Electronic – Can we ground all the nets in a printed circuit board

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I am a newbie in electronics and I am designing a printed circuit board.

The IC I am using has some pins that I don't use in my circuit. Is it okay to ground those nets or leave them as they are?

I am asking this because I have heard that sometimes these nets can act as floating pins and could cause noise and errors. I am not sure whether this is true or not so please clarify my doubt and suggest me the right way.

Best Answer

If you check the HW Design Manual then you'll see that it suggests the unused pins should be left floating. Please refer to Table 4 on p.15 and p.16.