Chapter 4
Receive/ Monitor Mode
page 4 - 8
Excalibur Systems
4.3
Look-up Table Mode Operation
4.3.1
Receive Look-Up Table Storage Sequence
In the Look-up table mode, the Word’s
label
is used by the module as an offset to a
256-word Look-up table. You can program the table with address pointers
indicating where to write the Receiver Data Block. Each block contains the 32-bit
ARINC word, 32-bit Time Tag, and status word. The 256-word table can be
placed anywhere in the memory via a Receiver Look-up Table Pointer that you
can program.
You can poll the operational status of each channel and generate interrupts in
various circumstances.
4.3.2
Receive Look-Up Table Mode Diagram
Figure 4-6
Receive Look-up Table Mode Structure
Label 0
Address Pointer
Label x
Address Pointer
.
.
.
.
.
Receive Look-Up
Table Pointer
Label x
Address Pointer
Label 377 (octal)
Address Pointer
256 x 16
Table per Channel
.
.
.
.
Data Word -Lo
Time Tag - Hi
Data Word - Hi
Time Tag - Lo
Receive Status/Control Word
Data Word - Lo
Time Tag - Hi
Data Word - Hi
Time Tag - Lo
Receive Status/Control Word
Receive Data Blocks
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