How to convert block diagram in to circuit schematics
Block diagram is a higher level abstraction of a design, it usually doesn't have all connections and internal structure of blocks. It is just for general illustration of design hierarchy or data flow. You can't convert block diagram into schematics, you need to DESIGN the schematics in ACCORD with block diagram and functional definitions of its blocks. The other way is possible, from schematics to block diagram, but not the opposite way.