1553BBC-XX Datasheet, PDF (17/30 Pages) Actel Corporation – Core1553BBC MIL-STD-1553B Bus Controller

Core1553BBC MIL-STD-1553B Bus Controller
Table 16 • Message Block (Continued)
Offset Contents Written by Description
6
TSW
BC
Message Transfer Status Word. Provides status information on the message block. The CPU
should clear this field when setting up the message block
15
Message Okay
'1': Message completed okay with no errors. May have been retried.
'0': Message failed after all retries completed
14
No response from RT
13
RT Signaled Message Error
12
1553B Error occurred, encoding, parity, too many words, etc.
11:9
Number of retry attempts to transmit the message (0-6)
8
Unexpected bit set in the status word
7
Got the RT-to-RT RX status word
6
Got the status word, for RT-to-RT got the TX status word
5:0
Number or data words transmitted or received.
Note: '000000' indicates 0 and '100000' indicates 32
7
Reserved
–
15:0
Not Used
v4.0
17