Transcript atlas-rod-092009-v2

ROD R&D Status
K. Johns, C. Armijo, J. Steinberg (U. Arizona)
H. Chen, F. Lanni, J. Mead (BNL)
L. Hervas (CERN)
A. Meyer, A. Kielburg-Jeka, A. Straessner (Dresden)
G. Perrot (LAPP)
G. Blasetti, M. Citterio (INFN, Milano)
D. Schamberger (SUNY, Stony Brook)
Optical Link Notes
Currently we build with
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Reflex Photonics SNAP12
Emcore SNAP12
 Both specified @ 3.5 Gbps
Recent news/results
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Delivery date for Reflex Photonics SNAP12
@ 6.25 Gbps still +6 weeks
 First promised for July 1
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Both RP and Emcore 3.5 Gbps versions can
run at higher speeds
 Emcore shows better performance (up to 5
Gbps) based on measured BER
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Optical Link Notes
Designing @ 6.25 Gbps and beyond
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Measurements with AZ test board
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Optical Link Notes
Designing @ 6.25 Gbps and beyond
 Vias degrade eye pattern
 No difference in trace length or layer
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Optical Link Notes
In order to move to higher optical
density we are now designing with
Reflex Photonics LightABLE OE
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OSA is an IC with 12 channel GaAs VCSEL
or 12 channel GaAs PIN photodetector
 Connected electrically via wire bonds
 Connected optically via MT connector
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Present speed @ 6.25 Gbps
Designer provides an electrical footprint on
the PCB
RP mounts (wirebonds) the OSA
 OE part and mounting cost is ~$350 / die
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Optical Link Notes
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ATCA Sub-ROD Development (BNL)
Zone 3
(to transition module)
LVL1 communication
Update Channel
Global Clocks
12 fiber inputs on
SNAP12 format
DDR2
SODIMM Memory
Base Interface
(Gigabit Ethernet)
Fabric Interface
(10Gig Ethernet)
Virtex-5 FXT
FPGA
Serial Debug
Port
-48v Power Input and
IPMI interface
Power Conversion
ATCA Sub-ROD Development
 AdvancedTCA 8U Module
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With separated +5V power connector and Gigabit Ethernet
connector on front panel, it allows testing of main functions
without ATCA crate
IPMI development is underway, received development document
and source code from DESY. Even though we use different
processor, all the code is in C which helps software porting
 One module was shipped to Dresden in late June/early
July
 High Speed Parallel Optical Links and FPGA SERDES
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Self loopback test works at 3.2Gbps on 12 channels, 40Gbps
total bandwidth
Sub-ROD (and sub-ROD injector) still awaiting 75 Gbps
transceiver from Reflex Photonics
Present plan is to do sub-ROD and sub-ROD injector integration
tests in October using Emcore parts which can run over spec
ATCA Sub-ROD Injector (AZ)
Sub-rod injector ATCA card also now
available
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ATCA Sub-ROD Injector (AZ)
Testing with test
ATCA backplane
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ATCA Sub-ROD Injector (AZ)
Details of test backplane
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ATCA Sub-ROD Injector (AZ)
Eventual testing in ATCA crate
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ROD in ATCA/AMC Form Factor
 Present plan is to build processing units (ROD
or ROD injectors) in AMC format on ATCA
cards
 ROBs would also reside in ATCA crate
AMC PU
LVL 1 Interf ace
Up to 48 Fiber’s per
AMC (4 - SNAP12)
AMC PU
AMC PU
AMC PU
Connection to ROB
through ATCA
backplane using
10Gigabit Ethernet
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ROD in ATCA/AMC Form Factor
 AMC cards are Processing Units
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Contain optical receivers and FPGA based SERDES
Perform energy calculations and partial Level-1 sums
High speed, low latency connections for Level-1 sums
require communication between AMC modules and
possibly between different ATCA carriers
Processing units can be developed independently of
ATCA carrier board (using MicroTCA crate)
 ATCA Carrier Board
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Provides connections between AMC modules and also
to ATCA backplane
Low latency switching protocol
Possible connection to ROB via 10G Ethernet
Provides connections to rear transition board for Level1 sums
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AMC Card using LOB
4 x 12 channels per AMC card
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Stratix IV has 48 transceiver channels @
8.5 Gbps
4 AMC cards per ATCA (ROD)
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AMC Card using LOB
4 x 12 channels per AMC card
 Stratix IV has 48 transceiver channels @ 8.5
Gbps
4 AMC cards per ATCA (ROD)
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ATCA/AMC Form Factor
Working plan is to build ROD (and ROS)
cards on ATCA cards
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ROD receive modules in AMC format
ROD injector transmit modules in AMC
format
ATCA sub-ROD already exists (BNL)
ATCA sub-ROD injector now exists (AZ)
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ATCA sub-ROD injector can also be used to
hold sub-ROD injector AMC card
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sLHC LAr ROD Upgrade R&D
Mailing list
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[email protected]
CERN espace
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https://espace.cern.ch/slhc-atlas-lar-rod
Phone meeting
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First meeting was organized on Sept. 11th,
people from Univ. of Arizona, BNL, Dresden,
LAPP and Stony Brook Univ. were connected
Goal was to update what everybody’s been
working on and discuss how to proceed
Plan to continue this phone meeting once a
month
Optical Link Notes
Designing @ 6.25 Gbps and beyond
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Hyperlynx SI software
 Good for impedance estimation
 Less useful eye patterns (2.5 - 6 GHz below)
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ATCA Sub-ROD Injector (AZ)
Eventual testing in ATCA crate
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