• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 82 subscribers
  • Views 622 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TMS320F280039: UID_UNIQUE (0x000701F4) Address not seeming valid

Surya Prakash95
Intellectual 260 points
Part Number: TMS320F280039


Dear Team,

I am using F280039 controller. From the datasheet i could see the UID address is 0x000701F4, but the corresponding location reads always 0xFFFF.

We also use F280025 where the same address reflects the UID correct, but we see the same location wrong for F280039. Could you please confirm the correct address for F280039 devices ?

Thanks
Surya

  • +1
    TI__Genius 11081 points

    (Edit: corrected a slight inaccuracy below)

    Hello Surya,

    This appears to be an error in the data sheet. I will file a ticket for our team to get this fixed.

    The correct user OTP address for the UniqueID values is 0x70200. The first 192bits are a pseudo-random value that can be used for certain cryptographic functions (e.g. initializing the AES CTR mode as a PRNG), the next 32 bits are a unique ID number, and the last 32 bits are a checksum. These addresses are documented as UID_REGS registers (under system control) for application use. These are all correctly documented in the device TRM (see sections 5.7.2, 3.16, 3.16.16).

    Best regards,
    Ibukun

  • 0 in reply to Ibukun Olumuyiwa
    Intellectual 260 points

    Thanks Ibukun for your support and clear explanation :)That clarifies, wish you a nice day