IEEE-1394 Data Link Design Review Sherry Womack Erik Pace ECE 4040 Dr. Martin Brooke

Overall View of Project

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

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.

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

1394 Protocol Stack and Serial Bus Management Controller

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.

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

Physical and Link Layer Connections

Cable Connections and Power Decoupling Network

Components

Vendors DigiKey Linear Technology Mouser National Semiconductor ON Semiconductor Texas Instruments

PCB Layout

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

Design Rules for PCB Layout Keep the cable signal lines the same length Add power decoupling networks as close as possible to power pins

Design Rules for PCB Layout Place the power regulator away from the twisted pair edges, the clock crystal and the physical layer Regulator Physical Layer Twisted pair edges Clock crystal

Backplane Layout

Unresolved Issues Initialization state Processing link layer data Format of camera data –Asynchronous –Isochronous

Upcoming Milestones Board fabrication Testing Determination of initialization state Transmission of data