HI-6130_16 Datasheet, PDF (103/296 Pages) Holt Integrated Circuits – 3.3V BC / MT / RT Multi-Terminal Device

HI-6130, HI-6131
Bit No. Mnemonic
7
DSR
6
SFS
5
LE
4
SE
3
WE
2
RRGSA
1
RRCW2
R/W Reset Function
Data Buffer Rollover
R/W 0 ^{Bit 7 is logic 1 to indicate that this message overran the monitor Data}
Buffer end address, causing the storage pointer to roll over to the base
address.
Status Flag Set
R/W 0
Bit 6 is logic 1 when a status bit was set in an RT Status Word response.
Word Count (Length) Error
Bit 5 indicates that the number of data words transmitted by the BC or
R/W 0 ^{RT differs from the Word Count specified in the Command Word. An RT}
Status Word with the Busy bit set will not cause Word Count Error. A
transmit command with Response Timeout will not cause Word Count
Error.
Sync Type Error
Bit 4 is logic 1 to indicate that a BC transmitted data sync with a
R/W 0 _{Command Word, or a command / status sync occurred with Data Word,}
or an RT responded with data sync in its Status Word and/or command/
status sync in a Data Word.
Invalid Word Error (WE)
R/W 0 ^{Bit 3 is logic 1 indicate on invalid word error occurred. This includes}
Manchester decoding errors in the sync pattern or word bits, or the
wrong number of bits in the word, or parity error.
RT-to-RT Gap/Sync/Address Error (RRGSA)
Bit 2 is logic 1 if one or more of the following RT-RT message conditions
occur:
R/W 0
• MT Gap Check is enabled (bit 12 equals 1 in register 0x0029) and
an RT Status Word is received having a response time less than
4µs, per MIL-STD-1553B (mid-parity to mid-sync). In other words,
the bus “dead time” was less than 2µs.
• One of the RTs responds with an invalid Status Word, having a sync
error, a Manchester encoding error, bit count error and/or parity error
• One of the RT Status Words contains an RT Address that differs
from the RT Address in the corresponding Command Word.
RT-to-RT Command Word 2 Error (RRCW2)
Bit 1 is logic 1 if an RT-to-RT message occurs (two contiguous
Command Words) with one or more of the following illogical conditions:
R/W 0
• Transmit Command Word 2 T/R bit equals 0 (receive)
• Transmit Command Word 2 subaddress field equals 00000 or 11111
(mode command indicated)
• Transmit Command Word 2 has the same RT Address as Receive
Command Word 1
• Transmit Command Word 2 has sync error
HOLT INTEGRATED CIRCUITS
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