I'm a bit confused now. To my mind the file attached to my last post does exactly what you show in your diagram. It makes the camera do a 180 degree fly-round the y axis, from  90 degrees to  -90 degrees. The pose only affects the yOrbit, otherwise you need to position the camera manually. In other words, if your figure is dead centre of world space, the xTran of the camera should be set to zero, and the yTran, zTran, and focal length, etc, set to achieve the desired visual framing.

Is the file I posted not working for you? Two things that you need to check are that your view is through the Main Camera, and that the Main Camera has its animating switch turned on. The animating switch is the key icon in the Camera Controls palette, it should be grey, not red.