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The CMS Silicon Tracker FED Crates. Costas Foudas Imperial College. What goes in the FED Crates ?. What do we do about the VME controller ?. What about the TTC fast signals ?. FMM ?. The Choice of VME Controller.

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The cms silicon tracker fed crates
The CMS Silicon Tracker FED Crates

Costas Foudas

Imperial College

What goes in the FED Crates ?

What do we do about the VME controller ?

What about the TTC fast signals ?

FMM ?


The choice of vme controller
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)


The struck pci to vme64x bridge
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.


The pci module
The PCI module

  • Standard PCI mother board

  • Optical driver/receiver card


Specification
Specification

Uses a Sequencer to avoid overhead between VME transfers

Supports 2 edge VME Block transfer

(160 Mbytes/sec in theory )

Long Optical connection. Also an 20 Km option.


6u 180 vs 9u 400 mm
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


The fed racks i
The FED Racks I

PC

9U FED VME CRATE

9U

VME

Up to 17 FEDs

9U

VME

The VME

Controller

9U

VME


The rack design
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)


Vme control
VME Control

PC

 PC + 3 VME  cPCI Adapters

VME Controller


Daq connection
DAQ Connection

Run control

Rack 14

Rack 1

PC

PC

. . . . . . . .

14 Racks

VME

VME

VME

VME

VME

VME


Fed fast signals to tts
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,Out_of_Synch, Error


The fed racks ii
The FED Racks II

PC

9U FED VME CRATE

9U

VME

Up to 17 FEDs

9U

VME

The TTC dummy Card: It receives the TTC signals from P0 and send them to an FMM on their way to APVE.

The VME

Controller

9U

VME


Summary
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.


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