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TMS320F28067: JTAG schematic review

Howard Zou
Genius 12365 points
Part Number: TMS320F28067

Hi,

my customer has load 500pcs F28067 and 6pcs have been locked for unknown reason.

Could you please help check if there is any risk for the JTAG?

  • +1
    TI__Guru* 75800 points

    Howard,

    I think the JTAG looks OK from a schematic perspective; I would make sure that the trace lengths are not in excess of a few inches as well.

    In terms of the flash password getting mis-programmed I would look at the power rails and state of XRSn during the programmation to see if those could have caused an interruption during programming.

    Best,

    Matthew