DNA/DNR-429-512/566 ARINC 429 Layer
Chapter 1
3
Introduction
Tel: 508-921-4600
www.ueidaq.com
Vers:
4.5
Date: December 2013
DNx-429-Chap1x.fm
© Copyright 2013
United Electronic Industries, Inc.
1.2
The 429-512/
566 Interface
Board
The DNA- and DNR-429-512/566 layer is a 12-channel ARINC transmit/receive
interface for the Cube/RACKtangle I/O chassis respectively, designed for serial
communication in avionics applications using the ARINC 429 protocol. It has 12
ARINC 429 channels that can be specified in either of two configurations: (1) as
6 TX and 6 RX channels (DNx-429-566), or (2) 12 RX channels (DNx-429-512).
The boards comply with the ARINC 429 specification and can run at either high
speed (100 kHz) or low speed (12.5 kHz). The speed is software-selectable on
a per port pair basis (see page 10). To ensure data integrity, 256-word FIFOs are
provided on every TX and RX channel.
In addition, the DNx-429-566/512 ARINC layer has 3x current sinking (350 mA
max), low-side FET, general purpose digital output with 500 mA resettable fuse.
Software supplied with the boards permits you to select options such as:
•
Receive Filter size (1 to 255) or disable
•
Source/Destination filter (SDI) enable/disable
•
“Forward changed data only” filter enable/disable
•
Parity check enable/disable
•
Date/Time Stamping enable/disable by label or globally
•
Transmit mode – Scheduled or Asynchronous
•
Scheduling Table size – Up to 256 labels per channel
•
Asynchronous TX Modes –
High priority
– transmit immediately regardless of schedule
Standard priority
– transmit when no scheduled data is present
FIFO based
– transmit when no other data is being sent
With this layer, you can realize the benefits of using a UEI Cube in avionics
applications in any of its forms — PowerDNA, UEILogger, or UEIPAC — with
communications handled by the ARINC 429 protocol.
