HI-6121PQMF HOLTIC [Holt Integrated Circuits], HI-6121PQMF Datasheet - Page 103

• Manufacturer Part Number: HI-6121PQMF
• Description: MIL-STD-1553 Remote Terminal ICs
• Manufacturer: HOLTIC [Holt Integrated Circuits]

RT MESSAGE RESPONSES, OPTIONS & EXCEPTIONS, Cont.
Circumstances for
Received Message
Mode code commands
having mode codes
10110 through 11111
The mode code’s bit
in Illegalization Table
equals 1 **
(RT is using “illegal
command detection”)
The mode code’s bit
in Illegalization Table
equals 0 *
MC22-MC31 EXCEPTIONS:
Invalid command word.
.
T/ bit equals 0 and
mode code command
word is not followed by
a contiguous data word
(missing data word)
T/ bit equals 0 and
command word is
followed by data word
with Manchester or parity
error (bad data word)
T/ bit equals 1 and
mode code command
word is followed by a
contiguous data word
T/ bit equals 1 and
mode code command
is addressed to RT31
* Command is illegal but terminal is not using “illegal command detection” (in form response).
** Command is illegal and terminal is using “illegal command detection”
(RT not using “illegal
MODE CODES
command detection,”
respond “in form”)
MC22 - MC31
R
R
R
R
RESERVED
Terminal Response
to Received Command
The reserved mode code
commands do not have
defined actions.
Host must initialize device
to respond using either of
the two following methods:
Mode code is illegalized.
Set Message Error (ME)
status and transmit Status
Word. If T/ bit equals 1,
suppress data word transmission.
If T/ bit equals 1,
Reset Message Error (ME) status.
Transmit Status Word with contiguous
data word read from assigned index or
ping-pong buffer (or from Descriptor
Word 4 if the SMCP option applies.)
—————————
If T/ bit equals 0,
Reset Message Error (ME) status
and transmit Status. If broadcast,
also set BCR status and suppress
Status transmit. Device stores received
data word in assigned index or ping-
pong buffer (or in Descriptor Word 4
if SMCP Simplified Mode Command
Processing applies).
No terminal response,
the message is ignored.
No Status Word change.
No Status Word transmit.
Set the Message Error
(ME) status bit.
If broadcast, set the
BCR status bit.
No Status Word transmit.
Set the Message Error
(ME) status bit.
If broadcast, set the
BCR status bit.
No Status Word transmit.
Set the Message Error
(ME) status bit.
No Status Word transmit.
Set the Message Error
(ME) and BCR status bits.
R
R
R
FOR THE HI-6120 / HI-6121 REMOTE TERMINAL
SUMMARY OF MESSAGE RESPONSES
HOLT INTEGRATED CIRCUITS
HI-6120, HI-6121
103
Bits Updated
in Descriptor
Control Word
DBAC bit set.
BCAST bit reset.
DPB bit toggles.
DBAC bit set.
BCAST bit reset.
DPB bit toggles.
—————————
DBAC bit reset.
BCAST bit updated.
DPB bit toggles.
No change.
DBAC bit set.
BCAST bit updated.
DPB bit toggles.
DBAC bit set.
BCAST bit updated.
DPB bit toggles.
DBAC bit set.
BCAST bit reset.
DPB bit toggles.
DBAC bit set.
BCAST bit set.
DPB bit toggles.
Bits Updated
in Data Buffer
Msg Info Word
ILCMD bit set.
MERR bit set.
BUSID bit updated.
RTRT bit reset.
(Other error bits reset.)
Normal CS update:
BUSID bit updated.
MERR bit reset.
ILCMD bit reset.
RTRT bit reset.
(All error bits reset.)
—————————
Normal CS update:
BUSID bit updated.
MERR bit reset.
ILCMD bit reset.
RTRT bit reset
(All error bits reset.)
No Message Info
Word is written
MERR bit set.
WCTERR bit set.
BUSID bit updated.
ILCMD, RTRT bits reset.
(Other error bits reset.)
MERR bit set.
IWDERR bit set.
BUSID bit updated.
ILCMD, RTRT bits reset.
(Other error bits reset.)
MERR, WCTERR bits set. MERR
BUSID bit updated.
ILCMD, RTRT bits reset.
(Other error bits reset.)
MERR bit set.
BUSID bit updated.
ILCMD, RTRT bits reset.
(Other error bits reset.)
Interrupt
Options
ILCMD
———
MERR
MERR
MERR
None
IWA
IWA
IWA
IWA
IWA
IWA
IWA
IBR
IBR
IBR
IBR