CT2578 Datasheet, PDF (13/22 Pages) Aeroflex Circuit Technology – CT2578 / CT2581 SIMPLE REMOTE TERMINAL FOR MIL-STD-1553 / 1760 & McAir

RESERVED MODE CODES (09-0F)
* RESVD
CMD
STATUS
The status is not cleared or loaded before it is transmitted with the
message error bit set.
If the command was a broadcast the status transmission will be
suppressed and the broadcast bit in the status register set.
Error Conditions
Action taken by device
1. Invalid command.
No response.
Command ignored.
2. Command followed by
another word.
No status response.
Set message error.
Sequence terminated.
3. T/R bit of command set
to zero.
No status response.
Set message error.
Sequence terminated
4. T/R bit of command set
to zero and broadcast
address
No status response.
Set message error.
Set broadcast.
Sequence terminated.
TRANSMIT VECTOR WORD (10)
* TX VW
CMD
STATUS VW
On receipt of a valid Command to transmit the Vector Word the
device will initially respond with Status.
After the Status response has been initiated the Vector Word will
be enabled onto T0-T15 from the subsystem with signal NENVW
and transferred to the Output Buffer ready for transmission onto the
1553 data bus following the Status.
Error Conditions
1. Invalid command.
2. Command followed by
another word.
3. T/R bit of command set
to zero.
4. Broadcast address.
5. T/R bit of command set
to zero and broadcast
address
Action taken by device
No response.
Command ignored.
No status response.
Set message error.
Sequence terminated.
No status response.
Set message error.
Sequence terminated
No status response.
Set message error.
Set broadcast.
Sequence terminated.
No status response.
Set message error.
Set broadcast.
Sequence terminated.
SYNCHRONIZE WITH DATA WORD (11)
* ^SYNC
CMD
DATA
STATUS
The Synchronize data word received is stored in the data buffer
memory until message validation is complete after which the
device will respond with Status.
If the command was a broadcast the status transmission will be
suppressed and the broadcast bit in the status register set.
After the Status response has been initiated the Synchronize Word
will be transferred to the subsystem. The NSYNC signal will go
active low for 500 nS during which time T0-T15 will be set to the
data word received.
Error Conditions
1. Invalid command.
2. Command not followed
contiguously by data
word
3. Command followed by
too many words.
4. T/R bit of command set
to one.
5. T/R bit of command set
to one and broadcast
address
Action taken by device
No response.
Command ignored.
No status response.
Set message error.
Sequence terminated.
No status response.
Set message error.
Sequence terminated
No status response.
Set message error.
Sequence terminated.
No status response.
Set message error.
Set broadcast.
Sequence terminated.
TRANSMIT LAST COMMAND (12)
* TX LST
CMD
STATUS
LST
CMD
The status response contains the resulting status from the previous
command.
The data word transmitted following the status word contains the
previous valid command (provided it was not Transmit Last
Command).
SCDCT2578 REV B 3/11/98
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