Time-Triggered Ethernet (TTE)

 

Time-Triggered Ethernet (TTE)

Time-Triggered Ethernet / ARINC 664 Part 7 (AFDX®) / IEEE 802.3 Ethernet Deterministic Communications

NAI’s Time-Triggered Ethernet (TTE) Module is used on our rugged COTS Multifunction Embedded I/O Boards, Single Board Computers (SBCs), and Configurable Systems offered in OpenVPX, cPCI, VME, and PCI/PCIe configurations.

Our Smart Function Modules provide uniquely flexible, mix & match customization options for use with our COTS hardware. Learn More

Module TE2

Module TE2 is one of NAI's latest generation of advanced function Configurable Open Systems Architecture™ (COSA®) compatible modules. The TE2 is a certifiable, single-port, tri-redundant, deterministic Ethernet communications interface module that supports TTTech’s certifiable TTEthernet® End System product consisting of three traffic classes: SAE AS6802 (Time-Triggered Ethernet), ARINC 664 Part 7 (Avionics Full-Duplex Switched Ethernet (AFDX®), and/or IEEE 802.3 best-effort protocol. By supporting all three traffic classes, NAI's TE2 is the ideal solution for current users of IEEE 802.3 Ethernet, who plan to upgrade to Deterministic Ethernet (ARINC 664 Part 7 (AFDX®) or Time-Triggered Ethernet SAE AS6802) protocols in the future at any time without changing hardware.

The key feature of the TE2 module is TTEthernet's ability to support all three protocols as required with triple-redundancy. IEEE 802.3 Ethernet is ubiquitous and has been the standard for many years. It provides best-effort data delivery, but does not provide any guarantee that the data was delivered or that the data was delivered in the sequence that it was sent. Deterministic Ethernet provides safety and mission critical quality of service in data transmission and reception: in the case of ARINC 664 Part 7, data sent from the TE2 through a policing AFDX® or TTE® switch is transmitted with bounded latency and jitter (millisecond precision); in the case of SAE AS6802, data sent from the TE2 through a policing TTE® switch is precisely scheduled with the highest priority and is transmitted at precise times with microsecond precision.

TE2 Block Diagram

ARINC 664 Part 7 (AFDX) / TTE Comparison


 


ARINC 664 Part 7 (AFDX)

TTE
Transmission Asynchronous Synchronous
Jitter Less than 500 µs Less than 1 µs
Latency (typical) 1-10ms Less than 100 µs, at 12.5 µs/switch

Both ARINC 664 Part 7 (AFDX) and TTE provide time-critical, safety-critical data transmission and receipt sent through a single-port, tri-redundant Ethernet module that can be optimized for specific applications.

Features

  • Three modes of Ethernet operation: IEEE 802.3; ARINC 664 Part 7 (AFDX®); SAE AS6802 TTE
  • Single-port, triple redundant Ethernet module that supports each protocol
  • Supports 10/100/1000 Mbps Ethernet
  • Currently supported on 75PPC1 (PPC P2041) with Wind RIver® VxWorks® 653 3.x or DDC-I Deos™; 68G5 Pending

 


Specifications

 
Communications: PCIe GenII (5.0 Gbps) Endpoint
Protocols: IEEE 802.3; ARINC 664 Part 7 (AFDX); SAE AS6802 TTEthernet
Etherent Standards IEEE 802.3

10 BASE-T
100 BASE-T
1000 BASE-T

Click below for datasheet:

Module Description Datasheet
TE2 Time-Triggered Ethernet / ARINC 664 Part 7 (AFDX®) / IEEE 802.3 Ethernet Deterministic Communications TE2 Datasheet

 

 

Function module(s) featured in products below:


ModelBoard TypeProcessorFunction Module SlotsMaximum MemoryMaximum StorageVideo OptionsEthernetAvailable O/S
75PPC13U cPCI SBCNXP® QorIQ® P2041 Quad-Core e500mc Processor @ 1.2 GHz28 GB DDR3L SDRAM32 GB SATAII NAND FlashN/A2 x GbWind River® VxWorks®
68PPC23U OpenVPX SBCNXP® QorIQ® T2080 Quad Core @1.5 GHz2 8 GB DDR3 SDRAM32 GB SATAII NAND FlashN/A2 x GbWind River® VxWorks®, DDC-I Deos OS Support