NFS Clarification - Injury Timeout

when a player on the opposing team is down (injured) and the game is stopped on the field Coach D calls his team over to his sideline (they remain on the field, Coach D obviously remains off).
Referee comes and stands between coach D and his team in the "Official Fight Prevention Stance", telling him it is not a timeout and he cannot talk to his team.
Coach D points out that there is no where in the rules that says you can' t do that so long as the players stay on the field.
Who is correct?
Referee comes and stands between coach D and his team in the "Official Fight Prevention Stance", telling him it is not a timeout and he cannot talk to his team.
Coach D points out that there is no where in the rules that says you can' t do that so long as the players stay on the field.
Who is correct?