hi-6131pqtf QuickLogic Corp, hi-6131pqtf Datasheet - Page 183

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

20.1. Subaddress Message Information Words
20.1.1. Receive Subaddress Command
For receive subaddress commands, the device stores the received data words plus two additional words. The device
adds a receive subaddress Message Information Word and a Time-Tag Word to the received data words. The device
stores the Message Information and Time-Tag words ahead of the data words associated with the receive command,
as shown below. If message error occurs, the RT stores only the receive subaddress Message Information Word and
Time-Tag Word. Once a message error is detected, the device sets the MERR bit in the receive subaddress Message
Information word. When this occurs, all data words are considered invalid. Whenever the receive subaddress Mes-
sage Information Word MERR bit is set, the host should disregard the record’s data word(s).
Here is an example data structure for a 3-word receive command. Notice that the receive subaddress Data Pointer
points to the data structure starting address, not the first data word. The data pointer is located in the receive subad-
dress command’s Descriptor Block, fully described later:
Data pointer equals 0x0500 → 0x0500
Ping-Pong
Circular 1
Circular 2
Indexed
Buffer
Mode
One. Host defines
size for N messages
Two 34-word buffers,
one message each
One. Host defines
size for N words
One. Host defines
size for N messages,
plus Msg Info Block
Number and Size
Data Buffer(s)
Hex Address
Data Buffer
Table 15. Summary of Data Buffer Modes.
0x0501
0x0502
0x0503
0x0504
Stored in same
buffer as data
Stored in same
buffer as data
Stored in same
buffer as data
Stored in
separate buffer
(Msg info block)
Message Info
HOLT INTEGRATED CIRCUITS
Word
HI-6130, HI-6131
Word Description
Message Information Word
Time-Tag Word
Data Word 1
Data Word 2
Data Word 3
Yes, only single
message mode
183
Mode Codes?
Suitable for
Yes
No
No
For transacting N (multiple) messages
with optional host interrupt when done
For transacting single messages,
alternating between A and B buffers
For transacting messages until buffer is
full / empty, optional interrupt when done
For transacting N (multiple) messages
with optional host interrupt when done.
Data buffer holds contiguous pure data.
Device Writes Word ...
After message completion
After message completion (See Note)
Note: The data words are written
after message completion when
Configuration Register 2 TRXDB is 1,
otherwise written when received.
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