Features

• 12 ARINC 429 RX channels


• High (100 kHz) or low (12.5 kHz) speed selectable by channel.


• Hardware Label filtering


• Hardware TX scheduler (100 µs timing resolution)


• Automatic timestamping of RX data (if desired)


• Powerful API included

General Description

The DNR-429-566 is a 12 channel (6 TX, 6 RX) ARINC-429 communication interface. The board is fully compliant with the ARINC 429 spec and supports both high speed (100 kHz) and low speed (12.5 kHz)
operation. The channel speed is software selectable in banks of either two channels. Data integrity, even when all channels are set in high speed mode is assured with the use of 256 word FIFOs on all RX and TX channels. Only the RX channels may be utilized while operating the Cube as a logger. However, the UEILogger is fully compatible with UEI's DAQ framework and the TX channels may be enabled and written to by a host computer.




Receive channels include the ability to filter on Labels so that only data from selected channels is captured. The filter may be set to forward data from between one and 255 Labels, or may be disabled so all data
is captured, regardless of source. The user may also select on a label by label basis whether all data is forwarded or only data which has changed since the last transmission. Each channel may be set such that data Receive filtering is also supported based on the Source/Destination Identifier (bits 9 & 10). Words that match the desired SDI
are forwarded while those that do not are ingnored. Each received word may be time stamped with the date and time of reception
(10 µs resolution). Parity errors may either be flagged and errant data trapped at the board level, or RX channels may be configured to
forward data with an illegal parity bit.




Transmit channels may be set to transmit asynchronously or based upon a hardware controlled scheduler. Each channel supports a transmission table that allows up to 256 unique schedules. Transmission schedule resolution is 100 microsecond. There is also a TX mode where
a label is transmitted only upon receipt of data from a preprogrammed
label.



Asynchronous (non-scheduled) data may be sent with three
priorities. High priority data is sent immediatley upon completion of
the current transmission, regardless of scheduled messages. Data sent
with standard priority is transmitted during times when no scheduled
data is being sent. Finally, the lowest priority is data streamed from
a 256 word FIFO which is sent when no scheduled, high or standard
priority data is being transmitted.