hi-6131pqtf QuickLogic Corp, hi-6131pqtf Datasheet - Page 66

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

10.4.2. Time to Next Message Word
The HI-613x Bus Controller provides a programmable delay for Time to Next Message. This word in the Message
Control / Status Block specifies the delay from the start of this message, to the start of the next message. The delay is
programmable with 1 µs per LSB resolution, and has a maximum value of 65.535 milliseconds.
When the specified Time to Next Message value is less than the actual time required to transact the current message,
the next message starts immediately upon completion current message, after the minimum inter-message gap time of
4µs. This gap corresponds to a bus “dead time” of 2µs.
10.4.3. Data Block Pointer
The Data Block Pointer in the Message Control / Status Block provides the starting address in RAM for storage of
message data words or mode code data. For BC-to-RT (receive) commands, this pointer contains the RAM location
for the first data word transmitted by the BC.
For RT-to-BC (transmit) commands or RT-to-RT commands, this pointer contains the RAM location for storing the first
data word transmitted by the RT (and received by the BC).
Bit No. Mnemonic
2
1
0
MCODFMT
BCSTFMT
RTRTFMT
R/W Reset Function
R/W
0
Mode Code Message Format.
Broadcast Message Format.
RT to RT Message Format.
The combination of these three Message Format bits selects the MIL-STD-
1553B message type:
* Transmit / Receive bit in Command Word
Note: Bit 0 must be logic 1 for RT-RT messages. This is the single control
point enabling the 16-word Control Block that configures RT-RT messages.
Code Bit 2
HOLT INTEGRATED CIRCUITS
Mode
0
0
0
0
1
1
1
1
HI-6130, HI-6131
Broadcast
Bit 1
66
0
0
1
1
0
0
1
1
RT-RT
Bit 0
0
1
0
1
0
1
0
1
Message Type
BC-to-RT if the T/R bit * equals logic 0
RT-to-BC if the T/R bit * equals logic 1
RT-to-RT
Broadcast BC-to-RT
Broadcast RT-to-RT
Mode Code Command
Do Not Use
Broadcast Mode Code Command
Do Not Use