MPC5676R: How to handle unconnected pins?

[allisonmeyer]

How are unconnected pins to be handled? Should both the input and output buffers be disabled, or should they be set as inputs? I didn't see it mentioned in the datasheet

[PetrS]

Hi Allison,

yes, for unused digital pins, it is recommended that software disable both the input buffers and the output buffers of the pads in the Pad Control Register for the pins. In addition, the weak pull-down device should be enabled. This keeps the pad in a safe state under all conditions.

For analog pins, it is recommended that they be pulled down to VSSA (the analog return path to the MCU).

BR, Petr

[allisonmeyer]

Thanks Petr. Just to confirm, this is for completely unused pins. Would this be the same for test points, setting all to GPIO function as well as disabling both buffers?