High Speed Data Interconnect for BEE

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High Speed Data Interconnect for BEE

• 2003 BWRC Summer retreat
• Tina Smilkstein
• MCMA

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Whats this talk about?

• The BEE and its peripherals
• Present strategy for connecting BEE to
  peripherals (SCSI)
• Problems with present strategy
• Proposed solution Connecting optically using
  Xilinx Virtex II Pro serial data transceivers
• Target applications
• Future plans

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Present setup SCSI
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What SCSI gives us

• A (straight forward) parallel connection.
• Can go up to 40-50 MHz with 68 bits of parallel
  data.
• If run above this data rate, shielding is
  required and available data lines are reduced.

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The trouble with SCSI
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SCSI vs Optical Connections
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Issues with optical connections

• Error detection
• Parallel to serial conversion
• Serial to parallel conversion
• Timing recovery
• Finding data among bits
• Transceiver reliability

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Optical Interface Riser Board

• Eight transceivers available
• Run at 1GHz
• Full duplex
• Standardized link between BEE and future projects

9
Present Target Projects

• This type of link will become the standardized
  link between BEE and present and future projects
• MCMA
• Multi-carrier, Multi-antenna
• UWB
• Ultra Wide band

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Data needs

• UWB and MCMA Transmission Specs

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MCMA Board

• Design status
• Schematics done
• Parts selected
• Moving on to verification

Corner of MCMA board
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UWB Challenges

• 16 channels
• Use two riser boards?
• Or make one super 16-channel riser board?
• Synchronization of channels
• Make fewer channels with higher data rates?
• Or run all receivers asynchronously?
• Or use sophisticated packet ID system?
• Somehow synchronize clock between boards?

13
Future Plans

• Faster optical link
• TBEE synchronization
• How do you synchronize signals between a large
  number of interconnected chips?
• Examining high-speed signaling
• General high-speed communications