Presentation on theme: "L. Greiner1HFT Hardware 09/23/2010 STAR Vertex-6 based PXL RDO board Design concept and items for discussion."— Presentation transcript:
L. Greiner1HFT Hardware 09/23/2010 STAR Vertex-6 based PXL RDO board Design concept and items for discussion
L. Greiner2HFT Hardware 09/23/2010 STAR Outline Current Xilinx Virtex-5 Design Proposed new Virtex-6 based design concept Outstanding questions and areas where clarification is needed.
L. Greiner3HFT Hardware 09/23/2010 STAR Current V-5 Design Ladder 1 SIU ADC SRAM USB TCD Ladder 2 Ladder 3 Ladder 4 V-5 Dev board V-5 Dev board Misc i/o Misc i/o Monolithic MB design. All components are designed onto MB. Design concept – do not load all functions onto production MBs.
L. Greiner4HFT Hardware 09/23/2010 STAR Proposed V-6 based Design Ladder 1 SIU ADC SRAM USB TCD Ladder 2 Ladder 3 Ladder 4 Misc i/o Misc i/o Basic PXL RDO functionality with add-on cards for testing and i/o. The V-6 MB contains all functionality for production PXL RDO. Expansion card contains all other needed testing and non-baseline RDO functionality. 240T V-6 240T V-6 Advanced Header Interface Advanced Header Interface V-6 MB USB SIU Expansion card (shown with possible functionality) Advanced Header Interface Advanced Header Interface
L. Greiner5HFT Hardware 09/23/2010 STAR Comments and questions The current data-rate bottleneck in the RDO system is the SIU. (we currently do meet the STAR requirements by a factor of >2 at 1kHz data rate) This gives us an option to add another SIU if needed. This allows us to make the production RDO board as simple as possible but to preserve the needed functionality for testing. There will be only minimal firmware modification needed (pin assignments which are needed for V-6 anyway. Can we run the ADC (320 MHz interface) on a daughter-card? - yes Do we want/need remote configuration? – yes via JTAG We can use a linux friendly USB interface on the expansion card.
L. Greiner6HFT Hardware 09/23/2010 STAR Proposal for the Physical Layout of PXL RDO motherboard L. Greiner 04/10/2011
L. Greiner7HFT Hardware 09/23/2010 STAR Total panel IO connector space for production board 4 x VHDCI 2 layer to maintain possible use with Phase-1, (http://www.molex.com/pdm_docs/sd/743370011_sd.pdf) We use 100 of the 136 pins arranged so that Ultimate sensor fits on a single cable. – 42.7mm x 12.77mmhttp://www.molex.com/pdm_docs/sd/743370011_sd.pdf 1 x SIU ~38mm 1 x JTAG (daisy chain) ~22mm 1 x TCD input (multi-drop) ~50mm 1 x USB ~45mm 1 x expansion card (room for USB + SIU + ADC inputs + misc i/o outputs on 3 x RJ-45) ~158mm Total panel space needed (can be front and back of boards) ~326mm + expansion board space
L. Greiner8HFT Hardware 09/23/2010 STAR VHDCI connector (SCSI-5) 80MHz DDR (160 MHz effective data rate) Very robust connector and cable mating system
L. Greiner9HFT Hardware 09/23/2010 STAR Proposal to use VME mechanical standard VME crates exist and are a STAR standard. The components that we need can fit into a 9U VME form factor board (h)366.7mm x (d)340mm. Our system consists of 10 RDO boards. Using double wide boards, this fits nicely into a 21 slot VME crate. A P1 or P2 backplane can be used to distribute power and ground (our system uses +5V only). Which backplane we use depends on other factors such as if we wish to use any of the bussed signals on P1 (backplane specs here http://www.elma.com/Admin/ProductionFiles1//ProductT ypeFile/24/English/VME_Reference_Sheet.pdf) http://www.elma.com/Admin/ProductionFiles1//ProductT ypeFile/24/English/VME_Reference_Sheet.pdf
L. Greiner10HFT Hardware 09/23/2010 STAR Some mechanical design adaptations Our RDO PCBs are likely to be ~0.100” thick since they will be ~20 layer. The VME crate has card slots for standard 0.062” PCBs. We can make a smaller PCB with mounting holes to allow the top and bottom of the PCB to be 0.062” and fit into the card slots (h)366.7mm x (d)340mm. VME card guide
L. Greiner11HFT Hardware 09/23/2010 STAR Proposed RDO Board layout Expansion board USB JTAG TCD SIU VME P1 VHDCI
L. Greiner12HFT Hardware 09/23/2010 STAR Can we use the P1 for TCD distribution? We have a bussed backplane, why not use it for TCD distribution? We can make a 6U card and do PECL to TTL conversion as well as the BUSY “OR” and install it in the 21 st slot. VME Slot 1 VME backplane RDO Boards BUSY CLK, TRG word, etc. Disadvantages – somewhat harder to test and troubleshoot. Advantage – less connectors on front panel, true bus distribution.
L. Greiner13HFT Hardware 09/23/2010 STAR Proposed 6U + 10 x 9U board RDO layout Expansion board USB JTAG TCD 6U VME Board SIU VME P1 TCD x10
L. Greiner14HFT Hardware 09/23/2010 STAR Testing and conclusions We will do BER testing for VHDCI + commercial VHDCI cables as a function of length and frequency. A test plan can be found at http://rnc.lbl.gov/hft/hardware/docs/LVDS/VHDCI _and_cable_testing.docx http://rnc.lbl.gov/hft/hardware/docs/LVDS/VHDCI _and_cable_testing.docx We will test the TCD signal transmission over VME P1 backplane (this is already working for the existing STAR TCD system) This is the current PXL RDO motherboard design implementation of choice.