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MITSUBISHI SOUND PROCESSOR ICs
M65845AFP
DIGITAL ECHO WITH MICROPHONE MIXING CIRCUIT
PIN DESCRIPTION
No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Symbol
MIC1IN
ALC1
MIC1NFIN
MIC1OUT
MIC1VOLIN
MIC2IN
ALC2
MIC2NFIN
MIC2OUT
Pin Name
MIC1 INPUT
ALC1 CONTROL
MIC1 NF INPUT
Set up MIC1 amp gain for feedback circuit
MIC1 OUTPUT
MIC1 VOLUME INPUT
MIC2 INPUT
ALC2 CONTROL
MIC2 NF INPUT
Forms MIC 2 amp gain with feedback
MIC2 OUTPUT
Connect microphone volume which turn down
input signal
Mixing output with MIC 1 and MIC 2
Connect microphone volume which turn down
input signal
Connect MIC 2
Connect MIC1
Connect C which determine recovery time
Function
Connect C which determine ALC attack ,recovery time
MIC2VOLIN
MIC2 VOLUME INPUT
MICOUT
LPF1 IN
LPF1 OUT
ADINTIN
ADINTOUT
ADCONT
REF
GND
V
CC
DACONT
MIC OUTPUT
LOWPASS FILTER1
INPUT
LOWPASS FILTER1
OUTPUT
A/D INTEGRAL INPUT
Forms the front lowpass filter with external
CR for digital echo
Forms integrator with external C and R
A/D INTEGRAL
OUTPUT
A/D CONTROL
REFERENCE
GND
POWER SUPPLY
D/A CONTROL
ADM A/D adaptive control
ADM A/D adaptive control
1/2Vcc, connect filter C
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ELECTRIC
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