mx25l1635dzni-10g Macronix International Co., mx25l1635dzni-10g Datasheet - Page 10

• Manufacturer Part Number: mx25l1635dzni-10g
• Description: Serial Flash Memory
• Manufacturer: Macronix International Co.

P/N: PM1374
DATA PROTECTION
The MX25L1635D is designed to offer protection against accidental erasure or programming caused by spurious
system level signals that may exist during power transition. During power up the device automatically resets the
state machine in the standby mode. In addition, with its control register architecture, alteration of the memory con-
tents only occurs after successful completion of specific command sequences. The device also incorporates sev-
eral features to prevent inadvertent write cycles resulting from VCC power-up and power-down transition or system
noise.
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Valid command length checking: The command length will be checked whether it is at byte base and completed
on byte boundary.
Write Enable (WREN) command: WREN command is required to set the Write Enable Latch bit (WEL) before
other command to change data. The WEL bit will return to reset stage under following situation:
- Power-up
- Write Disable (WRDI) command completion
- Write Status Register (WRSR) command completion
- Page Program (PP) command completion
- Sector Erase (SE) command completion
- Block Erase (BE) command completion
- Chip Erase (CE) command completion
Deep Power Down Mode: By entering deep power down mode, the flash device also is under protected from
writing all commands except Release from deep power down mode command (RDP) and Read Electronic Sig-
nature command (RES).
Advanced Security Features: there are some protection and securuity features which protect content from inad-
vertent write and hostile access.
- The Software Protected Mode (SPM) use (BP3, BP2, BP1, BP0) bits to allow part of memory to be protected
as read only. The proected area definition is shown as table of "Protected Area Sizes", the protected areas are
more flexible which may protect various area by setting value of BP0-BP3 bits.
Please refer to table of "protected area sizes".
- The Hardware Proteced Mode (HPM) use WP#/SIO2 to protect the (BP3, BP2, BP1, BP0) bits and SRWD bit.
If the system goes into four I/O read mode, the feature of HPM will be disabled.
I. Block lock protection
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MX25L1635D
REV. 1.7, MAR. 30, 2009