Aim MIL-STD-1553 - Format 1

MIL-STD-1553 Reference Manual
343
Chapter 9 – Bus Monitor Functions
9.1.12.1.2 Format 1
Message Header (MS-Byte always first)
15 8
7 0
Message Status
LEN
Low Milli-Time
High Milli-Time
Micro-Time
Command Word
M
M
e
e
s
s
s
s
a
a
g
g
e
e
S
S
t
t
a
a
t
t
u
u
s
s
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
GERR
0
0
1
PERR
0 (reserved)
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
0 (reserved)
TBUSY
0 (reserved)
GERR Global Error
PERR Parity Error
TBUSY Terminal Busy
L
L
E
E
N
N
Value
Description
1..32
Amount of Data Words following the Message Header
L
L
o
o
w
w
M
M
i
i
l
l
l
l
i
i
-
-
T
T
i
i
m
m
e
e
–
–
M
M
e
e
s
s
s
s
a
a
g
g
e
e
T
T
i
i
m
m
e
e
i
i
n
n
m
m
i
i
l
l
l
l
i
i
-
-
s
s
e
e
c
c
o
o
n
n
d
d
s
s
(
(
L
L
o
o
w
w
W
W
o
o
r
r
d
d
)
)
H
H
i
i
g
g
h
h
M
M
i
i
l
l
l
l
i
i
-
-
T
T
i
i
m
m
e
e
–
–
T
T
i
i
m
m
e
e
i
i
n
n
m
m
i
i
l
l
l
l
i
i
-
-
s
s
e
e
c
c
o
o
n
n
d
d
s
s
(
(
H
H
i
i
g
g
h
h
W
W
o
o
r
r
d
d
)
)
M
M
i
i
c
c
r
r
o
o
-
-
T
T
i
i
m
m
e
e
Value
Description
0..999
Message Time in micro-seconds
C
C
o
o
m
m
m
m
a
a
n
n
d
d
W
W
o
o
r
r
d
d
–
–
C
C
o
o
m
m
m
m
a
a
n
n
d
d
W
W
o
o
r
r
d
d
Message Data (LS-Byte always first)