AT25SL321 datasheet(14/82 Pages) RENESAS

Part #	AT25SL321

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

PDF	82 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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14 / 82 page

DS-AT25SL321-112 Rev. J

Page 14

Nov 1, 2022

AT25SL321 Datasheet

Write Protection

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

6.1

Write Protect Features

▪ While Power-on reset, all operations are disabled and no command 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 Register and the Write Status Register commands.

▪ For data changes, Write Enable command 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 commands are

ignored under this status except for Release Deep Power Down command.

AT25SL321 Datasheet(PDF) 14 Page - Renesas Technology Corp