11
aTCA-81514PA
2.1.5
Update Channel Interface
The Update Channels are wired between two redundant ATCA Backplane slots as
10 differential pairs.
The Update Channel is intended to pass information between two redundant ATCA
Boards.
Figure 3: Update Channels
2.2 Intelligent Platform Management Bus (IPMB)
The Shelf uses an Intelligent Platform Management Bus (IPMB) for management
communications among all ATCA Boards, the Fan Trays and the Shelf Managers. 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.
IPMB
‐
A and IPMB
‐
B are routed to the ATCA slots in a bussed configuration.
Figure 4: IPMB
