HI-6120_15 Datasheet, PDF (134/162 Pages) Holt Integrated Circuits – MIL-STD-1553 Remote Terminal ICs

HI-6120, HI-6121
Circumstances for
Received Message
Terminal Response to
Received Command
Bits Updated
in Descriptor
Control Word
Bits Updated in Data Interrupt
Buffer Msg Info Word Options
OVERRIDE INHIBIT Default response: Reset
TERMINAL FLAG BIT Message Error (ME) status
(MC7):
then transmit Status Word.
Mode code command If broadcast, set the
with mode code 00111 Status Word BCR bit and
and T/R bit equals 1 suppress status transmit.
Normal CS update:
DBAC bit reset. BUSID bit updated.
BCAST bit
MERR bit reset.
IWA
updated.
ILCMD bit reset.
IBR
DPB bit toggles. RTRT bit reset.
(All error bits reset.)
The device automatically resets the TF Inhibit bit in the BIT Word register at address 0x0013. While the TF inhibit
bit is reset, the device transmits status with the Terminal Flag status bit set if the Terminal Flag (TF) bit is asserted
in the 1553 Status Bits register (0x0006).
MC7 EXCEPTIONS:
Invalid command word.
OR
T/R bit equals 0 and
UMCINV bit in Config.
Register 1 equals 1 ***
No terminal response,
the message is ignored.
No Status Word change.
(mode code is undefined
when T/R bit equals 0)
No Change
No Message Info
Word is written
None
T/R bit equals 0
AND
UMCINV bit in Config.
Register 1 equals 0.
The Illegalization Table
bit equals 0 *
Respond “In form”: Reset
Message Error (ME) status.
If not broadcast, transmit
Status Word. If broadcast,
set the BCR status bit and
suppress status response.
Normal CS update:
DBAC bit set. BUSID bit updated.
BCAST bit
MERR bit reset.
IWA
updated.
ILCMD bit reset.
IBR
DPB bit toggles. RTRT bit reset.
(Other error bits reset.)
T/R bit equals 0
AND
UMCINV bit in Config.
Register 1 equals 0.
The Illegalization Table
bit equals 1 **
Set Message Error (ME)
status. If not broadcast,
transmit Status Word.
If broadcast, also set
Status Word BCR bit and
suppress Status response.
DBAC bit set.
BCAST bit
updated.
DPB bit toggles.
ILCMD bit set.
MERR bit set.
BUSID bit updated.
RTRT bit reset.
(Other error bits reset.)
ILCMD
IWA
IBR
Mode code command
word is followed by a
contiguous data word
No Status Word transmit.
Set the Message Error
(ME) status bit.
DBAC bit set.
BCAST bit reset.
DPB bit toggles.
MERR bit set.
WCTERR bit set.
BUSID bit updated.
ILCMD bit reset.
RTRT bit reset.
(Other error bits reset.)
MERR
IWA
* Command is illegal but terminal is not using “illegal command detection” (in form response).
** Command is illegal and terminal is using “illegal command detection”
*** Undefined mode command rendered invalid by UMCINV option bit. Command’s bit in Illegalization Table is “don’t care”.
HOLT INTEGRATED CIRCUITS
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