256Mb, 512Mb, 1Gb, 2Gb: 3V Embedded Parallel NOR Flash
Protection Operations
A block can be protected from program or erase by issuing a PROGRAM NONVOLATILE
PROTECTION BIT (A0h) command, along with the block address. This command sets
the nonvolatile protection bit to 0 for a given block.
The status of a nonvolatile protection bit for a given block or group of blocks can be
read by issuing a READ NONVOLATILE MODIFY PROTECTION BIT command, along
with the block address.
The nonvolatile protection bits are erased simultaneously by issuing a CLEAR ALL
NONVOLATILE PROTECTION BITS (80/30h) command. No specific block address is re-
quired. If the nonvolatile protection bit lock bit is set to 0, the command fails.
PDF: 09005aef849b4b09
m29ew_256mb_2gb.pdf - Rev. B 8/12 EN
41
Micron Technology, Inc. reserves the right to change products or specifications without notice.
? 2012 Micron Technology, Inc. All rights reserved.
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