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參數(shù)資料
| 型號： | 935262056518 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 尋呼電路 |
| 英文描述： | TELECOM, PAGING DECODER, PQFP32 |
| 封裝： | 7 X 7 MM, 1.40 MM HEIGHT, PLASTIC, SOT-358-1, LQFP-32 |
| 文件頁數(shù)： | 52/76頁 |
| 文件大?。?/td> | 301K |
| 代理商： | 935262056518 |
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1999 Apr 12
56
Philips Semiconductors
Product specication
FLEX
roaming decoder II
PCD5013
8.8.3
MESSAGE BUILDING
The PCD5013 sends data from the FLEX
signal to the
host in packets. Data is transmitted one block at a time,
and one phase at a time. For a 2 phase transmission,
information in block 0 phase-A is converted into packets
and sent to the host, then information in block 0 phase-C
is sent to the host followed by information in
block 1 phase-A and then information in block 1 phase-C
etc. Codewords for different calls may therefore be
interleaved, so the host must use the phase and word
number embedded in each packet to associate that packet
with a particular call.
The phase and word number of the vector packet provides
a unique key which allows the host to associate all the data
for a particular call within a frame. The host must then use
information embedded in the vector word to calculate what
message word locations are associated with the vector.
Table 61 FLEX
transmission sequence
Notes
1. Phases begin with BIW1, which is not sent to the host.
2. Codewords not addressed to the pager.
3. Vector for long address indicates the location of the
second and third message words.
4. For long addresses, the first message word
immediately follows the vector.
BLOCK
WORD
PHASE-A
PHASE-C
0
BIW1; note 1
1
addr; note 2
BIW
2
addr; note 2
BIW
3
addr1
addr; note 2
4
addr2
addr; note 2
5
vect; note 2
long addr3 (cw 1)
6
vect; note 2
long addr3 (cw 2)
7
vect1
addr; note 2
1
8
vect2
vect; note 2
9
mess1 (cw 1)
vect; note 2
10
mess1 (cw 2)
vect3; note 3
11
mess1 (cw 3)
mess3 (cw 1);
note 4
12
mess2 (cw 1)
mess; note 2
13
mess2 (cw 2)
mess; note 2
14
mess2 (cw 3)
mess3 (cw 2)
15
mess2 (cw 4)
mess3 (cw 3)
Tables 61 and 62 show an example of receiving three
messages (possibly portions of fragmented or group
messages), and two BIW packets in the first two blocks of
a 2 phase 3200 bps FLEX
frame in case of an
any-phase pager. Table 61 shows the block number, word
number and word content of both phase-A and phase-C
(subscripts indicate the call number). In a 6400 bps
FLEX
frame, there would be four phases: A, B, C and D;
in a 1600 bps signal there would be only phase-A.
Table 62 shows the sequence of packets transmitted to
the host.
Table 62 PCD5013 packet sequence
Notes
1. Word number in an address is that of the
corresponding vector.
2. BIW sent if BIW reception enabled by SBI bit in the
control packet.
PACKET PHASE
PACKET
TYPE
WORD
NO.
COMMENT
1
A
address
7
note 1
2
A
address
8
note 1
3
A
vector
7
pointer to
phase-A
word 9
4
C
BIW
n.a.
note 2
5
C
BIW
n.a.
note 2
6
C
long
address
10
note 1
7
A
vector
8
pointer to
phase-A
word 12
8
A
message
9
mess1 (cw 1)
9
A
message
10
mess1 (cw 2)
10
A
message
11
mess1 (cw 3)
11
A
message
12
mess2 (cw 1)
12
A
message
13
mess2 (cw 2)
13
A
message
14
mess2 (cw 3)
14
A
message
15
mess2 (cw 4)
15
C
vector
10
pointer to
phase-A
word 14
16
C
message
11
mess3 (cw 1)
17
C
message
14
mess3 (cw 2)
18
C
message
15
mess3 (cw 3)
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