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Nor Flash Forum Discussions

degac_4002871
Level 1
Level 1

Hi, I have a NOR flash S25FL128S. ID information is read, but I can not program and erase.

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4 Replies
SudheeshK
Moderator
Moderator
Moderator
250 sign-ins First question asked 750 replies posted

Hi,

Could you please provide more details about this issue?

1. Please explain how you test and observe this failure in detail?

2. Are you sending WREN command before program/erase operations?

3. How many devices did you test? Are you observing this issue with all of them?

4. Please provide the command sequence that you follow for both program and erase operations.

5. Can you share the waveform for program and erase operations?

Thanks and Regards,

Sudheesh

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1. send WREN

2. status register =  0x02

3. erase sector

4. status register = 0x00

5. send WREN

6. status register =  0x02

7. write flash

8. status register = 0x00

9. config register = 0x00

10. asp reg = 0x7F

11. ppb reg = 0xFF

12. id = 0x01  0x17

13.RDID = 0x01 0x20 0x18 etc.

14. read flash = 0xFF 0xFF 0xFF etc.

Tested 2 devices.

I connect device to STM32.

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Hi,

As I requested in my previous response, can you share the waveform for WREN, Program and Erase operations?

Thanks and Regards,

Sudheesh

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no i don`t

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