hi-6131pqtf QuickLogic Corp, hi-6131pqtf Datasheet - Page 186

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

20.2. Mode Command Message Information Words
Mode command data structures in shared RAM are similar to those for subaddresses. Mode codes 0 through 15
(0x0F) do not have an associated data word, so data structures for these mode code values have just a Message
Information Word and Time-Tag Word. The Message Information Word is stored at the memory address specified by
the descriptor table Data Pointer. Mode codes 16 through 31 (0x10 through 0x1F) have one associated data word.
The Message Information Word is stored at the memory address specified by the descriptor table Data Pointer, and
the Time-Tag Word is stored in the following location. The data word is stored at the memory address specified by the
Data Pointer plus two locations.
20.2.1. Receive Mode Command
The receive mode command data structure contains a Message Information Word, a Time-Tag Word and may con-
tain one Data Word. If a receive mode command has a data word, the device may apply the data as defined by MIL-
STD-1553, plus store the received single mode data word at the address specified by the Data Pointer, plus two
Bit No.
15,14
4-0
13
12
10
11
9
8
7
6
5
Mnemonic
-----
GAPERR
WCTERR
-----
MERR
WASBSY
ILCMD
-----
RTRT
BUSID
WC4:0
Function
Not Used.
Gap Error.
Assertion of this bit indicates bus activity was detected immediately after the transmit com-
mand 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 and 13 for details.
Was Busy Status.
This bit is asserted when the terminal responds to the transmit command with BUSY
status, due to global BUSY bit set in 1553 Status Bits Register, or command-specific MK-
BUSY bit set in the descriptor table Control Word. No data words were transmitted.
Illegal Command Received.
This bit is asserted when the Illegalization Table bit corresponding to the received com-
mand equals one. The Illegalization Table should only contain nonzero values when “il-
legal command detection” is being applied. See Section 19.2 for further information.
Not Used.
Remote Terminal to Remote Terminal Transfer.
Assertion of this bit indicates the transmit command was an error-free RT-to-RT transfer.
Bus Identification.
If this bit equals zero, message was transacted on Bus A. If bit equals one, it was trans-
acted on Bus B.
Word Count.
This 5-bit field contains the word count extracted from the command word. Zero indicates
32 words.
HOLT INTEGRATED CIRCUITS
HI-6130, HI-6131
186