A15 PIN SERVO MOTOR

How can I drive servo motor (SG90) from spesifically A15 pin. Is there a code to drive it?

Well, the Arduino UNO doesn't have an A15 so it might be best if you mentioned which Arduino you are talking about.

If it's the MEGA 2450 then servo.attach(A15); should work fine. What makes you think it doesn't?