AT25QL321 datasheet(10/79 Pages) DIALOG

Part #	AT25QL321

Description	32-Mbit, 1.7V Minimum SPI Serial Flash Memory with Dual I/O, Quad I/O and QPI Support

PDF	79 Pages

Scroll/Zoom	100%

Manufacturer	DIALOG [Dialog Semiconductor]

Direct Link	http://www.dialog-semiconductor.com/

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10 / 79 page

AT25QL321

DS-25QL321–131C–5/2017

Write Protection

To protect inadvertent writes by the possible noise, several means of protection are applied to the Flash memory.

5.1

Write Protect Features



While Power-on reset, all operations are disabled and no instruction is recognized.



An internal time delay of tPUW can protect the data against inadvertent changes while the power supply is outside

the operating specification. This includes the Write Enable, Page program, Block Erase, Chip Erase, Write Security



For data changes, Write Enable instruction must be issued to set the Write Enable Latch (WEL) bit to “0”. Power-

up, Completion of Write Disable, Write Status Register, Page program, Block Erase and Chip Erase are subjected to

this condition.



Write Protect (WP) pin can control to change the Status Register under hardware control.



The Deep Power Down mode provides extra protection from unexpected data changes as all instructions are ignored

under this status except for Release Deep Power Down instruction.

AT25QL321 Datasheet(PDF) 10 Page - Dialog Semiconductor