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device id - please verify

Avi W
Expert 1345 points

Other Parts Discussed in Thread: MSP430F5437A, MSP430F5308

Hello,

After reading link and link we would like to verify:

For both MSP430F5308 and MSP430F5437A

  1. if we are looking for unique id of 8 bytes we could read both Low/wafer ID + Die X position + Die Y position and get 8 byte global Id.
  2. if we are looking for unique id of 6 bytes does Mark solution works?  
  3. if we are looking for unique id of 4 bytes we can't trust the 2 bytes Device Id + 2 other bytes like Die X and Die Y, we must use a commercial jtag as Jens-Michael  metioned

Please verify 1-3.

  • 0
    TI__Guru**** 222427 points
    Hello Avi,

    1. So long as you do not have to distinguish between different MSP430 variants then you can use the 8 bytes from the Lot/wafer ID + Die X position + Die Y position to get a global ID.

    2. As Mark comments, the upper bytes of the Die X and Y positions are typically zero. However this is not always the case. In reality only the upper 4 of 16 bits are spare while the rest are valid, therefore TI cannot ensure that a byte of information for Die X/Y apiece will result in a unique ID. Since all 4 bytes of the Lot/wafer ID are necessary a dependable unique identifier from the TLV consists of at least 7 bytes of information.

    3. 4 bytes is too few for a unique ID from the TLV and you will have to use FET programmer software like the MSP-GANG or FET-Pro430 to create your own unique device ID scheme.

    Regards,
    Ryan

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