Are you trying to ask how would 1 satoshi be split?? It won't and doesn't need to be. It will have it's own usd value. Remember fiat has only 2 decimals and bitcoin has 8. We never have an issue trying to sahre 1 cent. It is because it is so meaningless it doesn't matter. I don't even bother taking cents as change in the shops xP

I doubt there will ever be as many users or value for 1 satoshi to ever need to be split.