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ST75C540 Datasheet(PDF) 82 Page - STMicroelectronics

Part # ST75C540
Description  SUPER INTEGRATED DEVICESWITH DSP, AFE & MEMORIES FORTELEPHONY,MODEM, FAXOVERINTERNET& POTSLINES
PDF  84 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST75C540 Datasheet(HTML) 82 Page - STMicroelectronics

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XIX - APPENDIX A : MODES OF OPERATION (continued)
DG
AGC
DUAL
RAM
INTERFACE
4 TONE *
DETECTORS
AGC
CODER
4 TONE *
GENERATOR
* default is 2.
RING
DETECTOR
15
ADC
MUTE
DAC
Line
HYBRID
TxA1
TxA2
RxA
ADC
14
11
10 MIC3
8
MIC1
9
MIC2
79
SPK2
78
MUTE
77
SPK3
76
MUTE
2
SPK1
1
MUTE
[0..-30]dB
Step 3dB
DAC
ATT_MIC
ATT_TX
Figure 56 : Telephone Mode (HANDSET)
15
ADC
MUTE
DAC
Line
HYBRID
TxA1
TxA2
RxA
ADC
14
11
10
MIC3
8
MIC1
9
MIC2
79
SPK2
78
MUTE
77
SPK3
76
MUTE
2
SPK1
1
MUTE
[0..-30]dB
Step 3dB
DAC
ATT_MIC
DG
DG
Programmable
Attenuation
Addition
of Signals
Automatic
Gain
4 TONE
DETECTORS
DTMF
DETECTOR
AGC
LINE ECHO
CANCELLER
DUAL
RAM
INTERFACE
ATT_TX
Figure 55 : Room Monitoring Mode (ROOM)
ST75C530 - ST75C540
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