DNA/DNR-429-512/566 ARINC 429 Layer
Chapter 1
12
Introduction
Tel: 508-921-4600
www.ueidaq.com
Vers:
4.5
Date: December 2013
DNx-429-Chap1x.fm
© Copyright 2013
United Electronic Industries, Inc.
1.7.3
Label
Acceptance
Filter
The Label Acceptance Filter is a table with 255 10-bit entries.
Table 1-3
describes the format of each entry.
Table 1-3. Label Acceptance Filter
Bit
Name
Description
Reset
State
31-9
RSV
Reserved/unused (should be written with 0 for
compatibility with future enhancements)
0
9
TE
Trigger Enable.
•
For RX0 only. A “1” in this bit indicates that a
Scheduler entry with the same index should
be set for execution (scheduled for output on
the ARINC-429 bus). Note that only the
“master” entry in the Scheduler may be
triggered this way.
•
For RX1, this bit is ignored.
8
ND
“New Data Only” flag. In “new data only” mode (set
via RX0 Control Register
AR566_Rx
, and if this bit is
set, only data that has changed since last reception is
placed into the FIFO and the “last data” memory.
NOTE:
For the 566 model, the “new data only” mode
is not available on loopback receivers.
0
7
LABEL
Acceptance label. If the label matches bits 7-0 of the
received frame, the frame is accepted by the filter.
NOTE:
1. 0x0 in the label and flag fields of first entry (with
index 0) in this table disables filtering, causing
the board to accept all ARINC data. If the FIFO
receiver is programmed to reject frames with par-
ity errors, however, such frames are still rejected.
2. 0x0 in any label other than those with index 0 dis-
ables the entry in the label acceptance filter.
When this occurs, the next entry is processed
instead.
3. Labels may be programmed, enabled, or dis-
abled at any time during operation.
4. For the 566 model, the Label Filter feature is not
available when RX1 is used as a loopback
receiver.
0
