hi-6131pqtf QuickLogic Corp, hi-6131pqtf Datasheet - Page 189

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

Three transmit mode commands with data are not defined under MIL-STD-1553B. These are MC17, MC20 and MC21
(mode codes 0x11, 0x14 and 0x15 respectively). However the device responds “in form” if illegal command detection
is not used (corresponding bits in Illegalization Table are logic 0) and the UMCINV bit in Configuration Register 1 is
logic 0.
For mode code commands without data, the data structure contains only the Message Information Word and Time-Tag
Word. Here is an example data structure for a transmit mode command without data (mode code values 0x00 through
0x0F). Again, the data pointer points to the data structure starting address. The data pointer is located in the transmit
mode command’s Descriptor Block, fully described later:
The following bits comprise the mode transmit Message Information Word:
Data pointer equals 0x0500 → 0x0500
Data pointer equals 0x0500 → 0x0500
MSB
Bit No.
15,14
13
12
10
11
9
15 14 13 12 11 10 9
X
X
Mnemonic
-----
GAPERR
WCTERR
-----
MERR
WASBSY
X
Function
Not Used.
Gap Error.
This bit is high when bus activity was detected immediately after the mode command
word, when a gap was expected.
Word Count Error
This bit is asserted if command is received with unexpected data word(s).
Not Used.
Message Error.
This bit is asserted when message error status change occurs during command process-
ing. See bits 12-13 for details.
Was Busy Status.
This bit is asserted when the terminal responds to the mode command with BUSY status,
due to global BUSY bit set in 1553 Status Bits Register, or command-specific MKBUSY bit
set in the descriptor table Control Word. No mode data word was transmitted.
8
Hex Address
Hex Address
Data Buffer
Data Buffer
X
7
0x0501
0x0502
0x0501
X
6
5
HOLT INTEGRATED CIRCUITS
4
HI-6130, HI-6131
3
Word Description
Message Information Word
Time-Tag Word
Mode Data Word
Word Description
Message Information Word
Time-Tag Word
2
1
0
189
LSB
Word is Written By ...
Device, after message completion
Host, prior to terminal’s data transmit
(except MC18, MC19 are written by
the device after completion)
Word is Written By ...
Device, after message completion
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