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Nor Flash

New Contributor II

Hello,

Micron W29DW Flash has reset command (F0) of 1-Cycle and 3-cycle.

1-cycle:

Adder | Data

x | F0

3-cycle:

555 | AA

2AA | 55

x | F0

Now, customers are considering changing from Micron to Cypress's S29GL128S.

According to the data sheet, GL-S supports only 1-cycle reset command (F0).

If 3-cycle reset command is issued, will GL-S Flash execute reset?

Or is this command ignored?

Best Regards,

Naoaki Morimoto

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1 Solution
Employee

Hello Morimoto-san,

The reset command with the two unlock cycles which you're referring to is used as a "Write Buffer Abort Reset command" for the GL-S case.

This command (0xAA + 0x55 + 0xF0) will clear the status register and return to normal operation.

I have just tested both commands on real silicon and they had the same effect.

So you can use both commands for a reset.

Thanks!

Best regards,

Bacem

----

Bacem Daassi

Customer Application Engineering

Cypress Semiconductor Corp.

View solution in original post

2 Replies
Employee

Hello Morimoto-san,

The reset command with the two unlock cycles which you're referring to is used as a "Write Buffer Abort Reset command" for the GL-S case.

This command (0xAA + 0x55 + 0xF0) will clear the status register and return to normal operation.

I have just tested both commands on real silicon and they had the same effect.

So you can use both commands for a reset.

Thanks!

Best regards,

Bacem

----

Bacem Daassi

Customer Application Engineering

Cypress Semiconductor Corp.

View solution in original post

New Contributor II

Hello Bacem-san,

Thank you for your answer. I understand it.

Best Regards,
Naoaki Morimoto

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