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256Mb, 512Mb, 1Gb, 2Gb: 3V Embedded Parallel NOR Flash
Protection Operations
Figure 11: Program/Erase Nonvolatile Protection Bit Algorithm
Start
ENTER Nonvolatile
Protection
COMMAND SET
PROGRAM Nonvolatile
Protection Bit
Addr = BAd
Read byte twice
Addr = BAd
DQ6 = Toggle
Yes
No
No
DQ5 = 1
Yes
Read byte twice
Addr = BAd
Wait 500μs
DQ6 = Toggle
Yes
No
Read byte twice
Addr = BAd
Fail
Reset
No
DQ0 =
1 (erase)
0 (program)
Yes
Pass
EXIT PROTECTION
COMMAND SET
PDF: 09005aef849b4b09
m29ew_256mb_2gb.pdf - Rev. B 8/12 EN
42
Micron Technology, Inc. reserves the right to change products or specifications without notice.
? 2012 Micron Technology, Inc. All rights reserved.
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