[BillyMac]

Originally Posted by deecee

Are timeouts granted when they are requested or when the whistle is blown?

To answer deecee's specific question, I believe that the timeout is granted when the official "signals" (whistle and open hand) the timeout.

In a more general sense, the clock stopping, and the ball becoming dead, may not be at the same exact time in many circumstances, and may not be at the same time as the whistle.

5-8: Time-out occurs and the clock, if running, shall be stopped when an
official:
ART. 1 Signals:
a. A foul.
d. A time-out.
ART. 3 Grants and signals a player’s/head coach’s oral or visual
request for a time-out …

6-7: The ball becomes dead, or remains dead, when:
ART. 4 A player-control or team-control foul occurs.
ART. 5 An official’s whistle is blown (see exceptions a and b below).
ART. 7 A foul, other than player-control or team-control, occurs (see
exceptions a, b and c below).
EXCEPTION: The ball does not become dead until the try or tap ends, or
until the airborne shooter returns to the floor, when:
c. Article 7 occurs by any opponent of a player who has started a try
or tap for goal (is in the act of shooting) before the foul occurred,
provided time did not expire before the ball was in flight. The trying
motion must be continuous and begins after the ball comes to rest in
the player’s hand(s) on a try or touches the hand(s) on a tap, and is
completed when the ball is clearly in flight. The trying motion may
include arm, foot or body movements used by the player when
throwing the ball at his/her basket.

NFHS Basketball Rules Fundamentals
16. The official’s whistle seldom causes the ball to become dead (it is already dead).