Functional Description
Page 48
3.14
CompactPCI Serial
3.14.1
Backplane Filling Order
The CompactPCI Serial standard supports a maximum of 2 PCI Express x8 links (fat pipe),
6 PCI Express x4, 8 SATA, 8 USB and 8 Ethernet interfaces.
Refer to the CompactPCI Serial standard PICMG CPCI-S.0 for detailed
information regarding the rear I/O connectors.
CompactPCI Serial Specification PICMG CPCI-S.0 Revision 2.0:
2015; PCI Industrial Computers Manufacturers Group (PICMG)
Introduction to CompactPCI Serial on Wikipedia: