Hub-Module MiniPOD Connections ----------------------------------- Original Rev. 26-May-2015 Current Rev. 2-Dec-2016 The Hub Module includes 2 MiniPODs - 1 Transmitter MiniPOD and 1 Receiver MiniPOD. Details about the connections to a Hub Module MiniPOD are shown in drawing #21. Only 8 of the 12 channels in the Transmitter MiniPOD are connected to MGT transmitter outputs on the Hub's FPGA. MiniPOD fibers: 3, 5, 7, 9 are not connected to the FPGA. The 8 attached MiniPOD fibers are connected to MGT outpu ports in the following order: Transmitter MiniPOD Fiber MGT Quad and Port ------------- ----------------- 0 227 Tx2 1 227 Tx0 2 226 Tx2 4 226 Tx0 6 225 Tx2 8 225 Tx0 10 224 Tx2 11 224 Tx0 These Quads are GTH type MGT transceivers in SLR 0 of the FPGA. These connections are listed in the as built document, "hub_0_ab_fpga_mgt_transceiver_usage.txt" and are shown in Hub Circuit Diagram 23. Only 4 channels from the Receiver MiniPOD are connected to MGT receivers in the Hub;s FPGA. The connected Receiver MiniPOD fibers are shown in the following table: Receiver MiniPOD Fiber MGT Quad and Port ------------- ----------------- 2 224 Rx2 4 224 Rx1 6 224 Rx2 8 124 Rx0 Quad 224 is of the GTH type and Quad 124 is of the GTY type. Both of these Quads are in SLR 0 of the FPGA. These MiniPOD connections are capacitor coupled using 100 nFd 0201 size coupling capacitors. The trace routing from fiber 8 to Quad 124 Port Rx0 is particularly complicated and may not support high-speed operation. The 8 remaining Receiver MiniPOD fibers have no connection on the Hub's FPGA. Recall that one of these fibers is used to receiver the Optical Felix TTC clock and data signal. These connections are listed in the as built document, "hub_0_ab_fpga_mgt_transceiver_usage.txt" and are shown in Hub Circuit Diagrams 22 and 23. Monitoring and control of the two MiniPODs is provided by a separate "TWB" from the Hub's FPGA to each MiniPOD. Both MiniPODs have their TWB Address set at zero. Each MiniPOD has its own Interrupt_B and Reset_B lines connecting it to the Hub FPGA. Pull-up resistors are provided for the TWB SDA and SCL lines as well as for the interrupt and reset lines so the Hub FPGA does not need to provide the pull up current. Filtered 2.5 Volt and 3.3 Volt power is separately supplied to each MiniPOD from the bulk supplies on individual isolated power fills. The design of the heat sinks for these MiniPODs must take into consideration: the ATCA height limitation, the ROD mezzanine air flow requirements, and the near by Hub FPGA heat sink. The two ribbons of optical fibers for these MiniPODs will uses the backplane optical MPO connectors to exit the Hub via its Rear Transition Module. Part numbers for 50 cm single 12 fiber ribbon Prizm to MPO cables are: Molex 106267-2011 for the male MPO connector and Molex 106267-2001 for the female MPO connector Various versions of the MiniPODs are available. In any case we do not need to purchase the part with the Avago heat sink because we will just end up throwing it away. 10 Gbps 12.5 Gbps 14 Gbps ------------ ------------ ------------ Transmitter AFBR-811VxyZ AFBR-812VxyZ AFBR-814VxyZ Receiver AFBR-821VxyZ AFBR-822VxyZ AFBR-824VxyZ The parts used on the CMX were: AFBR-811FN1Z transmitter and AFBR-811FN1Z receiver where the FN1Z suffix means: Flat ribbon cable No heat sink 100 meter range Z that's all These are high speed short range parallel devices designed for multimode fiber systems at a nominal 850 nm wavelength. I assume that they can all talk to each other.