Minutes of the weekly Otis and Beetle meeeting, 31.01.2002 >>14:00<< ASIC lab meeting room. Participants: Harald Deppe, Sven Loechner, Michael Schmelling, Daniel Baumeister, Ulrich Trunk, Uwe Stange OTIS: ===== 1. Status of the Otis control logic tes (U.S.) Simulation of pipeline control resulted in a minor redesign of the latency circuit. Readout control circuit is currently under simulation with special emphasis on debugging and timing. A Code review will be held for these parts on Fr. 08.02.02, 10:00 in the ASIC lab. A timing diagram of the control circuit schould also be presented at that time. Debugging features included on Otis 1.0: W0 & R0 pipeline write and read pointers WD0 & WR0 derandomizer write and read pointers STB & STS self-test busy & self-test status DbufEmpty & DbufFull monitors ROstart & ROstop monitors These signals will be assigned to a pair of pads via an I2C programmable MUX. Timing monitors for the memory control will be included on Otis 1.0 2. Status of DLL, decoder and layout (H.D.) First channel complete, 3 next under construction. Timer block (to achieve a 5ns setup time) is ready. 3. Summary of the OTR-Meeting (U.T.) Mainli mechanical issues were discussed, esp. contacting the straw tubes. It was agreed that the proposed reset schema as well as the readout modes are usefull and should be implemented. It schould also be presented to the collaboration during an LHCb week. A watchdog driven DLL reset was proposed. Reset of Otis 1.0 Specification Registers POR POR DLL Reset I2C, Watchdog BX-Counter Reset I2C, Reset1, Reset2 Trigger Counter Reset I2C, Reset1, Reset2 State Machines (Pipeline & Readout) Reset I2C, Reset1 4. Test of the derandomizer buffer (H.D & U.S) There are now two test boards available, but due to their poor quality (open circuits due to bad soldiering) no progress has been made up to now. Beetle: ======= 1. Beetle 1.1 measurements (D.B) Daniel is still investigating the pipeline (collumn) and channel2channel variations of pedestals and gains. There is no evidence for their origin. He hopes to present some results at the FE-workshop on 07.02.2002. 2. Beetle FE 1.1 measurements (S.L) Set 2E: Gain: 38..55mV/MIP ENC 869e+40,2e/pF Problems with BG-setup @ NIKHEF have been solved. Sven will send around a parameter list for the FE chips soon. He will also present more ENC measurements at the FE-workshop. Ulrich Trunk -- ---------------------------------------------------------------------- AAAAAAAH HH Dr. Ulrich Trunk AA AH HH Physikalisches Institut der Universitaet Heidelberg AA LL AH HH ASIC Labor Heidelberg AA LL AH HH Tel: +49 6221 544324 Schroederstrasse 90 AA LL AH HH Fax: +49 6221 544345 D-69120 Heidelberg LL mailto:[log in to unmask] AA LLLLLLLL http://wwwasic.kip.uni-heidelberg.de/~trunk/ ----------------------------------------------------------------------