MSP430G2553: Status of GPIO during reset

Chris Indo

Part Number: MSP430G2553

When the MCU is in reset due to the RST pin being pulled low, what is the state of the GPIO? Do they default to floating inputs? or....?

Thank You!

over 4 years ago

0 Dennis Lehman over 4 years ago

TI__Guru 60151 points

Hi Chris,

According the MSP430x2xx users guide, GPIO are initialized as inputs. It is recommended that you set any "unused" GPIO as an output and set = 0 to prevent power consumption due to the floating inputs.

0 Chris Indo over 4 years ago in reply to Dennis Lehman

Intellectual 300 points

Hi.

Thanks for the fast response. Noted that they are inputs. I presume PxDIR and PxREN are also reset in such a way that the pull-up/down resistor is disable so that the input is essentially floating?

0 Dennis Lehman over 4 years ago in reply to Chris Indo

TI__Guru 60151 points

Hi Chris,

Yes, you are correct.

0 Chris Indo over 4 years ago in reply to Dennis Lehman

Intellectual 300 points

Thank you, Dennis. That would explain what I have been seeing

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MSP430G2553: Status of GPIO during reset