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DWalk.3
Associate III
April 16, 2024
Solved

Last bytes of OTP written at factory for STM32WL5MOC

  • April 16, 2024
  • 4 replies
  • 1295 views

I'm using a custom board with the STM32WL5MOC. I've noticed that the last three 32-bit words of the OTP have been written to the values: 

FF FF FF FF FE FF FF FF 02 00 10 38 D1 DB AF 46

This makes the OTP 16 bytes shorter. Is this intentional, or is it a bug? 

This topic has been closed for replies.
Best answer by Tesla DeLorean

Or not their job... Open a support case, or talk to your local sales rep, or FAE

https://www.st.com/content/st_com/en/support/support-home.html

https://ols.st.com/s/

4 replies

DWalk.3
DWalk.3Author
Associate III
April 19, 2024

I wonder if this is done intentionally. There doesn't seem to be any way to distinguish between the module and STM32WLE5/STM32WL5x IC. This would be helpful for me as I'm migrating from the Seeed Studio Wio-E5 that uses the WLE module. They are different in that the LSE drive strengths differ; the Seeed Studio module uses a low drive, and the STM32WL5MOC uses a high drive for the LSE. It would be nice to be able to unambiguously tell what part is needed so I can set this appropriately. 

Barring that, I'll probably set the drive strength to high in both cases, and lower the drive strength once I peek inside the OTP to find the part number (that I write in manufacturing).

DWalk.3
DWalk.3Author
Associate III
April 22, 2024

I can only assume that the module development team at ST does not read this forum...

Tesla DeLorean
Tesla DeLoreanBest answer
Guru
April 22, 2024

Or not their job... Open a support case, or talk to your local sales rep, or FAE

https://www.st.com/content/st_com/en/support/support-home.html

https://ols.st.com/s/

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DWalk.3
DWalk.3Author
Associate III
April 23, 2024

I apologize to everyone for the snarky post. It was uncalled for. I had a fundamental misunderstanding of the purpose of the forum. In the future, I'll take the approach that @Tesla DeLorean suggested.