This is the preliminary board layout; it is not complete. The board dimensions are 2 in. x 3 in. with traces on only two sides. Components are also on top and bottom. The decision to use only two trace layers was driven by the desire to use the free version of Eagle CAD, which is a PSAS standard.
On the left top side of the board is the USB/Power connector. The Debug port will be placed on the left bottom side.
Both top and bottom of board shown with component placemets
Top side only of board
Bottom side only of board