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timothy0508
timothy0508
Associate II
December 21, 2020
Question

Reboot necessary after OTP write?

  • December 21, 2020
  • 1 reply
  • 601 views

I am using the STM32L432KCU for a project. I intend to use the OTP area for writing persistent device information (serial number, encryption keys, etc).

  1. Is a reboot necessary after writing to the OTP area?
  2. Can the OTP region be written to 32 bits at a time, or does it have be 64 bits?

Thanks

Tim

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1 reply

TDK
TDK
December 21, 2020

No reboot is necessary.

You can only write 64 bits at a time per the reference manual (technically 72 with ECC included).

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