Guidelines for mounting on a board (RZ/G)

Are there any guidelines for mounting on a board? Also,
 is there a recommended number of board layers?

The following guidelines for a mounting guidelines For details,
please contact a Renesas sales office or representative.
Recommended numbers of board layers are as follows.
 -RZ/G1N, RZ/G1M: 8 layer build-up
 -RZ/G1E: 6 layer build-up and 6-layer through-hole