hi-6131pqtf QuickLogic Corp, hi-6131pqtf Datasheet - Page 92

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

When MT Configuration Register bits 1-0 equal 01, the Simple Message Monitor operates with 48-bit Time Tag
resolution. Each MIL-STD-1553 message adds an 8-word entry in the Command Stack. This is summarized in Table
9. The expanded message block accommodates two additional Time Tag words, a Message Length word and a
Response Time word not found when using 16-bit Time tag resolution.
Message
Word
Block
Word 1
Word 0
Message
Word
Block
Word 7
Word 6
Word 5
Word 4
Word 3
Table 9. Command Stack Message Block for SMT Monitor using 48-bit Time Tag
Word Name Word Function when using 16-bit time tag
Message
Time Stamp
Bits 15 ~ 0
Block Status
Word
Word Name Word Function when using 16-bit time tag
Message
Command
Word
Data Block
Pointer
Message
Length Word
(bytes)
Response
Time Word
Block Status
Word
Sixteen bit message time stamp.
Word 0 is the first word in the Command Stack entry for each message.
Message Block Status Word, defined in Section 12.2.
Word 0 is the first word in the Command Stack entry for each message.
Message Command Word.
The MIL-STD-1553 Command Word that initiated the message.
For an RT-RT message, Receive Command Word 1 is stored here; Transmit Command
Word 2 is the first stored word in the Message Data Block.
Starting address in the Data Stack for the corresponding message data block.
The Message Length Word indicates the number of bytes stored in the Message Data
Block. The range is 0 to 72 bytes, corresponding to 0 to 36 16-bit words stored.
The Response Time Word contains two 8-bit fields:
All GAP values are measured from mid-parity zero crossing of the preceding word, to
the mid-sync zero crossing of the Status Word (the gap “dead time” interval plus 2 µs).
Time resolution is 100 ns per LSB, so the maximum indicated gap time for GAP1 or
GAP2 is 25.5 µs.
For RT-RT messages, the GAP1 byte indicates transmit RT response time, and the
GAP2 byte indicates received RT response time.
For all other messages, the GAP1 byte indicates the only RT response time, and the
GAP2 byte reads 0x00.
Message Block Status Word, defined in Section 12.2.
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•
Bits 15 ~ 8 contains GAP2
Bits 7 ~ 0 contains GAP1
HOLT INTEGRATED CIRCUITS
HI-6130, HI-6131
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