W93910 Datasheet, PDF (13/35 Pages) Winbond – ERMES PAGING DECODER

W93910
LOCK MODE
In lock mode, the decoder will stay at the same channel. If matching addresses appear, all the available
paging messages will be received until messages are finished or time out occurs.
PLEN
receiving message
no message
Figure 6. Lock Mode
Status
ON
PLEN
XCNCG
Lock mode
Top
Channel scanning mode
Lock mode
uC
internal
channel
PLL freq.
synthesizer
channel
Decoder
channel
due to XCNCG rising
Txcncg:XCNCG pulse
97
539 7
97
Tpll:uC change frequency synthesizer counter
9
7
5
9
97
due to PLEN active edge
9777 5
9
97
The above example shows the home channel of the pager is
channel 9 (CH3-CH0 = 1001) and pager locks to channel 7.
Figure 7. Channel Scan mode and lock mode
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Publication Release Date: Auguest 1999
Revision A1