HI-6120 HOLTIC [Holt Integrated Circuits], HI-6120 Datasheet - Page 128
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HI-6120
Manufacturer Part Number
HI-6120
Description
MIL-STD-1553 Remote Terminal ICs
Manufacturer
HOLTIC [Holt Integrated Circuits]
Datasheet
1.HI-6120.pdf
(157 pages)
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* 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
TRANSMITTER
SHUTDOWN (MC4):
Mode code command
with mode code
00100
and T/R bit equals 1
The device automatically shuts down either transmit and receive or transmit only for the inactive bus,
depending on the state of the SDSEL bit in Configuration Register 2. (See description of SDSEL and MCOPT4
bits in Configuration Register 2 for further information. When a bus transmitter (or transmitter and receiver) is
shut down by mode command, bus status is reflected by assertion of a TXASD or TXBSD bit in the Built-In Test
Register at register address 0x0014. If SDSEL equals logic 0, an RXASD or RXBSD bit will also be asserted.
See Built-In Test Register description for further information. Once shutdown, the inactive bus transmitter (or
transmitter and receiver can only be reactivated by an “Override Transmitter Shutdown” MC5 or MC21 or “Reset
Remote Terminal” MC8 mode code command, or by software reset (by setting the SRST bit in Configuration
Register 1) or by hardware reset initiated by asserting the MR master reset input pin.
MC4 EXCEPTIONS:
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: Reset
Message Error (ME) status
then transmit Status Word. If
broadcast, set Status Word
BCR bit and suppress status.
transmit. After Status trans-
mission, inhibit the inactive bus:
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.
HOLT INTEGRATED CIRCUITS
HI-6120, HI-6121
128
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.
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.
(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
IBR
None
IWA
IBR
ILCMD
IWA
IBR
MERR
IWA
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