MIL-STD-1553 Reference Manual
Chapter 9 – Bus Monitor Functions
Next Trigger Control Block Index on EOM (End of Message) (if this trigger control block
condition is not met for this transfer.)
disabled for Static Trigger
disabled for Static Trigger
Sequence Trigger 0/1 modified
do not modify Sequence Trigger 0/1
Sequence Trigger 0/1 modified
do not modify Sequence Trigger 0/1
A
A
i
i
U
U
I
I
n
n
t
t
8
8
p
p
a
a
d
d
d
d
i
i
n
n
g
g
1
1
0 (reserved)
Trigger Data Word
The usage of this Word depends on the selected Trigger Type (tt)
E
E
R
R
R
R
I
I
f
f
B
B
i
i
t
t
=
=
1
1
:
:
A
A
n
n
y
y
E
E
r
r
r
r
o
o
r
r
A
A
L
L
T
T
E
E
R
R
I
I
f
f
B
B
i
i
t
t
=
=
1
1
:
:
A
A
l
l
t
t
e
e
r
r
n
n
a
a
t
t
e
e
B
B
u
u
s
s
R
R
e
e
s
s
p
p
o
o
n
n
s
s
e
e
E
E
r
r
r
r
o
o
r
r
L
L
C
C
N
N
T
T
I
I
f
f
B
B
i
i
t
t
=
=
1
1
:
:
L
L
o
o
w
w
W
W
o
o
r
r
d
d
c
c
o
o
u
u
n
n
t
t
E
E
r
r
r
r
o
o
r
r
H
H
C
C
N
N
T
T
I
I
f
f
B
B
i
i
t
t
=
=
1
1
:
:
H
H
i
i
g
g
h
h
W
W
o
o
r
r
d
d
c
c
o
o
u
u
n
n
t
t
E
E
r
r
r
r
o
o
r
r
S
S
T
T
A
A
T
T
I
I
f
f
B
B
i
i
t
t
=
=
1
1
:
:
S
S
t
t
a
a
t
t
u
u
s
s
W
W
o
o
r
r
d
d
E
E
x
x
c
c
e
e
p
p
t
t
i
i
o
o
n
n
E
E
r
r
r
r
o
o
r
r
T
T
A
A
D
D
D
D
R
R
I
I
f
f
B
B
i
i
t
t
=
=
1
1
:
:
T
T
e
e
r
r
m
m
i
i
n
n
a
a
l
l
A
A
d
d
d
d
r
r
e
e
s
s
s
s
E
E
r
r
r
r
o
o
r
r
G
G
A
A
P
P
I
I
f
f
B
B
i
i
t
t
=
=
1
1
:
:
E
E
a
a
r
r
l
l
y
y
R
R
e
e
s
s
p
p
o
o
n
n
s
s
e
e
o
o
r
r
G
G
a
a
p
p
t
t
o
o
o
o
A
A
i
i
I
I
n
n
t
t
1
1
6
6
I
I
L
L
L
L
E
E
G
G
L
L
I
I
f
f
B
B
i
i
t
t
=
=
1
1
:
:
I
I
l
l
l
l
e
e
g
g
a
a
l
l
C
C
o
o
m
m
m
m
a
a
n
n
d
d
W
W
o
o
r
r
d
d
T
T
X
X
I
I
f
f
B
B
i
i
t
t
=
=
1
1
:
:
T
T
r
r
a
a
n
n
s
s
m
m
i
i
s
s
s
s
i
i
o
o
n
n
o
o
n
n
b
b
o
o
t
t
h
h
M
M
I
I
L
L
b
b
u
u
s
s
c
c
h
h
a
a
n
n
n
n
e
e
l
l
s
s
I
I
W
W
G
G
A
A
P
P
I
I
f
f
B
B
i
i
t
t
=
=
1
1
:
:
I
I
n
n
t
t
e
e
r
r
w
w
o
o
r
r
d
d
G
G
a
a
p
p
E
E
r
r
r
r
o
o
r
r
I
I
S
S
Y
Y
N
N
C
C
I
I
f
f
B
B
i
i
t
t
=
=
1
1
:
:
I
I
n
n
v
v
e
e
r
r
t
t
e
e
d
d
S
S
y
y
n
n
c
c
E
E
r
r
r
r
o
o
r
r
P
P
A
A
R
R
I
I
f
f
B
B
i
i
t
t
=
=
1
1
:
:
P
P
a
a
r
r
i
i
t
t
y
y
E
E
r
r
r
r
o
o
r
r
L
L
B
B
I
I
T
T
I
I
f
f
B
B
i
i
t
t
=
=
1
1
:
:
L
L
o
o
w
w
B
B
i
i
t
t
C
C
o
o
u
u
n
n
t
t
E
E
r
r
r
r
o
o
r
r
H
H
B
B
I
I
T
T
I
I
f
f
B
B
i
i
t
t
=
=
1
1
:
:
H
H
i
i
g
g
h
h
B
B
i
i
t
t
C
C
o
o
u
u
n
n
t
t
E
E
r
r
r
r
o
o
r
r
M
M
A
A
N
N
C
C
H
H
I
I
f
f
B
B
i
i
t
t
=
=
1
1
:
:
M
M
a
a
n
n
c
c
h
h
e
e
s
s
t
t
e
e
r
r
C
C
o
o
d
d
i
i
n
n
g
g
E
E
r
r
r
r
o
o
r
r
N
N
R
R
E
E
S
S
P
P
I
I
f
f
B
B
i
i
t
t
=
=
1
1
:
:
T
T
e
e
r
r
m
m
i
i
n
n
a
a
l
l
N
N
o
o
R
R
e
e
s
s
p
p
o
o
n
n
s
s
e
e
E
E
r
r
r
r
o
o
r
r
W
W
O
O
R
R
D
D
D
D
a
a
t
t
a
a
/
/
C
C
o
o
m
m
m
m
a
a
n
n
d
d
/
/
S
S
t
t
a
a
t
t
u
u
s
s
W
W
o
o
r
r
d
d
t
t
o
o
t
t
r
r
i
i
g
g
g
g
e
e
r
r
o
o
n
n
A
A
i
i
U
U
I
I
n
n
t
t
1
1
6
6
t
t
m
m
w
w
Trigger Mask Word
The usage of this Word depends on the selected Trigger Type (tt).
Used to define which bits of the received data/Command/Status
Word are relevant for the Trigger condition check
Used to define which bits of the received Data Word are
relevant for the Trigger condition check