Difference: AMC13UserManual (7 vs. 8)

Revision 820 Oct 2014 - EricHazen

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Just starting on this!
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THIS MANUAL IS INCOMPLETE but what is written here should be more accurate and up to date than the old "functional specification". Please e-mail me if you find mistakes/omissions here (Eric H).
 
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See Also
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See Also
 
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DAQ Outputs

The AMC13 implements the S-Link Express protocol using a core provided by CMS CDAQ. This is currently a 5.0Gb/s link, received by the FedKit (see CMSFedkitManual) or by an AMC13v1 (Virtex-6 version only) running special firmware version 0xff.

The AMC13 has 3 SFP transceivers which may be used for DAQ. There are 3 possible configurations, determined by the value written to CONF.SFP.ENABLE_MASK. In addition, CONF.EVB.ENABLE_DAQLSC must be set to '1'. The AMC13Tool2 command daq may be used to accomplish this configuration.

Configuration Mask value Notes
SFP0 only 1 (top) DAQ fiber for AMC1-AMC12 readout
SFP0, 1 3 SFP0 for AMC1-AMC6, SFP1 for AMC7-AMC12
SFP0, 1, 2 7 SFP0 for AMC1-AMC4, SFP1 for AMC5-AMC8, SFP2 for AMC9-AMC12

After changing the DAQ output configuration the logic and high-speed transceivers must be reset by writing to ACTION.RESETS.DAQ (AMC13Tool2 command rd).

 

TTS

The TTS (Trigger Throttling System) output from the AMC13 is a four-bit code transmitted over

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  • 2 means enforce rules 1 and 2
  • 3 means enforce only rule 1
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External Clock / Trigger Inputs (g-2)

The following section applies only to the g-2 firmware series (Kintex 0x8000 and up). The AMC13 clock and external trigger can come from one of 3 sources (optical fiber, internal or external copper signal). The choices are enumerated in the following table.

Clock Source Trigger Source Hardware T2 0xd bit 30 T1 0x1 bit 8 T1 0x1 bit 2
Internal Internal Loop-back fiber (Note 1) 0 1 1
Fiber Internal Fiber with TTC input 0 0 1
Lemo Internal Special T3 with clock input 1 0 1
Lemo Lemo Special T3 with clock, trig inputs 1 0 0

Notes:

  1. SFP transceiver with loop-back fiber from Tx to Rx must be installed in bottom site
 -- EricHazen - 20 Aug 2014
 
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