Post #2857977
2026-04-17 15:39 UTC
any SPI flash experts?
either winbond smokes bad stuff, or I accidentally broke their security or JLC mounts counterfeit parts.
this is a 16MB flash, specifically a winbond W25Q128JVSIQ.
usually you R and W the 16MB and that's it.
but the device has also "security registers" 1-3
in each of the three "regs" you can write 256 bytes, and optionally lock them.
I used this feature, in SR1 I place a URL, and a serial number and a UUID, etc.I didn't touch SR2 and 3.
now three is a odd number
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