hi-6131pqtf QuickLogic Corp, hi-6131pqtf Datasheet - Page 75

• Manufacturer Part Number: hi-6131pqtf
• Description: Mil-std-1553 / Mil-std-1760 3.3v Bc / Mt / Rt Multi-terminal Device
• Manufacturer: QuickLogic Corp

Bit No.
7
Mnemonic
MENDV
(continued)
R/W
R/W
Reset
0
HOLT INTEGRATED CIRCUITS
Function
The only 3 cases when an RT transmits Message Error status onto the
bus:
1. An RT using “illegal command detection” receives an illegal command
2. An RT receives a “transmit status” mode command (MC2). The
3. An RT receives a “transmit last command” mode command (MC18
In summary, Message Error status never occurs with more
than one data word, and only occurs with one data word for the
“transmit last command” mode code.
Besides illegal command detection, there is just one situation where
Message Error status occurs, but Status transmission is suppressed:
The RT detects a valid receive command having correct RT address,
but an invalid word is detected in the accompanying data words, or a
gap occurs between words. In this situation, Message Error status
is set but the RT suppresses its Status Word transmission. This
suppressed ME status is only seen by the BC if retrieved by a following
“transmit status’’ or “transmit last command” mode command.
•
If MEMASK = 0 in
Wrong number of
BC Control Word
HI-6130, HI-6131
that otherwise meets all other validation requirements. The RT
responds with Status Word only, with Message Error bit set. No data
words are sent.
previous valid command for the RT had Message Error status. The
RT responds with Status Word only, with Message Error bit set.
data words are sent.
decimal). The previous valid command for the RT set Message Error
status. The RT responds with Status Word (with Message Error bit
set) and one data word, the previous Command Word.
data words
Condition
If the RT responds Message Error status to a transmit command
with the wrong number of data words (not 0), here is the message
result:
75
(MSTATSET) bit = 1.
Block Status Word Condition Code Register
Masked Status Set
(STATSET) bit = 1.
Format Error (FE)
Word Count Error
(LE) bit = 1.
Status Set
bit = 1
Bad Message (BADMSG)
Format Error (FMTERR)
(MSTATSET) bit = 1.
Masked Status Set
----------
bit = 1
bit = 1
No