S25FL116_WRDI_0x04

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Anonymous
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What is the use of Write Disable (WRDI 0x04) command in S25FL116K flash  function.

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BushraH_91
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750 replies posted 50 likes received 250 solutions authored

Hello Baskar,

Thank you for contacting Cypress Community Forum. The Write Disable command resets the Write Enable Latch (WEL) bit in the Status Register to a 0. The Write Disable command is entered by driving CS# low, shifting the instruction code “04h” into the SI pin and then driving CS# high. Note that the WEL bit is automatically reset after Power-up and upon completion of the Write Status Registers, Erase / Program Security Registers, Page Program, Sector Erase, Block Erase and Chip Erase commands. A write disable state occurs upon power-up or after any of the following commands: Write Disable, Page Program, Sector Erase, Block Erase, Chip Erase, Write Status Registers, Erase Security Register and Program Security Register.

Thank you

Regards,

Bushra

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BushraH_91
Moderator
Moderator
Moderator
750 replies posted 50 likes received 250 solutions authored

Hello Baskar,

Thank you for contacting Cypress Community Forum. The Write Disable command resets the Write Enable Latch (WEL) bit in the Status Register to a 0. The Write Disable command is entered by driving CS# low, shifting the instruction code “04h” into the SI pin and then driving CS# high. Note that the WEL bit is automatically reset after Power-up and upon completion of the Write Status Registers, Erase / Program Security Registers, Page Program, Sector Erase, Block Erase and Chip Erase commands. A write disable state occurs upon power-up or after any of the following commands: Write Disable, Page Program, Sector Erase, Block Erase, Chip Erase, Write Status Registers, Erase Security Register and Program Security Register.

Thank you

Regards,

Bushra

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Anonymous
Not applicable

Is it necessary to use Write Disable (WRDI 0x04) command in S25FL116K flash  function "Explicitly" after every write operation.

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BushraH_91
Moderator
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Moderator
750 replies posted 50 likes received 250 solutions authored

Hello Basker,

No. WEL latch is disabled every write/program. Please refer to section 9.1.4 on the datasheet.

Thank you and have a wonderful weekend

Regards,

Bushra

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