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4-wire JTAG with the MSP430F1612

Raphael mgeladse
Prodigy 40 points
Other Parts Discussed in Thread: MSP430F1612, MSP-FET

Hey Folks,

i have an probably usual problem to debugg my MSP430F1612 MCU with the 4-Wire JTAG configuration with CCS. I  Chose to power the MSP over the Debugger, with the pullup resistor R1 = 4.7k and the capacito C1= 2.2nF. CCS Error massage is" Error connecting to taget: Unknown Device". I cant figure out whats the problem is, and really hope somebody can help.

Cheer friends

  • 0
    TI__Guru**** 208857 points
    Hey Raphael,

    It does not seem like you are using a typical 14-pin JTAG connector, please make sure you are using the same FET connections as Figure 2-1 of the MSP430 Hardware Tools User's Guide (SLAU278): www.ti.com/.../slau278y.pdf

    What type of FET tool are you using? Make sure that all of your JTAG connections are as short as allowable, that Vcc is being steadily supplied by the FET, and that the RST line is pulled up. Please also provide a board layout image and oscilloscope screenshots of the JTAG communication if possible.

    Regards,
    Ryan
  • 0 in reply to Ryan Brown1
    Prodigy 40 points

    Ryan,

    thank you so much for your reply. I'm using a connector-Adapter TC2050  from Tag-Connect, because space is of the assence in my project. As for the Debugger, i'm using the MSP-FET Flash Emulation Tool. For now, i can't provide an oscillosope screenshoot  but i'll try to do that as soon as possible.

    Please have a look at the layout and tell me if you see somthing odd. The red colored line is Vcc, blue RST

    cant thank you enouth

    Rapha

    Raphael

  • 0 in reply to Raphael mgeladse
    TI__Guru**** 208857 points
    I don't initially see anything out of the ordinary (so long as the connector is oriented properly) but it is hard to tell, I've never used the TC2050 connector before. I'll be curious to see what information we can gather from the oscilloscope screenshots.

    Regards,
    Ryan
  • 0 in reply to Ryan Brown1
    Prodigy 40 points
    I solved it. The problem was that i had JTAG and MCU on diffrent GND potential and therefor a inefficient voltage supply.
    Thank you again Ryan for your quick response and willingness to help.

    Cheers my engineer friends.

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