1. Costas Foudas, The Tracker Interface to TCS, 24.02.02 The CMS Silicon Tracker FED Crates What goes in the FED Crates ? What do we do about the VME controller ? Costas Foudas Imperial College What about the TTC fast signals ? FMM ?

2. Costas Foudas, The Tracker Interface to TCS, 24.02.02 The Choice of VME Controller The FED will support VME64x (eventually) : Therefore we need to gain experience with the VEM64x protocol in the near future. Why ?: VME64x can reach up to 160 MBytes/sec theoretical block transfer (BLT) rate. Most liekly less than that but still faster than the old VME. 4 types of PCI-to-VME cards exist: Wiener (indeed), National Instruments, SBS, Struck. To my knowledge only the Struck one supports VME64x and can do 80 MBytes/sec real rate (I measured it in their lab at Hamburg). They claim to be firmware upgradeable to 100 Mbytes/sec. Keep in mind that in order to evaluate this card you need also a VME64x slave (FED or something else)

3. Costas Foudas, The Tracker Interface to TCS, 24.02.02 The Struck PCI-to-VME64x Bridge It consists of 2 modules connected via optical link (Fiber):  The VME side is 6U 160 mm.  The PCI side consists of a mother board and the optical card. Installation  Just like the SBS  Linux public drivers available.

4. Costas Foudas, The Tracker Interface to TCS, 24.02.02 The PCI module Standard PCI mother board Optical driver/receiver card

5. Costas Foudas, The Tracker Interface to TCS, 24.02.02 Specification Uses a Sequencer to avoid overhead between VME transfers Long Optical connection. Also an 20 Km option. Supports 2 edge VME Block transfer (160 Mbytes/sec in theory )

6. Costas Foudas, The Tracker Interface to TCS, 24.02.02 6U 180 vs 9U 400 mm Why do it like this ? The VME master connects directly to the VME bus. The front panel is 9U VME and the Crate can close

7. Costas Foudas, The Tracker Interface to TCS, 24.02.02 The FED Racks I 9U VME 9U VME 9U VME PC 9U FED VME CRATE Up to 17 FEDs  The VME Controller

8. Costas Foudas, The Tracker Interface to TCS, 24.02.02 The Rack Design Need to get one of these and start asking questions: Where does all fit ? Is there enough cooling where we need it ? How do we route all the cables (optical or copper)

9. Costas Foudas, The Tracker Interface to TCS, 24.02.02 VME Control PC  PC + 3 VME  cPCI Adapters VME Controller

10. Costas Foudas, The Tracker Interface to TCS, 24.02.02 DAQ Connection Run control.... 14 Racks PC VME Rack 14 PC VME Rack 1

11. Costas Foudas, The Tracker Interface to TCS, 24.02.02 FED Fast Signals to TTS The FED outputs the 4 TTS signals on the P0 connector in LVDS. The different FED signals can by daisy chained to produce a crate summary or can be send individually to so FMM board. The merged fast signals are driven to the APVE input and are combined with those generated by the APVE. P0 LVDS Signals: Ready,Busy,Warn_OVF,O ut_of_Synch, Error

12. Costas Foudas, The Tracker Interface to TCS, 24.02.02 The FED Racks II 9U VME 9U VME 9U VME PC 9U FED VME CRATE Up to 17 FEDs   The VME Controller The TTC dummy Card: It receives the TTC signals from P0 and send them to an FMM on their way to APVE.

13. Costas Foudas, The Tracker Interface to TCS, 24.02.02 Summary Get a Struck module and evaluate it but it will not be of use till there is a VME64x slave. Need a design for getting the TTC signals from the P0 to the FMM. Need to start some system design of our rack, the crate and the signals.