HI-6138_16 Datasheet, PDF (237/254 Pages) Holt Integrated Circuits – Compact Multi-Terminal Device with SPI Host Interface

HI-6138
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
SYNCHRONIZE WITH
DATA WORD (MC17):
Mode code command
with mode code
10001
and T/R bit equals 1
Default response: Reset
Message Error (ME)
status. and transmit
Status Word. If broadcast,
set BCR status bit and
suppress Status response.
Normal CS update:
DBAC bit reset.
BCAST bit reset.
DPB bit toggles.
BUSID bit updated.
MERR bit reset.
ILCMD bit reset.
RTRT bit reset.
IWA
(All error bits reset.)
Device stores received data word in the assigned ping-pong or index data buffer (or in Descriptor Word 4 for
SMCP Simplified Mode Command Processing). “Remote Terminal Configuration Register (0x0017)” MCOPT2
and MCOPT3 bits allow automatic Time-Tag count loading using the data word received. If MCOPT2 equals
1, the received data word is automatically loaded to the Time-Tag counter if the low order bit of the received
data word (bit 0 equals 0. If MCOPT3 equals 1, the received data word is automatically loaded to the Time-Tag
counter if the low order bit of the received data word (bit 0) equals 1. If both bits are set, the received data word
is unconditionally loaded into the Time-Tag counter. For non-broadcast commands, counter load occurs before
status word transmission.
MC17 EXCEPTIONS:
Invalid command word.
OR
T/R bit equals 0 and
UMCINV bit in the RT
Config. Reg.
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
Config. Reg. 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
Config. Reg. equals 0.
The Illegalization Table
bit equals 1 **
No Status Word transmit.
Set the Message Error
(ME) status bit.
If broadcast, set the
BCR status bit.
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 not followed by a
contiguous data word
(missing data word)
No Status Word transmit.
Set the Message Error
(ME) status bit. If broadcast,
set the BCR 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
IBR
Mode code command
word followed by data
word with Manchester
encoding or parity error
(bad data word)
No Status Word transmit.
Set the Message Error
(ME) status bit.
If broadcast, set the
BCR status bit.
DBAC bit set.
BCAST bit
updated.
DPB bit toggles.
MERR bit set.
IWDERR bit set.
BUSID bit updated.
ILCMD bit reset.
RTRT bit reset.
(Other error bits reset.)
MERR
IWA
IBR
* Command is illegal but terminal is not using “illegal command detection” (in form response).
HOLT INTEGRATED CIRCUITS
237