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MSP430G2332: Circuit design: What should I do with unused pins

Xiaoming Wang
Intellectual 490 points
Part Number: MSP430G2332

Hi, 

I am new to MSP430 MCUs. Here is my schematic.

Here are my questions:

1. What should I do with these unused pins like Pin 10, 11 and Pin 18, 19?

Do I let them floating or should I use pull-up/pull-down resistors(what value should I use)? 

2. What is the max sink/source current of P1 and P2 pins?

Regards,

Xiaoming

  • 0
    Intellectual 300 points

    Hello Xiaoming,

    Just leave the unused pins disconnect and make sure to set them as output low while software initialization. This make sure the pin input impedance is low (avoid the possibility of external signals coupling to the high inpedance input) and any current leaks.

    As for max current, I believe the maximum allowed is +/-6mA per pin, but there is a maximum +/-48mA maximum combined current for all pins.

    Gabriel

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