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Original question:

LP-XDS110: TMS320F28384D + LP - XDS110

TMS320F28379D: Program/Debug TMS320F28379D using LP-XDS110 10-pin header

Vinicius Ramos
Prodigy 10 points

Part Number: TMS320F28379D
Other Parts Discussed in Thread: LP-XDS110

Hi,

Is it possible to debug and program my TMS320F28379D custom board using only the 10-pin header in the LP-XDS110? The nTRST pin from the microcontroller is pulled-down by a 2.2k resistor and is not connected to the 10-pin header (only TMS, TCK, TDO, TDI, nRST, GND and +3.3V are). I have attached an image of my schematic below.

image.png

I can manually pull the nTRST pin high with a jumper to a stronger pull-up resistor if needed. Would it be necessary to pull the pin high when programming or debugging?

I can also connect the nTRST pin to a pin from the LP-XDS110 20-pin connector, but there is no pin labeled nTRST. Is there a nTRST pin in the 20-pin connector?

Thanks in advance; any help is appreciated.

  • 0
    TI__Mastermind 23601 points

    Hi Vinicius,

    You should pull the nTRST signal high and then connect the JTAG signals directly from the LP-XDS110 to the F28379D board. The nRST pin on the LP-XDS110 is a different signal and is intended to be used with MSP devices. You would only need TMS/TCK and optionally TDI and TDO (if not using cJTAG)


    Regards,

    Peter