Wednesday, 25 October 2017

microcontroller - Unused MCU pins, better to tie to GND or use software to prevent floating?




Possible Duplicate:
General “rule of thumb” for unused IC pins



I read thru couple of questions & answers in here regarding the proper usage of unused MCU pins and all of them discussed about setting them either inputs with internall pull up/down or as output from the embedded software.



However, nobody mentioned the obvious: wiring the unused pin to GND or VCC. Is there any reason why one should not do that and use the software methods instead?




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