HI-6130_16 Datasheet, PDF (263/296 Pages) Holt Integrated Circuits – 3.3V BC / MT / RT Multi-Terminal Device

HI-6130, HI-6131
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
INHIBIT TERMINAL
FLAG BIT (MC6):
Mode code command
with mode code
00110
and T/R bit equals 1
Default response: Reset
Message Error (ME) status
then transmit Status Word.
If broadcast, set the
Status Word BCR bit and
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 sets the TF Inhibit bit in the BIT Word register at address 0x0013. While the TF inhibit bit
is set, the device disregards assertion of the Terminal Flag (TF) bit in the 1553 Status Bits register (0x0006) and
only transmits status with the Terminal Flag status bit reset.
Once the Terminal Flag has been inhibited, it can be reactivated by an “Override Inhibit Terminal Flag” MC7 or
“Reset Remote Terminal” MC8 mode command, by software reset (asserting the SRST bit in the RT Configuration
Register) or by asserting the MR master reset input pin.
MC6 EXCEPTIONS:
Invalid command word.
OR
T/R bit equals 0 and
UMCINV bit in the RT
Configuration
Register 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 the RT
Configuration
Register 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 the RT
Configuration
Register 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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