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