Hitachi H8/3935, Hardware Manual

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363
2. Short Message / Tone Only Vector
Table 12-22 Short Message / Tone Only Vector Packet Bit Assignments
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Byte 3 0 WN
6
WN
5
WN
4
WN
3
WN
2
WN
1
WN
0
Byte 2 e p
1
p
0
x x V
2
V
1
V
0
Byte 1 x x d
11
d
10
d
9
d
8
d
7
d
6
Byte 0 d
5
d
4
d
3
d
2
d
1
d
0
t
1
t
0
V: 010 for a Short Message / Tone Only Vector
WN: Word number of vector (2 - 87 decimal). Describes the location of the vector word in the
frame.
e: Set if more than 2 bit errors are detected in the word or, if after error correction, the check
character calculation fails.
p: Phase on which the vector was found (0=a, 1=b, 2=c, 3=d)
d: Data bits whose definition depend on the value of t in this packet according to the following
table. Note that if this vector is received on a long address and the e bit in this packet is not set, the
decoder will send a Message Packet from the word location immediately following the Vector
Packet. Except for the short message on a non-network address (t=0), all message bits in the
Message Packet are unused and should be ignored.
t
1
t
0
d
1 1
d
10
d
9
d
8
d
7
d
6
d
5
d
4
d
3
d
2
d
1
d
0
Description
0 0 c
3
c
2
c
1
c
0
b
3
b
2
b
1
b
0
a
3
a
2
a
1
a
0
Short Numeric: 3 numeric chars
*
1
when on a
messaging address
0 0 T
3
T
2
T
1
T
0
M
2
M
1
M
0
A
4
A
3
A
2
A
1
A
0
Part of NID when on a Network Address
0 1 s
8
s
7
s
6
s
5
s
4
s
3
s
2
s
1
s
0
S
2
S
1
S
0
Tone Only: 8 sources (S) and 9 unused bits
(s)
1 0 s
1
s
0
R
0
N
5
N
4
N
3
N
2
N
1
N
0
S
2
S
1
S
0
Tone Only: 8 sources (S), message number
(N), message retrieval flag (R), and 2 unused
bits (s)
1 1 spare message type
Note: For long addresses, an extra 5 characters are sent in the Message Packet immediately
following the Vector Packet.
t: Message type. These bits define the meaning of the d bits in this packet.
x: Unused bits. The value of these bits is not guaranteed.