HI-6120_12 Datasheet, PDF (132/158 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
RESET REMOTE
TERMINAL (MC8):
Mode code command
with mode code
01000
and T/R bit equals 1
Default response: Reset
Message Error (ME)
status. If not broadcast,
transmit Status Word.
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.)
After Status transmission, the device automatically resets the status Message Error (ME) Busy and Broadcast
Command received (BCR) bits in its internal status register. The BIT Word at shared RAM address is reset to
0x0000. If either transmitter was shutdown, the shutdown condition is overridden. If the Terminal Flag (TF) status
bit was inhibited, the inhibit is reset.
This command does not reset any of the host-programmed registers that configure the terminal for operation. To
complete the terminal reset process, the host must assert either MR hardware master reset (with or without auto-
initialization) or assert the SRST bit in Configuration Register 1 to execute software reset. See following section
entitled Reset and Initialization for additional details. Because MC8 requires host interaction, most applications
will probably utilize the IWA interrupt to alert the host when received.
MC8 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.
GAPERR 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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