Minimum time elapsed?

[letemplay]

Originally Posted by Tio

The coach still needs to request the timeout when his team is in possession of the ball...and then the clock stops on your whistle. It is entirely possible that more than 0.3 seconds come off during this sequence. Don't over referee the clock... when you blow your whistle, look at the clock and as long as it isn't running after your whistle blows, you are fine.

Of course it's "entirely possible" more than .3 comes off...generally does...that was why my thread was entitled "Minimum"??
Let's say there's an even second (1.0) left with length of the floor to go and they pass it up to frontcourt and call an immediate TO. Clock starts, but before it can get stopped the horn goes off. Should there be time put back on and if so, how much? We (refs) don't have a count in tenths of a second so I'm guessing team is just sol. If we had a rule or standard that would say it's not possible to gain possesion and call a TO in less than say for example, 0.5..then in situations like this we could simply by rule deduct .5 from the previous time showing and play on. That was essentially my point of the post, to ask if anywhere uses a certain standard measure of time, like .5 or .7 in situations like that.