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part number: S25FL127SABMFV101
Our board is using S25FL127S flash memory.
I repeatedly turned the power on and off during the testing process.
The flash memory is protected by quickly repeating the above process
Other than flash memory, everything works normally.
I tried the review, but I could not find the cause.
1. OK state
Reg Addr / Data
0x35 : 02
0x05 : 00
2.NG state
Reg Addr / Data
0x35 : c2
0x05 : 9c
0x35 : Configuration Register 1 (CR1)
0x05 : Status Register 1 (SR1)
Is the status of the flash memory normal?
please tell me why flash memory is protected.
Thank you.
Solved! Go to Solution.
- Labels:
-
Parallel NOR
-
Serial NOR
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Hello HS Jeon,
it is suspected that the flash device couldn't complete an flash internal initialization process during your power off/on cycles. it leads further array data access or SR/CR have incorrect settings temporarily. You may need to check the power-up/down voltage and timing in below, which also can be seen on S25FL127S datasheet.
Best regards,
Scott
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Hello HS Jeon,
it is suspected that the flash device couldn't complete an flash internal initialization process during your power off/on cycles. it leads further array data access or SR/CR have incorrect settings temporarily. You may need to check the power-up/down voltage and timing in below, which also can be seen on S25FL127S datasheet.
Best regards,
Scott