HI-3210
Op-Code
Index
Value
ARINC 429 BYTES 2 - 4 DESCRIPTOR
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
LSB
LSB
MSB
MSB
ACTION BYTE
VALUE BYTE
Op-Code
Index
Value
Description
000
001
010
XXXXX
XXXXX
XXXXX
XXXXXXXX
XXXXXXXX
LLLLLLLL
No-Op op-code. ARINC 429 word construction will be terminated and the
sequencer will move on to the next descriptor in the table.
No-Op op-code. ARINC 429 word construction will be terminated and the
sequencer will move on to the next descriptor in the table.
Immediate data. The value contained in the descriptor value data byte is
loaded into this byte position of the ARINC 429 32-bit message to be
transmitted.
011
CCCXX
LLLLLLLL
Immediate data conditional. The NEWTXn bit corresponding to the ARINC
Data RAM location defined by channel “CCC” and label block “LLLLLLLL” is
read. LLLLLLLL is used if NEWTXn is set for this or any other
conditional opcode within this descriptor frame. If NEWTXn = 0 for all
conditional op codes (within this descriptor frame) then no transmission
occurs for this frame and the sequencer increments to the next descriptor
frame. The NEWTXn bit for the referencedARINC RAM block is reset.
100
101
CCCBB
CCCBB
LLLLLLLL
LLLLLLLL
Indexed data. The value of ARINC Data RAM location defined by channel
“CCC”, label block “LLLLLLLL” and byte number “BB” is loaded into this byte
position of theARINC 429 label to be transmitted.
Indexed data conditional. The NEWTXn bit corresponding to the ARINC
Data RAM location defined by channel “CCC”, label block “LLLLLLLL” and
byte number “BB” is read. The corresponding byte is used if
NEWTXn is set for this or any other conditional opcode within this
descriptor frame. If NEWTXn = 0 for all conditional op codes (within this
descriptor frame) then no transmission occurs for this frame and the
sequencer increments to the next descriptor frame. The NEWTXn bit for the
referencedARINC RAM block is reset.
110
111
XXXX
XXXX
XXXXXXXX
XXXXXXXX
Reserved. Do not use.
Reserved. Do not use.
HOLT INTEGRATED CIRCUITS
24
HOLTIC [ HOLT INTEGRATED CIRCUITS ]
