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HD6433937 Datasheet, PDF (375/521 Pages) Hitachi Semiconductor – Hardware Manual
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2. Short Message / Tone Only Vector
Table 12-22 Short Message / Tone Only Vector Packet Bit Assignments
Byte 3
Byte 2
Byte 1
Byte 0
Bit 7
0
e
x
d5
Bit 6
WN 6
p1
x
d4
Bit 5
WN5
p0
d11
d3
Bit 4
WN4
x
d10
d2
Bit 3
WN3
x
d9
d1
Bit 2
WN 2
V2
d8
d0
Bit 1
WN1
V1
d7
t1
Bit 0
WN 0
V0
d6
t0
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.
t1 t0 d1 1 d10 d9 d8 d7 d6 d5 d4 d3 d2 d1 d0 Description
0 0 c3 c2 c1 c0 b3 b2 b1 b0 a3 a2 a1 a0 Short Numeric: 3 numeric chars*1 when on a
messaging address
0 0 T3 T2 T1 T0 M2 M1 M0 A4 A3 A2 A1 A0 Part of NID when on a Network Address
0 1 s8 s7 s6 s5 s4 s3 s2 s1 s0 S2 S1 S0 Tone Only: 8 sources (S) and 9 unused bits
(s)
1 0 s1 s0 R0 N5 N4 N3 N2 N1 N0 S2 S1 S0 Tone Only: 8 sources (S), message number
(N), message retrieval flag (R), and 2 unused
bits (s)
11
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.
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