Developers have the API necessary to take their app from SnapView to Fill or FullView. This is usually a less-advertised API because it could easily be abused. To that end, the reverse is not available. There is no API to move to SnapView.
I might also caution you, that unless you are sure of the device resolution, starting in SnapView (which is not possible as it is) would be a dangerously unreliable step as many (most?) displays do not support it (too small). And since you are talking embedded, I imagine this might be exaggeratedly so. Since it sounds like you might know the hardware, you can take that as a general rule, not for your circumstance.