[philso]

As I have stated previously, this should not be your first design project.

A microprocessor board like what you are contemplating will require 4-6 layers. I have seen examples of such boards done in 2 layers with much less demanding processors than what you are using and they ended in grief. They were ultimately redone in 4 layers.

There are parts of the circuit where it is very unwise to use an autorouter. The real art in PCB layout is in where you place all the components, relative to each other, based on their function. Only then can you get effective and efficient trace routings. CAD programs are only tools for running traces. You still need to know why a trace should be routed in a particular way before running the trace.

Have you priced all the other components that you will need? The bare board will cost you somewhere around $50 from a reputable prototype manufacturer. I am skeptical that you can make a useable board that will take the QFP packages yourself due to the fine pitch of the pins.

Engineering is solving problems by making wise choices. If you want vision processing, you will have to pay a price, one way or another. It may mean paying some money and/or calculating your current consumption and making adjustments in your overall robot design.