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A. Lai 30/31 Jan 2002 DIALOG CARIOCACARIOCA ?. A. Lai 30/31 Jan 2002 DIALOG DIALOG-  (Nov 2001) has 83 pins on a PGA100 package (~13x13 mm 2 ) DIALOG-

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Presentation on theme: "A. Lai 30/31 Jan 2002 DIALOG CARIOCACARIOCA ?. A. Lai 30/31 Jan 2002 DIALOG DIALOG-  (Nov 2001) has 83 pins on a PGA100 package (~13x13 mm 2 ) DIALOG-"— Presentation transcript:

1 A. Lai 30/31 Jan 2002 DIALOG CARIOCACARIOCA ?

2 A. Lai 30/31 Jan 2002 DIALOG DIALOG-  (Nov 2001) has 83 pins on a PGA100 package (~13x13 mm 2 ) DIALOG-  (April 2002) will have 75 (min) to 91 (max) pins  PGA100 or QFP100 (14x14 mm 2 ) The layout is strongly pad limited Connections to/from ASD:  16 LVDS in (32 pins)  2 Discriminator threshold lines  2 Test pulse (4 pins) tot 38 pins (reducible to 22 if non differential inputs are used) 16 LVDS input Prog. Delayer Prog. Dig. Shaper MASKMASK Logical Channel Generation 8 LVDS output I 2 C Interface SCL SDA DIALOG Configuration registers DLL Address 16 bits Rate counter CKext Tst Pls0 Pls1 ASD pulse generation DIALOG-  functional scheme

3 A. Lai 30/31 Jan 2002 DIALOG-CARIOCA Same board. How to assemble DIALOG and CARIOCA on F/E? - Mechanical integration is not trivial (an additional board will be needed ?!) Same technology  Integrate the two chips on the same die and put one single IC on front- end ? + (On top) (…Otherwise)

4 A. Lai 30/31 Jan 2002 Consequences (1) 1.New schematics and layout  technically feasible and relatively easy 2. Who is going to do it? Manpower… (Cagliari can) 3. Possible “interference/incompatibility” problems in integration?  DIALOG “uses” a 100 kHz clock (during data/configuration transfer). It behaves like a silent quasi-analog device.  The most dangerous (noisy) part are the current absorbing LVDS drivers  Accurate layout can well separate this part from the analogue one (see below)  Beside that, the “interaction” between the two parts is stronger at the board level (connections, mechanics, grounding…)

5 A. Lai 30/31 Jan 2002 Layout issues 250  m Std cells area: squeezable at least to 50% datapath Input signals Outputs (logical channels) controls

6 A. Lai 30/31 Jan  m 61  m 290  m 2000  m 250  m Sizes of full custom cells Calibration DLL Prog. Delay, Digital Shaper and 1 st stage of logics (1 channel) Prog. Delay, Digital Shaper and 1 st stage of logics (8 channels)

7 A. Lai 30/31 Jan 2002 DIALOG-CARIOCA Geometrical layout Digital PWR/GND pins Analogue PWR/GND pins Analogue I/O Digital I/O Analogue PWR lines Digital PWR lines Standard Cells area ASD Delay and Digital Shaper Calibration DLL DAC Signals from chamber Logical channels (LVDS out) Digital controls

8 A. Lai 30/31 Jan 2002 SignalTypeCommentsSignalTypeComments P[15:0] (32) LVDS in 16 Physical signals; from ASD’s L[7:0] (16)LVDS outLogical signals; to ODE Tin (2)LVDS inTest signal; from SBS[1:0] (4)LVDS outPulse signals; to ASD’s Tout (2)LVDS outTest signal to next DIALOGVth1V level outDiscriminator threshold 1 SCin (2)LVDS inI 2 C clock inVth 2V level outDiscriminator threshold 2 SCout (2)LVDS outI 2 C clock outGRinInGlobal Reset SDin (2)LVDS inI 2 C data inGRoutoutGR to next DIALOG SDout (2)LVDSoutI 2 C data outA[6:0]InDevice Address GND/PWRSupply6 couples DIALOG&CARIOCA pinout: 69 pins  80 pins LQFP (10x10 mm 2 ), 80 or 100 pins (if pins are added) DIALOG-  pinout (preliminary): 87 pins  100 pins LQFP, 14x14 mm 2 SignalTypeCommentsSignalTypeComments S[15:0]Analogue 16 analogue signals from chamber L[7:0] (16)LVDS outLogical signals; to ODE Tin (2)LVDS inTest signal; from SBGRinInGlobal Reset Tout (2)LVDS outTest signal to next DIALOGGRoutoutGR to next DIALOG SCin (2)LVDS inI 2 C clock inA[6:0]InDevice Address SCout (2)LVDS outI 2 C clock outGND/PWRSupply8 couples SDin (2)LVDS inI 2 C data in SDout (2)LVDSoutI 2 C data out

9 A. Lai 30/31 Jan 2002 From chamber FRONT-END BOARDS (my present envisaging) F/E boards inside chamber (not visible in reality) Chamber cageConnectors are accessible from outside DIALOGCARIOCA Logical channels out Controls out Controls inPWR/GND Logical channels out Controls out Controls inPWR/GND DIALOG – CARIOCA (separated) Interboard connections ?

10 A. Lai 30/31 Jan 2002 Consequences (2) 4. Additional time in the schedule. What is the present schedule?  Chamber production starts beginning of 2003  The electronics to be used in the tests of produced chambers will not be the definitive one. Only the ASD chips will be used. This disentangles the front-end production schedule from the chamber production one.  Proposal:  Produce and test accurately both the final version of CARIOCA and DIALOG within 2002 (see “full chain test”).  Prepare and submit the CARIOCA_DIALOG integrated version beginning of  Test, compare and approve/discard it within half 2003.

11 A. Lai 30/31 Jan 2002 Consequences (3) 5. Impact on the system: The front-end design is simplified… but: We have MANY font-ends: Positive Negative RPC? GEM? Moreover: also a standalone CARIOCA (and DIALOG) version is needed  How about RPC and GEM? Can they use the same chip as the MWPC? (This should be answered quickly…) Yes: 2 kinds of D-C chip are needed: DC+, DC-. No: 3 kinds: DC+, DC-, D/C standalone  Still worthwhile ? We think yes: The cost is invariant with the number of project per wafer. DIALOG and CARIOCA will be developed and tested separately in any case

12 A. Lai 30/31 Jan 2002 Consequences (4) Which name? SuperDIALOG ? CARIOCAgliari ? SuperD ? A committee, a competition and a prize to solve this fundamental problem…

13 A. Lai 30/31 Jan 2002 Conclusions The CARIOCA-DIALOG integration is appealing from the system point of view and technically feasible. The impact on the Muon Project schedule can be minimized Differences with the standalone solution: On board connections, mechanics, grounding are better; Interaction with the LVDS drivers can be kept under control; Final answer can be given only by tests; The different kind of front-ends in the system are not a serious problem (the system cost is unaffected, the additional work is acceptable)  A try is feasible and worthwhile The final decision could be postponed to the 1 st half of 2003, but the final versions of both CARIOCA and DIALOG should be realized with an eye to their integration (especially from the layout point of view).


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