N25Q128A13BSF40F NUMONYX, N25Q128A13BSF40F Datasheet - Page 47

• Manufacturer Part Number: N25Q128A13BSF40F
• Description: IC SRL FLASH 128MB NMX 16-SOIC
• Manufacturer: NUMONYX
• Series: Forté™r

Specifications of N25Q128A13BSF40F

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 128M (16M x 8)
• Speed: 108MHz
• Interface: SPI, 3-Wire Serial
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

N25Q128 - 3 V
Table 9.
0
0
1
1
Lock Down bit
Sector Lock Register
SPM1
The first software protected mode (SPM1) is managed by specific Lock Registers assigned
to each 64 Kbyte sector.
The Lock Registers can be read and written using the Read Lock Register (RDLR) and
Write to Lock Register (WRLR) instructions.
In each Lock Register two bits control the protection of each sector: the Write Lock bit and
the Lock Down bit.
The definition of the Lock Register bits is given in
SPM2
The second software protected mode (SPM2) uses the Block Protect bits (BP3, BP2, BP1,
BP0) and the Top/Bottom bit (TB bit) to allow part of the memory to be configured as read-
only. See
Software protection truth table (Sectors 0 to 255, 64 Kbyte granularity)
As a second level of protection, the Write Protect signal (applied on the W/VPP pin) can
freeze the Status Register in a read-only mode. In this mode, the Block Protect bits (BP3,
BP2, BP1, BP0), the Top/Bottom (TB) bit, and the Status Register Write Disable bit (SRWD)
are protected.
If a sector is write locked or/and locked-down during an sector erase suspend of the same
sector or subsector erase suspend in the same sector, then the locking status bits are
changed immediately, but when the erase is resumed, the erase operation completes. After
erase completion the sector lock register content will affect the sector protection status.
Locking operations cannot be performed during a program suspend.
0
1
0
1
Write Lock bit
Write Lock bit: The Write Lock bit determines whether the contents of the sector can be
modified (using the Program or Erase instructions). When the Write Lock bit is set to '1',
the sector is write protected - any operations that attempt to change the data in the
sector will fail. When the Write Lock bit is reset to '0', the sector is not write protected by
the Lock Register, and may be modified.
Lock Down bit: The Lock Down bit provides a mechanism for protecting software data
from simple hacking and malicious attack. When the Lock Down bit is set to '1', further
modification to the Write Lock and Lock Down bits cannot be performed. A powerup is
required before changes to these bits can be made. When the Lock Down bit is reset to
'0', the Write Lock and Lock Down bits can be changed.
Section 16: Ordering
Sector unprotected from Program/Erase operations, protection status
reversible.
Sector protected from Program/Erase operations, protection status reversible.
Sector unprotected from Program/Erase operations.
Sector protection status cannot be changed except by a power-up.
Sector protected from Program/Erase operations.
Sector protection status cannot be changed except by a power-up.
information.
Micron Technology, Inc., reserves the right to change products or specifications without notice.
Protection Status
Table 22.: Lock Register
©2010 Micron Technology, Inc. All rights reserved.
Protection modes
out.
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