0a
11
00
xx
xx
CxH
Protect Sector 0b (Page 8-255)
00
11
xx
xx
3xH
Protect Sectors 0a (Page 0-7), 0b
(Page 8-255)
(1)
11
11
xx
xx
FxH
相关PDF资料
PDF描述
AT45DB081D-SU 8-megabit 2.5-volt or 2.7-volt DataFlash
AT45DB081D-SU-2.5 8-megabit 2.5-volt or 2.7-volt DataFlash
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
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