AT45D01SSHB1D--B View Datasheet(PDF) - Unspecified
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Description
Manufacturer
AT45D01SSHB1D--B Datasheet PDF : 51 Pages
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AT45DB011D
Table 9-1. WP Pin and Protection Status
Time
Period
1
2
3
WP Pin
High
Low
High
Enable Sector Protection
Command
Command Not Issued Previously
–
Issue Command
X
Command Issued During Period 1
or 2
–
Issue Command
Disable Sector
Protection Command
X
Issue Command
–
X
Not Issued Yet
Issue Command
–
Sector Protection
Status
Disabled
Disabled
Enabled
Enabled
Enabled
Disabled
Enabled
Sector
Protection
Register
Read/Write
Read/Write
Read/Write
Read Only
Read/Write
Read/Write
Read/Write
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 4-bytes of data, of which byte locations 0 through 3 contain values that specify
whether sectors 0 through 3 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.
Table 9-2. Sector Protection Register
Sector Number
Protected
Unprotected
0 (0a, 0b)
See Table 9-3
1 to 3
FFH
00H
Table 9-3. Sector 0 (0a, 0b)
0a
0b
(Page 0-7)
(Page 8-127)
Bit 7, 6
Bit 5, 4
Bit 3, 2
Bit 1, 0
Sectors 0a, 0b Unprotected
00
00
xx
xx
Protect Sector 0a
11
00
xx
xx
Protect Sector 0b (Page 8-127)
00
11
xx
xx
Protect Sectors 0a (Page 0-7), 0b
(Page 8-127)(1)
11
11
xx
xx
Note: 1. The default value for bytes 0 through 3 when shipped from Adesto is 00H.
x = don’t care.
Data
Value
0xH
CxH
3xH
FxH
13
3639M–DFLASH–11/2017
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