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TMS320F28386S: TRSTn Pin JTAG F28386SPTPQR + XDS200

Thomas Eckstein
Prodigy 80 points
Part Number: TMS320F28386S


Hello,

I have a question regarding the F28386SPTPQR.

We are using the F28386SPTPQR together with an XDS200 programmer. On our current adapter, the TRSTn pin is unfortunately not routed out.
Is the TRSTn pin strictly required for programming the controller, or is flashing possible without this pin?

Thank you and best regards,
Thomas

  • +1
    TI__Genius 12390 points

    Hi Thomas,

    The requirement for the TRSTn pin when programming the MCU is that it is driven high when you want to give the programmer control of the device. TRSTn must be driven low for the device to operate in its functional mode.

    If you can't connect this pin to your debugger, you need to drive the TRSTn pin at the board level in order to allow the MCU to enter JTAG programming mode. 

    Regards,

    Brennan 

  • 0 in reply to Brennan Hartigan
    Prodigy 80 points

    Hi Brennan,

    ok, this helps, thanks a lot!

    So I need to make a new adapter that connects that TRSTn pin to the Programmer.

    Best regards,
    Thomas

  • 0 in reply to Thomas Eckstein
    TI__Genius 12390 points

    Thomas,

    You can make a new adapter that connects TRSTn to the programmer, or have some method of driving the TRSTn pin high/low at the board level (it does not necessarily need to be from the programmer hardware, but if this is not too challenging, then I would recommend you go that route).

    Regards,

    Brennan