Difference: DTCDesign (3 vs. 4)

Revision 426 Oct 2009 - EricHazen

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META TOPICPARENT name="CmsSlhc"
We are designing a microTCA module called the DTC (DAQ and Timing Card) for the HCAL SLHC readout. It is currently envisioned that this will occupy one of the MCH slots in a dual-star type crate.
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=Design Thoughts=
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Design Thoughts

  Clocking – per AMC spec:
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  It is challenging to understand the AMC and µTCA clocking. My current understanding is that dual-star backplanes typically fanout one clock from each MCH to each AMC, and return one clock from each AMC to either MCH. This implies to me that we should use the single clock as a fixed-frequency link clock and that the LHC clock should be embedded in the stream sent on fabric port 1 from the MCH to the AMCs.
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Parts

 -- EricHazen - 03 Oct 2009
 
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