HI-6120 HOLTIC [Holt Integrated Circuits], HI-6120 Datasheet - Page 136

• Manufacturer Part Number: HI-6120
• Description: MIL-STD-1553 Remote Terminal ICs
• Manufacturer: HOLTIC [Holt Integrated Circuits]

* 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”.
Circumstances for
Received Message
TRANSMIT LAST
COMMAND (MC18):
Mode code command
with mode code
10010
and T/R bit equals 1
Transmitted data word is automatically provided from an internal register, and is copied to assigned index or ping-
pong buffer (or to Descriptor Word 4 for SMCP Simplified Mode Command Processing)
MC18 EXCEPTIONS:
Broadcast address
RT31 (broadcast not
allowed)
Invalid command word.
OR
T/R bit equals 0 and
UMCINV bit in Config.
Register 1 equals 1 ***
T/R bit equals 0
AND
UMCINV bit in Config.
Register 1 equals 0.
The Illegalization Table
bit equals 0 *
T/R 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
Terminal Response to
Received Command
Default response: Status
is not updated. Transmit
Status Word from the previous
command, with data word
containing the last valid
command word (assuming it
was not a “Transmit Status” or
a “Transmit Last Command”
mode command.
No Status Word transmit.
Set the Message Error
(ME) and BCR status bits.
No terminal response,
the message is ignored.
No Status Word change.
(mode code is undefined
when T/R 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. If broadcast,
set the BCR status bit.
HOLT INTEGRATED CIRCUITS
HI-6120, HI-6121
136
Bits Updated
in Descriptor
Control Word
DBAC bit reset.
BCAST bit reset.
DPB bit toggles.
DBAC bit set.
BCAST bit set.
DPB 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.
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.)
MERR bit set.
BUSID bit updated.
ILCMD bit reset.
RTRT bit reset.
(Other error bits reset.)
No Message Info
Word is written
Normal CS update:
BUSID bit updated.
MERR bit reset.
ILCMD bit reset.
RTRT bit reset.
(Other 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
IWA
MERR
IWA
IBR
None
IWA
IBR
ILCMD
IWA
IBR
MERR
IWA
IBR