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MSP430G2352 JTAG

Other Parts Discussed in Thread: MSP430G2352

customer said:

I'm having trouble deciphering the correct JTAG connections to use on the MSP430G2352 because the pin names of the part do not match the pin names referenced in application note SLAU278H.

Diagram from SLAU278H attached.

SLAU278 has:

  • RST/NMI
  • TDO/TDI
  • TDI/VPP
  • TMS
  • TCK
  • TEST/VPP

 MSP430G2352 has:

  • RST/NMI/SBWTDIO
  • TDO/TDI
  • TDI/TCLK
  • TMS
  • TCK
  • TEST/SBWTCK

 Can you please verify the following connections?

RST/NMI    <->    RST/NMI/SBWTDIO
TDO/TDI    <->    TDO/TDI
TDI/VPP    <->     TDI/TCLK
TMS         <->     TMS
TCK          <->     TCK
TEST/VPP  <->     TEST/SBWTCK

Yes, pins can often be multiplexed.  How well does this guide give you the distilled information you're looking for?

MSP430 Programming Via the JTAG Interface (Rev. C)

  •  Hi Jason, I experienced trouble too with UIF connection, JTAG connector behave differently if used in SBW or JTAG mode, so pin need be swapped. Again reset circuits give a lots of probem when capacitor exceed 2n2F but also low capacitance can be a trouble in debugging, why not modify circuit diagram to include a 1K resistor between RC node and reset jtag connection?

     Again Olimex JTAG connector use pin as they are, Elprotronics permit swap them but follow TI UIF as primary rule, a lot of confusion is generated to who come from old 1xxx and 4xxx series SBW-less.

     Regards

     Roberto

  • Roberto Romano said:

    Again reset circuits give a lots of probem when capacitor exceed 2n2F but also low capacitance can be a trouble in debugging, why not modify circuit diagram to include a 1K resistor between RC node and reset jtag connection?

    The recommneded RC cucuit values can be found in the User's Guide for the MSP430 device you're using.  For example, with the MSP430G2352 here is the reference.

    MSP430x2xx Family User's Guide (Rev. I)  (PDF 4314 KB)  24 Jan 2012
    Page 44 of 658

  •  

    Hi Jason, sorry, this way no more trouble with reset circuit and SBW C1 can be raised to 100nF without problem.

     Regards

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