HI-3200PCTF View Datasheet(PDF) - Holt Integrated Circuits
Part Name
Description
MFG CO.
'HI-3200PCTF' PDF : 59 Pages View PDF
HI-3200, HI-3201
ARINC 429 BYTE 1 DESCRIPTOR
Op-Code
Index
Value
76543210
76543210
MSB
LSB MSB
LSB
ACTION BYTE
VALUE BYTE
Op-Code Index
000
XXXXX
Value
XXXXXXXX
001
XXXXX
XXXXXXXX
010
XXXXX
LLLLLLLL
011
CCCXX
LLLLLLLL
100
CCCBB
LLLLLLLL
101
CCCBB
LLLLLLLL
110
XBBBB
NNNNNNNN
111
XBBBB
NNNNNNNN
Description
End of sequence. When op-code 000 is encountered by the sequencer
before it reaches sequence number 255, the sequencer resets to zero and
begins the next transmission cycle starting at descriptor number 0 as soon
as the repitition rate counter rolls over. Note that the descriptor table is
cleared following Master Reset, so no ARINC 429 transmissions are
possible until the sequence table has been configured.
No-operation. This descriptor is ignored and the sequencer increments to
the next descriptor in the sequence. This opcode may be used to temporarily
suspend transmission of a particular message in the sequence, without
having to modify the remaining bit fields of the descriptor or reloading the
entire descriptor block in order to delete the entry.
Immediate data. The value contained in the descriptor value data byte is
loaded into byte 1 (the ARINC 429 “label” byte) of the ARINC
429 label to be transmitted.
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 as Byte 1 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 referenced ARINC RAM block is reset.
Indexed data. The value of ARINC Data RAM location defined by channel
“CCC”, label block “LLLLLLLL” and byte number “BB” is loaded into byte 1 of
the ARINC 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 as Byte 1 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
referenced ARINC RAM block is reset.
CAN byte. The value of the byte at CAN RAM address filter block
“NNNNNNNN”, byte number “BBBB” is loaded into the ARINC buffer byte 1
position to be transmitted.
CAN byte conditional. The NEWTXn bit corresponding to the CAN RAM
address filter block “NNNNNNNN”, byte number “BBBB” is read. The
corresponding byte is used as Byte 1 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 ARINC word
construction is terminated, no transmission occurs for this frame and the
sequencer increments to the next descriptor frame. The NEWTXn bit for the
referenced CAN RAM address filter block is reset.
HOLT INTEGRATED CIRCUITS
29
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