HI-6121PQMF HOLTIC [Holt Integrated Circuits], HI-6121PQMF Datasheet - Page 85

• 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
Valid receive
command followed
by invalid data word
(Manchester, parity
or bit count error).
Superseded Message:
Terminal receives an
incomplete message
interrupted by a gap
of at least 3.5 us,
followed by a new
valid command on
the same bus or
on the other bus
——— OR ———
Terminal is transacting
a transmit message on
one bus and receives
the start of a valid
command on the other
bus.
Terminal is Busy for a
valid receive command
either globally (BUSY
bit set in Status Word
Bits register) or in
response to a particular
valid receive command
(MKBUSY bit set in the
command’s Descriptor
Table control word.)
Terminal is Busy for a
valid transmit command
either globally (BUSY
bit set in Status Word
Bits register) or in
response to a particular
valid receive command
(MKBUSY bit set in the
command’s Descriptor
Table control word.)
FOLLOWING PAGES LIST THE DETAILED RESPONSES FOR MODE CODE COMMANDS
Terminal Response
to Received Command
No terminal response.
Set Status Word ME bit,
If broadcast, also set
Status Word BCR bit.
Terminal aborts processing
for first message and
responds in full to the
second (superseding)
message. The Status
Word BCR bit reflects
broadcast status for:
the second command,
unless second command
is MC2 (transmit status)
or MC18 (transmit last
command).
Busy bit is set in the 1553
Status Bits register. Status
Word is transmitted,
unless broadcast. If
broadcast, the BCR bit
in Status Word is also
set. After message
completion, data words
received are stored in
the data buffer assigned
by the receive subaddress
Descriptor Table entry.
Busy bit is set in the 1553
Status Bits register. If not
broadcast, Status Word is
transmitted without data.
If broadcast, the BCR bit
in Status Word is also
set.
FOR THE HI-6120 / HI-6121 REMOTE TERMINAL
SUMMARY OF MESSAGE RESPONSES
HOLT INTEGRATED CIRCUITS
HI-6120, HI-6121
PER MIL-STD-1553B
85
Bits Updated
in Descriptor
Control Word
DBAC bit set.
BCAST bit updated.
DPB bit toggles.
No change
to superseded
command’s
Control Word.
——————
For superseding
command’s
Control Word:
DBAC bit set.
BCAST bit updated
DPB bit toggles.
DBAC bit set.
BCAST bit updated.
DPB bit toggles.
DBAC bit set.
BCAST bit updated,
(mode commands
with T/ = 1)
DPB bit toggles
R
Bits Updated
in Data Buffer
Msg Info Word
MERR bit set.
BUSID bit updated.
IWDERR bit set.
ILCMD bit reset.
RTRT bit updated.
(Other error bits reset.)
No Msg Info
Word written for
the superseded
command.
——————
For superseding
command’s
data buffer, a
normal CS update:
BUSID bit updated.
MERR bit reset.
ILCMD bit reset.
RTRT bit updated.
(All error bits reset.)
WASBSY bit set.
BUSID bit updated.
MERR bit reset.
ILCMD bit reset.
RTRT bit updated.
(All error bits reset.)
WASBSY bit set.
BUSID bit updated.
MERR bit reset.
ILCMD bit reset.
RTRT bit updated.
(All error bits reset.)
superseded
command
Interrupt
————
Options
None for
(IXEQZ)
MERR
IWA
IWA
IWA
IWA
IBR
IBR
IBR
IBR