Would you please additionally confirm the existing post below?
SC16IS752 - what to do with unused pins - NXP Community
I would like to clarify the settings for unused GPIO0~GPIO7.
The previous post states output pin: floating, input pin: external pull-up or pull-down.
-Is this the same when used not only as GPIO0~GPIO7 but also as /DSRx, /DTRx, /CDx, and /RIx?
-About input pin, which is recommended, pull-up or pull-down?
Is there a recommended resistance value?
Hi Rong
Sorry for my reply delay,
My question was cleared.
I appreciate that your answer.
Best regards,
Bata
Hi,
I suppose you are right.
For the unused pins, if the pin is an output pin, just have it float. If the unused pin is an input pin, connect it to a pull-up or pull-down resistor, the pull up/down resistor can be 10K ohm. Either pull-up or pull-down is okay, there is not different.
Hope it can help you
BR
XiangJun Rong