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Published byCody Forbes Modified over 10 years ago
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XFEL 2D Pixel Clock and Control System Train Builder Meeting, UCL 11 May 2010 Erdem Motuk, Martin Postranecky, Matt Warren, Matthew Wing,
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2 11 May 2010C+C DS90LV001 4k7 100R 2k2 100R 4k7 LVDS output +ve LVDS TEST OUTPUT -ve LVDS TEST OUTPUT DS90LV110 100pF 2 7 U44 3 6 8 12 U11 7 11 SK16 SK26 SK15 SK25 8 12 U35 7 11 CLK IN A-C Coupling & Latching Test Circuit -1-
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3 11 May 2010C+C 100 MHz clock 1= IN+ 2= IN- 3= OUT+ latched 4= OUT- latched
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4 11 May 2010C+C Paused Signal LONG PAUSE 3= OUT+ latched 4= OUT- latched
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5 11 May 2010C+C Starting Signal STARTINGS IGNAL 3= OUT+ latched 4= OUT- latched
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6 11 May 2010C+C Pseudo-Random Signal PSEUDO- RANDOM 1= TTL IN 2= OUT+ latched 3= OUT- latched
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7 11 May 2010C+C PSEUDO- RANDOM START 1= LVTTL IN 2= OUT+ latched 3= OUT- latched Pseudo-Random Signal - Start
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8 11 May 2010C+C DS90LV001 4k7 100R 2k2 100R 4k7 +ve LVDS TEST OUTPUT -ve LVDS TEST OUTPUT DS90LV001 100pF EN 2 8 7 U1 3 6 EN 2 8 7 U2 3 6 1k +3v3 Pin 5 1 100n A-C Coupling & Latching Test Circuit -2- RJ45 2121 DS90LV028 DS90LV001 3 2 U3 6 7 3 4 U4 6 5m CAT5 cable
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9 11 May 2010C+C National DS90LV001 800 Mbps LVDS Buffer800 Mbps LVDS Buffer Diff. Delay = 1.4ns typ.Diff. Delay = 1.4ns typ. Part-to-Part Skew = 0ps typ. / 60ps max. ( for same Vcc & temp. )Part-to-Part Skew = 0ps typ. / 60ps max. ( for same Vcc & temp. ) Fall / Rise Time = 310ps typ.Fall / Rise Time = 310ps typ. Peak-to-Peak Data Jitter = 100ps typ.Peak-to-Peak Data Jitter = 100ps typ.
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10 11 May 2010C+C Current Tests Differential LVDS Pseudo-random signal from FPGA Development Board ( using 100 MHz clock ) 5 m of CAT5-type cable with RJ45 A-C coupling & latching test circuit -2- FPGA Development Board Differential LVDS Test Output fed back to FPGA Development Board Compare and log errors
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11 11 May 2010C+C Future Plans Finish testing AC-coupling & Latching test circuit -2-Finish testing AC-coupling & Latching test circuit -2- Yes / No decision on balanced signals ( Manchester coding )Yes / No decision on balanced signals ( Manchester coding ) ~2 weeks Final FPGA selection ( PLL, Delays )Final FPGA selection ( PLL, Delays ) Finalise Circuit Design of C&C prototype boardFinalise Circuit Design of C&C prototype board ~ July 2010 Prototype board selection ( DESY ? / RAL ? )Prototype board selection ( DESY ? / RAL ? ) Schematic entry & layout ( RAL )Schematic entry & layout ( RAL ) ~ August - September 2010 C&C Prototype Mk.1 manufactureC&C Prototype Mk.1 manufacture ~ October 2010
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12 11 May 2010C+C Fanout 8 TCP/ IP Local AMC Control To FEE FPGA TR / Machine etc. Signals or inputs from C&C Master Outputs to Fanouts Single Integrated Prototype Card Master PLL etc
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13 11 May 2010C+C End…..
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14 11 May 2010C+C μ TCA Crate Timing Receiver Crate Processor 99.3058 MHz Clock Start/Info/Stop Bunch Veto FEE Status C+C Master FEE C+C Fanout FEE 4.5139 MHz Clk Trigger + Telegram ID Bunch Veto 4 FEE 4 C+C Fanout Slave XFEL Timing Interface Other 1-20MHz? Clock Trig/Data Overview MINIMUM FANOUT REQUIREMENTS : 16 + Fanouts, expandable 3x Outputs ( diff. LVDS, STP/UTP ) 1x Input ( single line, level only )
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