MSM7577 Просмотр технического описания (PDF) - Oki Electric Industry
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MSM7577 Datasheet PDF : 8 Pages
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¡ Semiconductor
MSM7577
PIN DESCRIPTION
Pin No.
1
Name I/O
TAUD
O
2
AN2
I
3
PD
1
4
RCV2
O
5
RCV1
O
6
NC
—
7
RAUD
I
8
GND
—
9
ATT0
10
ATT1
I
11
ATT2
Description
Output pin of transmitting voice.
Receive voice input.
Gain control should be connected by a resistor between AN2 pin RCV2 pin.
Power down control.
H : Power down
L : Power on
Output pin of receiving voice.
Gain control should be connected by a resistor between AN2 and RCV2 pin.
RCV2 signal is opposite phase to RCV1 signal.
Receive voice input.
RCV1 signal is opposite phase to RCV2 signal.
No Connection.
Receive voice input.
Ground (0 V).
Volume control.
ATT2
0
0
0
0
1
1
1
1
ATT1
0
0
1
1
0
0
1
1
ATT0
0
1
0
1
0
1
0
1
Loss level (dB)
0 ±0.3
–2 ±0.3
–4 ±0.3
–7 ±0.3
–10 ±0.3
–13 ±0.3
–16 ±0.3
–19 ±0.3
Mute signal input.
12
ATTE
I
H : Mute mode
L : Operating mode
Gain control and frequency responce control.
13
AN3
I
Gain control should be controlled by a resistor between AN3 and AO3.
14
MIC
I
Input pin of Microphone signal.
Gain control and frequency responce control.
15
AO3
O
Gain control should be controlled by a resistor between AN3 and AO3.
16
VDD
—
Power supply (+3 V).
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