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M65855FP (EIC1) : Sound processor
1. Pin layout
GND
1
16
ECHOVOL
2
15
REF
3
14
4
13
5
12
6
11
7
10
8
9
3. Block diagram.
REF
CLOCK
3
16
Oscillator
1/2 Vss
AUTO
RESET
LPF1
10
Pin No.
1
GND
CLOCK
2
ECHOVOL
ECHOMUTE
3
REF
V CC
4
OP2 IN
OP1 IN
5
OP2 OUT
OP1 OUT
6
LPF2 IN
LPF1 IN
LPF2 OUT
7
8
LPF1 OUT
MIC OUT
9
MIC IN
MIC IN
10
LPF1 OUT
11
LPF1 IN
12
OP1 OUT
13
OP1 IN
14
V CC
15
ECHOMUTE
16
CLOCK
ECHOMUTE
ECHOVOL
15
2
VOL
DO1
CLOCK
Main control
RESET
DO0
D1
A/D
13
11
12
2. Pin function
Symbol
Echo level control with external DC voltage
To connect 1/2 Vcc output and filter capacitor
Uses external C to from an D/A conversion
integrator
Uses external CR to from a low pass filter at the
input side
Mixing output echo output and microphone
Microphone input
Uses external CR to from a low pass filter at the
input side
Uses external C to from an D/A conversion
integrator
Applies a voltage of 3.5V to 5.5V(Rated5V)
Echo mute control and clock stop control
with external DC voltage
Controls a built -in clock generation circuit with
external R
6
4
5
LPF2
D/A
20Kbit
MO
SRAM
MI
1
14
V cc
GND
MX-G68V/MX-G65V
Function
MIC OUT
7
8
MIX
9
1-45
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