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AWR2944: Are unused pins pulled down to ground

Allen35065
Expert 3985 points
Part Number: AWR2944

Hi Champs,

On AWR2944, we don't use some pins like OSC_CLKOUT, CSI2, LVDS and GPADC. Is it need to pull them to ground or leave them unconnected? 

Thank you.

Regards,

Allen 

  • +1
    TI__Genius 15810 points

    Hello,

    My opinion is that It is not necessary to pull unused pins to ground. Leaving them unconnected is perfectly fine. However, this comes with a few unwanted situations where there can be a possibility of noise or interference. If this is a concern, we can pull them to ground. This will help to ensure that the pins do not pick up any unwanted signals.

    Ultimately, the decision of whether or not to pull unused pins to ground is up to you. However, if you are concerned about the possibility of noise or interference, or if you need to meet regulatory requirements, then pulling them to ground is a good option.

    Hope this helps,

    E. Shareef

  • 0 in reply to E. Shareef
    Prodigy 10 points

    • How is the software configured for these pins? 

      Just turn off the pin function?

  • 0 in reply to user4693949
    TI__Genius 15810 points

    I have an update from a Colleague:

     There is no concern on noise coupling or interference. These can be left unconnected. 
    OSC_CLKOUT is bringing internal oscillator clock for the crystal trimming & debug purpose. There is internal test mux takes care of PU/PD.
    CSI2, LVDS : Driver takes care of tri-stating if not used.
    GPADC: Internally test mux connects right ADC input to GPADC input puts.