difference between IO PAD and Core Pad

xialishui1987

刚才想知道IO PAD和Core PAD的区别，百度没出来，谷歌出来的东西，讲的很清楚。  


Difference in layout between a core and i/o power pad

Hi
Can Anyone tell me the difference between a core and i/o power pad in a digital design with respect to their layouts??

I have a umc library which claims to have separate core (VCCK)and i/o (VCCIO) power pads. But the respective layouts look similar. I know that the core and i//o pads serve different purposes.

Thank you


Difference in layout between a core and i/o power pad

the core pad is only here to provide power to the core, so must be connected to the std-power ring instead the i/o power pad, that provide the power for the pad power ring.



Re: Difference in layout between a core and i/o power pad

Thank u ... but as said earlier I know there lies a difference in the purpose of using core and I/O pads. All I want to know is the differnce in the internal structure(layout) of the respective pads. Can anyone throw some light on this?



Re: Difference in layout between a core and i/o power pad

I dont knw abt the UMC , but for TSMC . wen you load both kind IO's into encounter. you can definitely see difference in the lef definition, Normally for a Core Io , pins are defined and wen you enable instance pin option in encounter you can see the metal pins on these core pads but not on IO pads.

Br

Sing


Re: Difference in layout between a core and i/o power pad

Is that the only difference? Isn't there any difference in the internal structure of these pads, because they serve different purpose?