9
aTCA-80302PA/PD
3 ATCA Backplane
The 2-slot ATCA monolithic Backplane is completely passive and is not a field
replaceable unit. The backplane provides 40Gb/s connectivity (4 lanes with 10Gb/s)
and 2 ATCA slots in a:
•
Hub/Hub
configuration or
•
Node/Node
configuration
3.1 Logical to Physical Slot Mapping
The physical and logical slots are sequentially numbered from the lower to the upper slot.
Table 2: 2-Slot ATCA Backplane physical to logical slot mapping
Physical
Slot #
Logical
Slot
#
HW-Address
(Hex)
IPMB-Address (Hex) Update
Channel
2
2
42
84
1
1
41
82
3.2 Interfaces
3.2.1 Fabric Interface
All 15 Fabric Channels of slot 1 are routed to the respective Fabric Channels of slot 2.
3.2.2 Synchronization Clock Interface
6 pairs of synchronization clocks are bused between both ATCA slots and
terminated at both ends.
3.2.3 Update Channel Interface
The Update Channels are wired between both ATCA slots. The Update Channel
can be used to pass data or routing information between two redundant ATCA
Boards.
3.2.4 Intelligent Platform Management Interface
The Shelf uses an Intelligent Platform Management Bus (IPMB) for
management communications among all ATCA Boards. The reliability of the
IPMB is improved by the addition of a second IPMB, with the two IPMBs
referenced as IPMB-A and IPMB-B.
The IPMB-A and IPMB-B are routed between the ATCA slots.
