W925EP01 Datasheet, PDF (89/108 Pages) Winbond – 8-BIT CID MICROCONTROLLER

W925EP01/ W925EP01FG
ADDRESS
(CIDGA.2-0)
INTERNAL CID GAIN CONTROL REGISTER
SUGGESTION
VALUE
000
DTMFR1: DTMF register1
0000 0001B
001
DTMFR2: DTMF register2
011X 0001B^Ê
002
PGAF: Programmable gain control alert tone and FSK
99H
003
PGAD: Programmable gain control DTMF
A7H
004
PHAD: Programmable hysteresis alert tone and DTMF
35H
005
PHFL: Programmable hysteresis FSK and low pass filter
33H
Ê _{X=0 DTMF receiver works a DTMF decoder, X=1 DTMF receiver works as a tone detector.}
The signals to set internal CID gain control registers is shown in Figure 6-20
CIDGA
CIDGA<2:0>
CIDGD
CIDGD
CIDGA.3
Rising latch
DTMFR1
Figure 6-20 Internal CID Gain Control Register Setting Waveform
DTMFR1 [7:4] are reserved bits and must be 0000b.
BIT3~BIT0
0000
0001
001X
01XX
1XXX
DTMFR2
ACCEPTABLE ERROR PERCENTAGE TO SAMPLE 4 PERIOD OF ROW FREQ.
0.6% (default)
2.5%
3.5%
Reserved
Reserved
BIT3~BIT0
0000
0001
001X
01XX
1XXX
ACCEPTABLE ERROR PERCENTAGE TO SAMPLE 4 PERIOD OF COL FREQ.
0.5% (default)
1.5%
2.5%
Reserved
Reserved
The acceptable error percentage may have small variation by different test environments.
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Publication Release Date: Apr. 10, 2006
Revision A2