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Time-Triggered Ethernet for Hard Real-Time Data Communication

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TTE Development Switch<br />

<strong>Time</strong>-<strong>Triggered</strong> <strong>Ethernet</strong> <strong>for</strong> <strong>Hard</strong> <strong>Real</strong>-<strong>Time</strong> <strong>Data</strong> <strong>Communication</strong><br />

The TT<strong>Ethernet</strong> technology enables hard real-time operation in distributed systems based on <strong>Ethernet</strong><br />

networks. TT<strong>Ethernet</strong> switches maintain the hard real-time data communication and take care of partitioning<br />

among standard <strong>Ethernet</strong>, rate-constrained and time-triggered <strong>Ethernet</strong> message traffic. High-priority timetriggered<br />

messages are routed through the switch according to a predefined schedule with transport delay<br />

jitter in the sub-microsecond range. All other <strong>Ethernet</strong> messages are <strong>for</strong>warded when the bandwidth is<br />

available.<br />

The TTE Development Switch is based on an Altera Stratix II GX FPGA board and offers four 1 Gbit/s ports,<br />

each one connected either via a small <strong>for</strong>m factor pluggable (SFP) module or an RJ-45 connector. The SFP<br />

slots are populated with 850 nm optical LC modules.<br />

Using TTE Load, the configuration data of the TTE Development Switch can be updated via the network. These<br />

data will be stored to its non-volatile memory and will become effective at the next power-up or reset.<br />

TTTech Computertechnik AG<br />

Schoenbrunner Str. 7, A-1040 Vienna, Austria, Tel. +43 1 585 34 34-0, Fax +43 1 585 34 34-90, office@tttech.com, www.tttech.com


Device Features<br />

Four 1 Gbit/s ports – either copper or SFP<br />

Configuration data programmable via the network<br />

TT<strong>Ethernet</strong> Features<br />

System-wide synchronized time base<br />

Store-and-<strong>for</strong>ward message relay mechanism<br />

Basic firewall capabilities<br />

Standard IEEE 802.3 flow control mechanism<br />

Three different traffic classes:<br />

<strong>Time</strong>-triggered messages with arrival window checking and deterministic delay<br />

Rate-constrained messages with bag checking<br />

Standard <strong>Ethernet</strong> messages with IEEE 802.3 flow control<br />

Multi-hop capability: switches can be linked together and synchronized to each other<br />

Subject to changes and corrections.<br />

For further in<strong>for</strong>mation, including price and availability, contact products@tttech.com.<br />

TT<strong>Ethernet</strong> is a registered trademark of TTTech Computertechnik AG. All other trademarks are the property of their respective holders.<br />

Copyright © 2008, TTTech Computertechnik AG. All rights reserved. D-DEVSW-E-04-001 V1.0

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