HI-6130_16 Datasheet, PDF (256/296 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
DYNAMIC BUS
CONTROL (MC0):
Mode code command
with mode code
00000 and T/R bit
equals 1
HI-6130 is not equipped to
accept bus control duties. The
host must initialize device to
respond using either of the two
following methods:
The mode code’s bit
in Illegalization Table
equals 0 *
OR
The mode code’s bit
in Illegalization Table
equals 1 **
RT is not using “illegal
command detection.”
Respond “in form”: Reset
Message Error (ME) status
and transmit Status Word.
OR
RT is using “illegal
command detection”and
mode code is illegalized.
Set Message Error (ME)
status and transmit Status
Word.
DBAC bit set. Normal CS update:
IWA
BCAST bit reset. BUSID bit updated.
DPB bit toggles. MERR bit reset.
ILCMD bit reset.
RTRT bit reset.
(All error bits reset.)
DBAC bit set.
BCAST bit reset.
DPB bit toggles.
ILCMD bit set.
BUSID bit updated.
MERR bit reset.
RTRT bit reset.
(Other error bits reset.)
ILCMD
IWA
MC0 EXCEPTIONS:
Broadcast address
RT31 (broadcast not
allowed)
No Status Word transmit.
Set the Message Error
(ME) and BCR status bits.
DBAC bit set.
BCAST bit set.
DPB toggles.
MERR bit set.
BUSID bit updated.
ILCMD bit reset.
RTRT bit reset.
(Other error bits reset.)
MERR
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, RTRT bits
reset.
(Other error bits reset.)
MERR
IWA
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.
(MC0 is not ndefined
when T/R bit equals 0)
No Change
No Message Info
Word is written
None
* 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”.
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