The CMS DT Muon DDU: a PMC based inte r face between frontend and data-acquisition

1. The CMS DT Muon DDU:a PMC based interface between frontend and data-acquisition F.Benotto, F.Bertolino, R.Cirio, G.Dellacasa INFN Torino - Italy

2. The CMS muon drift tubes • CMS barrel muon measurement: • Drift Tubes (DT) for trigger&measurement • RPC for trigger • Drift Tubes: • 4 layers of chambers (48 points/m) • 240 drift chambers (2.5 * 2-4)m2 • ~200.000 independent channels • 200 mm space resolution F.Benotto et al. LEB 2000 workshop

3. CMS 3D view F.Benotto et al. LEB 2000 workshop

4. The DT data flow • CMS is divided in 60 sectors: • 12 in f • 5 in R • on average: 1m/sector/event • each hit produces 3 bytes words • 144 bytes/m F.Benotto et al. LEB 2000 workshop

5. CMS transverse view F.Benotto et al. LEB 2000 workshop

6. Data acquisition and DDU • Frontend electronics on chamber • TDC data are grouped and sent via optolinks • Detector Dependent Unit (DDU) receives data • Readout Unit first level of CMS TriDAS (i.e. non-custom) F.Benotto et al. LEB 2000 workshop

7. DDU CMS TriDAS layout F.Benotto et al. LEB 2000 workshop

8. DDU CMS TriDAS layout (cont’d) F.Benotto et al. LEB 2000 workshop

9. The DT DDU functionalities • Get data from frontend • Check data (format,errors,alignement,...) • Monitor frontend FIFO status • Format data (8b  32b) for DAS • Take action in case of warnings/errors • Allow test/spy F.Benotto et al. LEB 2000 workshop

10. HFBR 5208 Led Transceiver HOTLINK Cypress CY7C933 INPUT FIFO 2k* 9b IDT 72231 Out BUS 2 XILINX XCS40XL OUTPUT FIFO 128k* 36b IDT 72V36110 PCI BRIDGE PLX 9080 HFBR 5208 Led Transceiver HOTLINK Cypress CY7C933 INPUT FIFO 2k* 9b IDT 72231 The DT DDU block diagram F.Benotto et al. LEB 2000 workshop

11. Lab test setup • To allow test/debug of the DDUs, the lab test setup used features: • DDU board(s) • PTT (simulates frontend data) • VME CPU • VxWorks and Tornado F.Benotto et al. LEB 2000 workshop

12. 2000 lab test setup MVME PMC span PMC span DDU PTT PTT DDU PTT PTT F.Benotto et al. LEB 2000 workshop

13. PMC simulator of DT data • PMC form factor • PLX 9050 PCI bridge • 1 FIFO (2k*9-bit) • Cypress Hotlink 7B923JC serial out • Fully testable via PCI • 6 boards built and tested F.Benotto et al. LEB 2000 workshop

14. The VME DT DDU prototype • 6U VME form factor • Cypress Hotlink CY7B933 serial link • 2k*9-bit input FIFO • Xilinx XC4005E • 2 256*18-bit output FIFOs • VME interface • built and tested with frontend protos F.Benotto et al. LEB 2000 workshop

15. The PMC DT DDU prototype • 2 independent input channels featuring: • 2* HP optolink HFBR 5208 • 2* Cypress Hotlink 7B933SC serial link • 2* (2k*9b) input FIFO • Xilinx XCS40XL FPGA • 128k * 36b output FIFO • PLX 9080 PCI bridge • PCB in production F.Benotto et al. LEB 2000 workshop

16. The DT DDU crate • DAS allows 2kBytes/event out of each DDU • DT produce ~166 Bytes/sector/event • Up to 12 sectors can be grouped • The DDU crate must allow: • standard DAS (send data to RUI,...) • spying during standard DAS running • reading out DT when DAS unavailable F.Benotto et al. LEB 2000 workshop

17. DDU #1 DDU #3 DDU #4 DDU #5 DDU #2 Layout of the DT DDU crate DT frontend VME CPU ethernet DAS F.Benotto et al. LEB 2000 workshop

18. Conclusions • Interfacing CMS DT with DAS will be done with DDU • 2 prototypes (VME and PMC) built • 1 PMC for frontend simulation built • 2000: debug PMC DDU • 2000/1: design and build proto with final architecture F.Benotto et al. LEB 2000 workshop