
Data Device Corporation
62743_pre7_noSA-DB.DOC
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8-07-02
34
TABLE 50. 1553B STATUS WORD
BIT
DESCRIPTION
15(MSB)
REMOTE TERMINAL ADDRESS BIT 4
14
REMOTE TERMINAL ADDRESS BIT 3
13
REMOTE TERMINAL ADDRESS BIT 2
12
REMOTE TERMINAL ADDRESS BIT 1
11
REMOTE TERMINAL ADDRESS BIT 0
10
MESSAGE ERROR
9
INSTRUMENTATION
8
SERVICE REQUEST
7
RESERVED
6
RESERVED
5
RESERVED
4
BROADCAST COMMAND RECEIVED
3
BUSY
2
SUBSYSTEM FLAG
1
DYNAMIC BUS CONTROL ACCEPTANCE
0(LSB)
TERMINAL FLAG
TABLE 51. RT/MONITOR INTERRUPT STATUS WORD
(FOR INTERRUPT STATUS QUEUE)
BIT
DEFINITION FOR MESSAGE INTERRUPT
EVENT
DEFINITION FOR NON-MESSAGE
INTERRUPT EVENT
15
TRANSMITTER TIMEOUT
NOT USED
14
ILLEGAL COMMAND
NOT USED
13
MONITOR DATA STACK 50% ROLLOVER
NOT USED
12
MONITOR DATA STACK ROLLOVER
NOT USED
11
RT CIRCULAR BUFFER 50% ROLLOVER
NOT USED
10
RT CIRCULAR BUFFER ROLLOVER
NOT USED
9
MONITOR COMMAND (DESCRIPTOR) STACK
50% ROLLOVER
NOT USED
8
MONITOR COMMAND (DESCRIPTOR) STACK
ROLLOVER
NOT USED
7
RT COMMAND (DESCRIPTOR) STACK 50%
ROLLOVER
NOT USED
6
RT COMMAND (DESCRIPTOR) STACK
ROLLOVER
NOT USED
5
HANDSHAKE FAIL
NOT USED
4
FORMAT ERROR
TIME TAG ROLLOVER
3
MODE CODE INTERRUPT
RT ADDRESS PARITY ERROR
2
SUBADDRESS CONTROL WORD EOM
NOT USED
1
END-OF-MESSAGE (EOM)
RAM PARITY ERROR
0
“1” FOR MESSAGE INTERRUPT EVENT;
“0” FOR NON-MESSAGE INTERRUPT EVENT