hi-6131pqtf QuickLogic Corp, hi-6131pqtf Datasheet - Page 99

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

12.3. SMT Message Filter Table
The Simple Monitor Terminal can select messages for monitoring through the use of a 128-word MT Filter Table,
located at fixed RAM address 0x0100. When the table bit corresponding to a new message Command Word is logic
1, that message is ignored by the monitor. If the table bit is logic 0, that message is recorded.
After MR master reset, 100% of MIL-STD-1553 messages are monitored, since the entire table address range 0x0100
through 0x017F inclusive is 0x0000. The result is that every valid Command Word, received on an idle bus, marks the
start of a new MIL-STD-1553 message recorded by the monitor. The Message Filter Table is addressed using three
fields in the received Command Word: the 5-bit RT Address field, the T/R Transmit/Receive bit, and the MSB of the
5-bit Subaddress field. This is illustrated in Figure 7.
Bit No.
0
Figure 7. Deriving the Monitor Filter Table Address from the Received Command Word
Mnemonic
CWCE
0
0
R/W
R/W
Bit Fields Comprising Each Received Command Word
0
0
0
Reset
Command
0
0
Sync
0 1
HOLT INTEGRATED CIRCUITS
Function
Command Word Content Error (CWCE)
Bit 0 is logic 1 if a received Command Word violates one or more MIL-
STD-1553B requirements:
•
•
•
0
HI-6130, HI-6131
A non-mode broadcast transmit Command Word occurred. (non-
mode has 5-bit subaddress field equal to decimal 1~30)
A receive mode code Command Word was received with mode code
in the range of 0~15 decimal (undefined)
A broadcast transmit mode code command occurred having a mode
code value for which broadcast is not allowed (mode code = decimal
0, 2, 16, 18 or 19)
Terminal
Address
TA4:0
99
T/
Bit
R
Subaddress
SA4:0
Filter Table
Address
(Mode Code)
Word Count
WC4:0
P