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[kalsi]

Hello team,

Please see below question from the customer:

We are currently using S25FS512S and S25HL512T on our designs.

Our application requires the need to change the addressing mode from 3-bytes to 4-bytes and then back to 3-bytes. The difficulty we are having right now is changing the addressing mode from 4-bytes back to 3-bytes. 

Our understanding is that to exit 4-byte mode, we need either a HW or SW reset. Fortunately we don't have the HW reset connected to the processor, we need to go with the SW reset route. We are running our device in QSPI mode.

Is my understanding correct that we need to send the following commands?

Mode Bit Reset (MBR FFh)

Software Reset Enable (RSTEN 66h) 

Software Reset (RST 99h)   

Is there anything else we should be aware of?

[Yuvraj · Accepted solution]

Hi,


Thank you for contacting Infineon Technologies.

To exit from 4 byte addressing for S25HL512T, send B7h command can exit 4byte address directly, just like setting CFR2V[7]=0.

and 

For S25FS512S, there is no direct command, the soft reset command pair of 66h-99h can be used in this scenario.

Hope it helps.

Regards,

Yuvraj