10
aTCA-81514PA
2 ATCA Backplane
The 14
‐
slot ATCA monolithic Backplane provides:
40 Gb/s connectivity (4 lanes with 10 Gb/s)
12 ATCA Node slots
ATCA Hub slots
Two dedicated Shelf Manager slots
PEM Slots
Fan Tray slot
SEEPROMs
2.1 Interfaces
2.1.1
Base Interface
Logical slots 1 and 2 are the hub slots for the Dual Star Base Interface.
Base Interface Channel 1 (ShMC) of logical slot 1 and 2 is cross connected to both
dedicated Shelf Manager slots on the ATCA Backplane.
2.1.2
Fabric Interface
The Fabric Interface is wired as Dual Star, supporting four ports (8 pairs) per
channel. See PICMG® 3.0 AdvancedTCA® Base Specification for details.
2.1.3
Synchronization Clock Interface
Six differential pairs of synchronization clocks are bused between all 14 ATCA slots
and terminated at both ends with 80.6 Ohms between each differential pair.
2.1.4
Power Interface
Power distribution within the ATCA Backplane is divided into 4 Power Branches. This
topology is used for safety reasons to keep the max. current per branch less than
50 A. Slots connected by update ports, are on separate power branches as well as
both hub slots, the Shelf Manager slots and the Fan Trays.
