參數(shù)資料
型號(hào): 8213AM
英文描述: Telecommunication IC
中文描述: 通信集成電路
文件頁數(shù): 7/33頁
文件大小: 171K
代理商: 8213AM
SM8213AM
NIPPON PRECISION CIRCUITS—7
FUNCTIONAL DESCRIPTION
Unless otherwise specified, values in diagrams with-
out parentheses are for 512 bps, in ( ) are for 1200
bps, and in [ ] are for 2400 bps. “M” represents the
value of PL5 (MSB) to PL0 (LSB), and “N” repre-
sents the value of RF5 (MSB) to RF0 (LSB).
Receive Format
The receive format conforms to CCIR RPC No. 1 (POCSAG).
Sync signal (SC)
The sync signal is a continuous code word in the
received signal, used for word synchronization. It
comprises 31 bits in an M-series bit pattern plus one
even-parity bit, making a 32-bit signal. The sync
code word pattern is shown in table 1.
Figure 1. Receive signal format
Sync Code Part
1 Batch
Frame Part
0
1
2
3
4
5
6
7
1 Code Word
Sync Code Part
SC
SC
7
0
Sync Code Word
1
32
Address bits
Function bits
Check bits
Message bits
1 2
19 20
21 22
31
32
0
1
Even - parity bit
Even - parity bit
Check bits
Address signal
Message signal
1 Frame(= 2 Code Words)
Preamble
1st Batch
2nd Batch
Frame No.
Continuous 575 - bit "1, 0" bit pattern
Sync
Code
Sync
Code
Table 1. Sync code format
Bit number
Bit value
Bit number
Bit value
Bit number
Bit value
Bit number
Bit value
1
0
9
1
17
0
25
1
2
1
10
1
18
0
26
1
3
1
11
0
19
0
27
0
4
1
12
1
20
1
28
1
5
1
13
0
21
0
29
1
6
1
14
0
22
1
30
0
7
0
15
1
23
0
31
0
8
0
16
0
24
1
32
0
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