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Using MSP430G2533

Fred Mueller
Prodigy 50 points

I would like to use a MSP-EXP430G2533 Launchpad to program the processor and then remove the processor and use it in a stand alone circuit.  When I power up the processor in the stand alone circuit, it does not appear to be functioning.  Do I need to use the Xin and Xout with an external crystal in order for the processor to operate?  Looking at the Launchpad board, it does not appear that a crystal is present although there are resistors in the leads out of the processor.  I guess my question is -- how do it make the chip work outside of the Launchpad environment?.

Any help will certainly be appreciated.

  • 0
    Guru 58965 points
    Your stand alone circuit must include a suitable power supply. It must include a resistor (47K or less) to pull-up the RST pin. It must not pull-up or drive the TEST pin. And it must include other components as needed by your code.
  • 0 in reply to old_cow_yellow
    Intellectual 335 points

    Dear Fred,

    already answered above, but I like to repeat:

    Pls check document

    www.ti.com/.../slau278y.pdf

    on page 23 and others - other pages, other documents.

    A high frequency crystal is used for processor control directly made from xtal. A 32kHz crystal is used for frequency multiplications and PLL/DCO applications, and calibration data for DCO let run the oscillator without any xtals.

    Happy coding!

    Bernd

  • 0
    Prodigy 50 points
    Thanks for the quick reply. Problem was the need to pull up the reset pin. I had spent several hours pouring over the various TI documents and never did come across that fact. Works fine now.

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