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TMS320F28035-Q1：The problem of using XDS110ISO-EVM in reset

lewis ding
Prodigy 130 points

Part Number: TMS320F28035-Q1
Other Parts Discussed in Thread: XDS110ISO-EVM, TMS320F28035

Tool/software:

I'm using the XDS110ISO-EVM for the first time to debug a TMS320F28035 application in CCS version 12.8. However, because the debugger lacks the TRSTn pin, it keeps displaying the error shown below. How can I resolve this issue?

  • 0
    Prodigy 130 points

    The upper diagram shows the error that occurs when the target's TRST pin is pulled to 3.3V, while the lower diagram shows the error that occurs when the TRST pin is left floating:

  • 0 in reply to lewis ding
    TI__Mastermind 20380 points

    Hello,

    • If nTRST is held low, then the JTAG state machine will always be in the Test-Logic-Reset state. JTAG communication will not work. 
    • If nTRST is held high, then the JTAG programmer is able to change the JTAG states with TCK/TMS and it will be able to communicate properly.

    If you do not have the ability to get nTRST from the debug probe, you should be able to just pull nTRST high while you are programming the device.

    lewis ding said:
    The upper diagram shows the error that occurs when the target's TRST pin is pulled to 3.3V

    What boot mode do you have configured? Are you able to pass the Test Connection in the target configuration when nTRST is high?

    Best,

    Matt

  • 0 in reply to Matt Kukucka
    TI__Mastermind 20380 points

    Hello,

    Since it's been a month without a reply, I'll assume the issue is resolved and close the thread.

    Best,

    Matt