TMS320F28377D: Use reserved OTP from key storage

Hang Yang

Expert 3696 points

Part Number: TMS320F28377D

Tool/software:

Hi Experts,

My customer wants to use OTP for custom key storage. There are two ideas:

Although OTP is assigned for DCSM, there are some reserved locations, can they use reserved locations to store their own key?
Use one of the old zone block for custom key, and use a new block for actual DCSM function.

Is the above solution possible?

Regards,

Hang.

over 1 year ago

0 Joseph Casuga over 1 year ago

TI__Mastermind 43070 points

Hi Hang,

Can you point to the reserved address that customer is planning to use?

Thanks,

Joseph

0 Hang Yang over 1 year ago in reply to Joseph Casuga

TI__Expert 3696 points

0 Hang Yang over 1 year ago in reply to Hang Yang

TI__Expert 3696 points

Hi Joseph，

See above picture for reserved address.

Meanwhile, they only use zone 1, can they use inactive zone block (zone 1 blcok that not chosen by link pointer/block in zone2 )to store custom key？

0 Joseph Casuga over 1 year ago in reply to Hang Yang

TI__Mastermind 43070 points

Hi Hang,

Yes, customer can use the reserved spaces indicated in zone 1. Also if customer is not using zone 2, spaces from 0x78200 to 0x78216 can be used for their custom key.

Regards,

Joseph

0 Hang Yang over 1 year ago in reply to Joseph Casuga

TI__Expert 3696 points

Hi Joseph

Customer needs 65 words for key storage. can they use 0x78220 - 0x783f0 if they are not using zone 2?

Regards,

Hang

0 Joseph Casuga over 1 year ago in reply to Hang Yang

TI__Mastermind 43070 points

Hi Hang,

If customer has access to those locations, then it is worth giving it a shot on a few parts first.

Best regards,

Joseph

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TMS320F28377D: Use reserved OTP from key storage