IEEE-1394 Data Link

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IEEE-1394 Data Link

• Design Review
• Sherry Womack
• Erik Pace
• ECE 4040
• Dr. Martin Brooke

2
Overall View of Project
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Introduction

• What is IEEE-1394?
• FireWire
• IEEE 1394-1995 Standard for a High Performance
  Serial Bus.
• A standard for high-speed data communication
  between multimedia products.

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Advantages of 1394

• Versatility
• Can link up to 63 devices without additional
  hardware.
• High speed
• 100 Mbps, 200 Mbps, 400 Mbps, or 1.2 Gbps.
• Low cost
• Cost of implementation less than technology
  replaced.
• Ease of installation and use
• Extends Plug and Play features beyond confines of
  PC.

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What protocols does 1394 define?

• Physical
• Bits on a wire
• Arbitration
• Reset and bus configuration
• Link
• Packets on the wire
• Transaction
• Read, write, lock, etc.
• Bus Management

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1394 Protocol Stack and Serial Bus Management
Controller
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Physical Layer Chip

• TSB41LV03A IEEE 1394a Three-Port Cable
  Transceiver/Arbiter.
• Provides digital and analog transceiver functions
  needed to implement a 1394 network.
• Includes circuitry to monitor line conditions,
  for initialization and arbitration, and for
  packet reception and transmission.

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Link Layer Chip

• TSB12LV42 (DVLynx) IEEE 1394-1995 Link Layer
  Controller for Digital Video.
• 1394 interface for high speed audio, video, and
  data applications.
• Provides a bulky data interface that supports
  long term data rates up to 60 Mbps.

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Physical and Link Layer Connections
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Cable Connections and Power Decoupling Network
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Components
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Vendors

• DigiKey
• Linear Technology
• Mouser
• National Semiconductor
• ON Semiconductor
• Texas Instruments

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PCB Layout
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Design Rules for PCB Layout

• Minimize the length of the etches between the
  physical layer and the cable connector
• Minimize the length of the etches between the
  physical and link layers

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Design Rules for PCB Layout

• Keep the cable signal lines the same length
• Add power decoupling networks as close as
  possible to power pins

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Design Rules for PCB Layout
Regulator

• Place the power regulator away from the twisted
  pair edges, the clock crystal and the physical
  layer

Physical Layer
Twisted pair edges
Clock crystal
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Backplane Layout
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Unresolved Issues

• Initialization state
• Processing link layer data
• Format of camera data
• Asynchronous
• Isochronous

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Upcoming Milestones

• Board fabrication
• Testing
• Determination of initialization state
• Transmission of data