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MSP-EXP430G2 LaunchPad Experimenter board

Joy Tan
Expert 1175 points

Hello,

Just to confirm we do not need any pullup or pulldown resistor for programming right?

 

1)On the target board, do we need to have pullup/pulldown /series resistor on these lines for programming purpose?

 

2) On the target board, if P1.1 and P1.2 are used for GPIO, do they need to have series resistors for loading to avoid programming error?

  • 0
    TI__Guru 73226 points

    Hi Joy,

    1)Which lines are you referring to? All of the necessary hardware for doing Spy-bi-wire programming using the on-board emulation is already on the board, you just need to make sure that jumpers are in place on TEST, RST and VCC on J3. You won't need to add additional pull-ups anywhere, but if you look at the schematic in the user's guide (p. 15) you'll see that there are some pull-ups/pull-downs already on TEST & RST on the emulation section of the board and on RST in the target section of the board. Unless you are removing these, you should be fine.

    2) P1.1 and P1.2 are only used for the "backchannel UART" to allow users to communicate some data with a PC COM port if they'd like, but these lines are not necessary for programming/debugging. If you want to use them as GPIO to do something different you should simply remove the TXD and RXD jumpers on J3. The only lines that are really  necessary for programming using the on-board emulation are TEST, RST, and VCC (and GND, but this is connected already in the board).

    Regards,

    Katie

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