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參數資料
| 型號： | W93910 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 尋呼電路 |
| 英文描述： | ERMES(Enhanced Radio Emessage System) Paging Protcol Decoder(增強的無線電子信息系統尋呼解碼器) |
| 中文描述： | TELECOM, PAGING DECODER, PDSO28 |
| 封裝： | SSOP-28 |
| 文件頁數： | 12/35頁 |
| 文件大小： | 267K |
| 代理商： | W93910 |
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W93910
- 12 -
The frequency channel adjustment is implemented by XCNCG, PLEN, and
μ
C. XCNCG is used to
output a high pulse to inform
μ
C of the frequency channel increment request.
μ
C needs to count the
XCNCG high pulse during the PLEN active period. Each XCNCG pulse indicates one frequency channel
increment. During the PLEN inactive period, the
μ
C should program the synthesizer with suitable data
based on the previous XCNCG counting result to ensure the receiver can catch the right channel.
During the lock mode, the pager will fix at the same channel as shown in Figure 6 and 7. The normal
mode operation is described in Figure 8 and 9. The batch number setting is shown in Table 8.
OPTION BIT
FUNCTION
bn3
bn0
0000
Batch Number
A
0001
B
0010
C
0011
D
0100
E
0101
F
0110
G
0111
H
1000
I
1001
J
1010
K
1011
L
1100
M
1101
N
1110
O
1111
P
Table 8. bn3
bn0 batch number format
IDLE MODE
If there is no meaningful signal after scanning the channel several times, the decoder will enter idle
mode to save power, and will re-enter the channel scan mode after a period of time.
SYNC MODE
While synchronizing with the paging system, the decoder enters sync mode and the SYNVAL pin
outputs LOW The decoder will then change to lock mode or normal mode based on the receiving
information.
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