He wraps the football with both arms just before getting hit and going down. However he knew he was going down, he knew he was going down. Did he decide to? Did he know he was going down, see the clock, and decide not to fight it so that there would be time to clock the ball?

Honestly - I'm not sure what you're asking or why it matters. He knew he was going down. He secured the ball. BYU had enough time to run the clock play and the kick play. The rest is history.