Kontron AT8901 - Manual (Page 39)

AT8901 Hardware Description
Page 3 - 8 AT8901 User Guide
ShMC Cross-connection
The Hub Board provides two dedicated 10/100BASE-T connections to the shelf managers ac-
cording to PICMG 3.0 rev. 2 (redundancy shelf manager cross-connection). Port 0/20 is con-
nected to SMCA, 0/24 to SMCB.
AMC GbE Support Channels
Each AMC bay has one GbE connection to the base interface switch (AMC Channel 0). On
Channel 1, AMC bay B1 has an additional link to the backplane update channel buffered by a
cross-point switch. The update channel connects to the base switch of the redundant Hub
Board.
In applications with a PrAMC used as a system controller in the ATCA Hub Board, the system
controller redundancy ensures that a fault in a base switch of one Hub Board does not cut the
connection to the redundant Hub Board (see block diagram below). The connections between
AMC B1 and the backplane are buffered by a cross-point switch that is controlled by the IPMC.
Figure 3-2: Block Diagram AMC GbE Cross-connect via update channels
The block diagram shows one solution for the AMC GbE support channels with a PrAMC as
System Controller.