PAD power compution issue???

[testt]

For power consumption issue in idle mode,
would you use a bidirection PAD and tri-state it or use a output PAD and keep output signal level don't change??
What's you choice ??

Thank you!!!

best regard,

testt

 

[bulx]

I would think, not using tri state would consume less power. Keep a pad hi or Lo would consume only static current.
- b

 

[sishir]

Tristate logic can cause power waste. adding a weak pullup or pull down to the net would remove the power waste

 

[eternal_nan]

Actually this depends on what the pad is hooked up to on the board. If it is hooked up to a pullup/pulldown or a parallely terminated transmission line driving a level (or an internal pullup/pulldown) might create a static path between VDD/GND which will pointlessly waste power. Tri-stated pads never waste power. Tri-state is the way to go.

 

[quan228228]

Could you tell us the detailed infor about PAD POWER consumation, or there is any article on this issue?