N25Q064A13ESF40G Datasheet, PDF (14/81 Pages) Micron Technology – Micron Serial NOR Flash Memory 3V, Multiple I/O, 4KB Sector Erase

Device Protection
64Mb, 3V, Multiple I/O Serial Flash Memory
Device Protection
Table 3: Data Protection using Device Protocols
Note 1 applies to the entire table
Protection by:
Power-on reset and internal timer
Command execution check
WRITE ENABLE operation
Description
Protects the device against inadvertent data changes while the power supply is out-
side the operating specification.
Ensures that the number of clock pulses is a multiple of one byte before executing a
PROGRAM or ERASE command, or any command that writes to the device registers.
Ensures that commands modifying device data must be preceded by a WRITE ENABLE
command, which sets the write enable latch bit in the status register.
Note: 1. Extended, dual, and quad SPI protocol functionality ensures that device data is protec-
ted from excessive noise.
Table 4: Memory Sector Protection Truth Table
Note 1 applies to the entire table
Sector Lock Register
Sector Lock
Down Bit
Sector Write Lock
Bit
Memory Sector Protection Status
0
0
Sector unprotected from PROGRAM and ERASE operations. Protection status re-
versible.
0
1
Sector protected from PROGRAM and ERASE operations. Protection status rever-
sible.
1
0
Sector unprotected from PROGRAM and ERASE operations. Protection status not
reversible except by power cycle or reset.
1
1
Sector protected from PROGRAM and ERASE operations. Protection status not
reversible except by power cycle or reset.
Note: 1. Sector lock register bits are written to when the WRITE LOCK REGISTER command is exe-
cuted. The command will not execute unless the sector lock down bit is cleared (see the
WRITE LOCK REGISTER command).
Table 5: Protected Area Sizes – Upper Area
Note 1 applies to the entire table
Status Register Content
Top/
Bottom
Bit
BP3
BP2
BP1
BP0
0
0
0
0
0
0
0
0
0
1
0
0
0
1
0
0
0
0
1
1
0
0
1
0
0
0
0
1
0
1
Memory Content
Protected Area
None
Upper 128th
Upper 64th
Upper 32nd
Upper 16th
Upper 8th
Unprotected Area
All sectors
Sectors (0 to 126)
Sectors (0 to 125)
Sectors (0 to 123)
Sectors (0 to119)
Sectors (0 to 111)
PDF: 09005aef845665f4
n25q_64mb_3v_65nm.pdf - Rev. K 08/13 EN
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