Question, i.MX28 unused pins

[Aemj]

Dear team,

I would like to ask about the handling of unused pins of i.MX28.

My customer is thinking about the use of i.MX28 without 32K Clock input into i.MX28.

In the case of not using 32K clock input to i.MX28, how should RTC_XTALO/RTC_XTALI pins be treated on the board?

(1)

Can RTC_XTALO/RTC_XTALI pins be left open?

(2)

In the following thread of i.MX community, I received the answer that unused pins (including HSADC and LRADC) if i.MX28 can be left unconnected.

https://community.nxp.com/message/538299

Could you let me know about the exact reason that those unused pins can be left open?

Thanks,

Miyamoto

[igorpadykov]

Hi Miyamoto

1. yes

2. in general analog inputs are left unconnected, if not used.

Please note that all publicly info related to design are provided on Hardware

Design Checklist for i.MX28

Hardware Design Checklist for i.MX28 

If you wish some special or additional knowledge about internal blocks please

elevate request through local fae channel.

Best regards
igor
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