Data Communication Topology
Within the TitanMIMO-4, the Perseus 6111 AMC FPGA cards, which interface with the Radio420M modules on one side, and the Rear Transition Modules on the other, are organized in subgroups. Each subgroup consists of 3 to 4 Perseus 6111, while each MTCA.4 chassis contains up to 3 subgroups.
Every Perseus 6111 is connected to a subgroup master Perseus 6111, and each subgroup master is connected to the system master (the Perseus 6113 for the case of the TitanMIMO-4S, and the Kermode-XV6 for the TitanMIMO-4D) as in the diagram below. All connections are made using miniSAS connectors behind the system using a Rear Transition Module (RTM), and can be easily connected in a different configuration at any time via manual cable connections. Each link provides data rates of 16 Gbps using the Xilinx Aurora high speed serial interface over the multi-gigabit transceivers within the Virtex-6 FPGA.
Each RTM of the system has 7 miniSAS enabled connectors. All of the Perseus 6111 within the subgroup, with the exception of the subgroup master Perseus 6111, have 6 available miniSAS connectors that allow for connection to the other members of the subgroup in a mesh architecture. This allows upstream/downstream distributed processing to be done within the subgroup.