We do not offer "reference design" for our B4860 processor, but you can look schematic for our B4860-based development board - "B4860QDS".
QorIQ Qonverge Development System|NXP
Schematic file and board user guide is available with board, on USB stick with board documentation.
If you do not have this board and USB stick with board documentation, please create a Case to online technical support to request board schematic: