MSP430F5659IPZ and IPZR

Kosta Logutin

I currently have board designed with MSP430F5359IPZ and looking to populate it with MSP430F5659IPZ. Only thing is PUR pin is floating in current design. Will I have any issues with device working during power cycles or any other functions like programming? In datasheet they recommend 1M resistor to ground but I would like to know the impact of leaving this pin floating.

over 3 years ago

0 Brandon Fisher94 over 3 years ago

TI__Mastermind 28075 points

Hi Kosta,

Thanks for your post.

The PUR pin is checked after BOR to decide whether or not to invoke BSL, so if you leave it floating you could erroneously see the device enter BSL Mode. Your program would not execute correctly in this case.

I would strongly recommend tying it to ground with that resistor.

Best Regards,
Brandon Fisher

+1 Kosta Logutin over 3 years ago in reply to Brandon Fisher94

Prodigy 110 points

Thank you!

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MSP430F5659IPZ and IPZR