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MSP430G2553: Vcc pin of chip broken? how to fix?

Diptangshu Sen
Prodigy 220 points
Part Number: MSP430G2553
Other Parts Discussed in Thread: ENERGIA

While trying to remove the chip from the development board, accidentally the Vcc pin broke off. I tried to fix it by putting it on a breadboard and ensuring contact through the broken end of a wire. But, the delays do not seem to working properly. For a delay of 1 second, I am getting huge delays of excess of 5 seconds. Today, it completely stopped working. Is ther no way to fix the thing permanently?

  • 0
    Guru 46710 points

    You can cut pin off another DIP IC you don't need and carefully solder it to broken pin - in case tip of the pin broke off. If it broke off completely close to case then I am afraid that only option for you is to buy new one or request as an sample from TI. Make sure you get DIP package, MSP430G2553IN20

  • 0 in reply to Ilmars
    Prodigy 220 points
    how to use the the micro-crystal that comes along with the msp430g2 launchpad? Does it have anything to do with the delays not working properly?
  • 0 in reply to Diptangshu Sen
    Guru 46710 points
    It depends. It is needed only if you want to use LFXT1 oscillator. Absence of crystal on the board could be cause of delays not working properly *IF* delays depend on LFXT1 oscillator. Some source code examples do need crystal to be soldered, some do not. As you don't tell how exactly you are doing delays - I can't tell for sure.
  • 0 in reply to Ilmars
    Prodigy 220 points
    I was trying to install the broken MSP430G2553 chip on a breadboard, with a makeshift pin for the broken pin. I was able to program the broken chip through the onboard emulator with a simple blink program. The led is blinking, but the delays are not working properly. I put in a delay of 1000 microseconds in the energia code between the blinks, but in reality, the delay is much higher, although the ratio of the on and off periods is still the same. Why is this happening? Is it due to the brokrn pin? Can it be fixed with the microcrystal?
  • 0 in reply to Diptangshu Sen
    Guru 46710 points

    If everything is done properly, no delays shall change. Better put your chip back into development board and ensure that chip indeed receives power through VCC pin, not any other pin. Now with broken pin, chip on breadboard, you using unknown code using Energia - there's so many variables that it is very hard to tell what exactly wrong in your setup and why delays are longer than you expect.

    If microcrystal is soldered on devboard where delays worked and absent on breadboard, then cause of wrong delays is obvious :)

  • 0 in reply to Ilmars
    TI__Expert 4695 points
    I highly recommend to replace the chip with the broken pin with a new one!
    You never know what can happen due to lack of contact.
    Make your life easier and order a new one.

    Best regards
    Lukas

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