HI-6121PQMF HOLTIC [Holt Integrated Circuits], HI-6121PQMF Datasheet - Page 91

• 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 command
with mode code 00101
and T/ bit equals 1
MC5 EXCEPTIONS:
Invalid command word.
——— OR ———
T/ bit equals 0 and
UMCINV bit in Config.
Register 1 equals 1 ***
——— AND ———
UMCINV bit in Config.
Register 1 equals 0.
The Illegalization Table
bit equals 0 *
——— AND ———
UMCINV bit in Config.
Register 1 equals 0.
The Illegalization Table
bit equals 1 **
Mode code command
word is followed by a
contiguous data word
* 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”.
TRANSMITTER
T/ bit equals 0
T/ bit equals 0
R
SHUTDOWN
OVERRIDE
R
R
(MC5)
R
Terminal Response
to Received Command
Default response: Reset
Message Error (ME) status
then transmit Status Word.
If broadcast, set the
Status Word BCR bit and
suppress status transmit.
This command is only used
with dual redundant buses.
After Status transmission,
reactivate inactive bus:
The device automatically re-enables
the state of the SDSEL bit in Configuration Register 2. The device affirms reenabled bus status
by resetting all four TXASD, TXBSD, RXASD and/or RXBSD bits in the Built-In Test Register
at register address 0x0014.
Note: If the TXINHA or TXINHB input pins are asserted, the device cannot override the
resulting hardware transmit inhibit for the affected bus. In this case, the corresponding TXASD
and/or TXBSD bits remain high. See Built-In Test Register description for further information.
No terminal response,
the message is ignored.
No Status Word change.
(mode code is undefined
when T/ 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.
Set Message Error (ME)
status. If not broadcast,
transmit Status Word.
If broadcast, also set
Status Word BCR bit and
suppress Status response.
No Status Word transmit.
Set the Message Error
(ME) status bit.
R
FOR THE HI-6120 / HI-6121 REMOTE TERMINAL
SUMMARY OF MESSAGE RESPONSES
HOLT INTEGRATED CIRCUITS
HI-6120, HI-6121
transmit and receive
91
Bits Updated
in Descriptor
Control Word
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.
for the inactive bus, regardless of
Bits Updated
in Data Buffer
Msg Info Word
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
Normal CS update:
BUSID bit updated.
MERR bit reset.
ILCMD bit reset.
RTRT bit reset.
(All error bits reset.)
ILCMD bit set.
MERR bit set.
BUSID bit updated.
RTRT bit reset.
(Other error bits reset.)
MERR bit set.
WCTERR bit set.
BUSID bit updated.
ILCMD bit reset.
RTRT bit reset.
(Other error bits reset.)
Interrupt
Options
ILCMD
MERR
None
IWA
IWA
IWA
IWA
IBR
IBR
IBR