W93910 Datasheet, PDF (15/35 Pages) Winbond – ERMES PAGING DECODER

W93910
LOST SYNCHCONIZATION
If synchronization is lost for several minutes (pre-defined by option bit LKR1−LKR0 ), the pager will
change to the channel scan mode. The SYNVAL pin will keep low during the lock mode and normal
mode unless the synchronization lost duration exceeds the hold time condition, then the SYNVAL pin
will change to high level and the decoder will go back to the channel scan mode.
OPTION BIT
FUNCTION
LKR1
LKR0
Synchronization lost hold time
0
0
1 min.
0
1
2 min.
1
0
3 min.
1
1
4 min.
Table 9. Lock re-try option bits
RIC (Radio Identify Code) FORMAT
For ERMES system, RIC has 35 bits and is defined by ZC2−ZC0, CC6−CC0, OP2−OP0, IA17−IA0, and
BN3−BN0 option bits as shown in Table 10.
Radio Identify Code
Function
OPID
LOCAL ADDRESS
Zone Code Country Code Operator Code Initial Address Batch Number Paging area
OPTION ZC2−ZC0 CC6−CC0 OP2−OP0
IA17−IA0
BN3−BN0
PA5−PA0
bit
GIA17−GIA0
GPA5−GPA0
Table 10. RIC format
The W93910 provides two initial addresses with corresponding paging area code, IA17−IA0 with
PA5−PA0 and GIA17−GIA0 with GPA5−GPA0, for the same OPID. The first one is dedicated for the
basic RIC. Each pager has one unique batch number, defined by BN3−BN0, and will only turn on and
listen at that specific batch except where a message continues over one batch. If PAEN option bit is set
to "1", the received message must match to the pre--defined paging area code, PA5−PA0. Other than in
this situation, the received paging area code doesn't need to match the pre-defined PA5−PA0, but must
be consistent throughout the whole message. The second IA, GIA17−GIA0, is enabled by setting the
GIAEN option bit to 1. GPAEN has the same function as PAEN, but for GIA17−GIA0 address only.
OPTION BIT
FUNCTION
GIAEN
Second user address (GPA+GIA)
0
Disable
1
Enable
Table 11-1. Second initial address setting option bits
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Publication Release Date: Auguest 1999
Revision A1