W93910 Datasheet, PDF (17/35 Pages) Winbond – ERMES PAGING DECODER

W93910
TXCLK
TXDATA
Start Batch3-0
CC6-0
Op2-0 Cycle No5-0
Hour4-0 Reserved Stop
DATA INPUT
Figure 10. System information read out format
The 4 level FSK signal is converted to 2 bit digital signal by IF demodulator, as shown in Figure 11,
where fn is the carrier frequency from 169.425 MHz to 169.8 MHz. The 2 bit digital signal should be
connected to the D1(MSB), D0(LSB) inputs of W93910. The D1 and D0 inputs could be inverted by
setting the D1IV, and D0IV option bits to provide some flexibility.
OPTION BIT
FUNCTION
D1IV, D0IV
D1 input, D0 input
0
Non-inversion
1
Inversion
Table 13. D1, D0 relative option bits
10
(fn-4687.5Hz)
11
(fn-1562.5Hz)
01
(fn+1562.5Hz)
00
(fn+4687.5Hz)
D1 : 0
D0 _{: 1}
0
1
1
0
0
1
0
1
1
0
Figure 11. 4 PAM mapping to D1, D0(fn is the channel carrier frequency)
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Publication Release Date: Auguest 1999
Revision A1