PDP-504PU
98
1
2
3
4
1
2
3
4
C
D
F
A
B
E
BD3869AS (HD AUDIO ASSY : IC3502)
• Audio sound controller
Block DIagram
B A S S
I
2
C B U S L o g i c
F B 1 1
O U T 2
V C C
I N 2
F B 2 2
S D A
F B 1 2
C H I P
V C C / 2
F B 2 1
F I L T E R G N D
M U T E
S C L
M U T E
R E A R
V O L U M E
R E A R
V O L U M E
O U T 1
2 5 K
2 5 K
B A S S
F T 2
I N 1
F T 1
L O U D 1
L O U D 2
+
f=80Hz
f=80Hz
f=15kHz
f=15kHz
T R E B L E
T R E B L E
F R O N T
V O L U M E
F R O N T
V O L U M E
1 2
1 3
1 4
1 5
1 6
1 1
1 0
1 7
1 8
2
1
3
4
6
7
8
9
5
No.
Pin Name
Function
Pin Description
1
FT1
CH1 Treble Filter Setting Pin
A pin for setting Treble frequency characteristic
2
FT2
CH2 Treble Filter Setting Pin
3
IN1
CH1 Input Pin
A pin for Inputting sound signal to main volume
4
LOUD1
CH1 Loudness Filter Setting Pin
A pin for setting the loudness frequency characteristics and gain
5
IN2
CH2 Input Pin
A pin for Inputting sound signal to main volume
6
LOUD2
CH2 Loudness Filter Setting Pin
A pin for setting the loudness frequency characteristics and gain
7
CHIP
Chip Select Pin
Terminal of Slave address select of I
2
C Bus
8
FILTER
1/2 VCC Pin
1/2 VCC. Voltage for power supply of signal system
9
GND
Ground pin
A ground pin
10
SDA
I
2
C Communication Data Pin
Terminal of SDA of I
2
C bus. ACKNOWLEDGE signal is outputted.
Data terminal
11
SCL
I
2
C Communication Data Pin
Terminal of SCL of I
2
C bus. Clock terminal
12
VCC
Power Supply Pin
Power Supply Pin
13
OUT1
CH1 Output Pin
A pin for outputting a sound signal. Connect this pin to a rear stage
14
OUT2
CH2 Output Pin
circuit through a coupling capacitor
15
FB12
CH1 Bass Filter Setting Pin
16
FB11
CH1 Bass Filter Setting Pin
A pin for setting Bass frequency characteristic and gain
17
FB21
CH2 Bass Filter Setting Pin
18
FB22
CH2 Bass Filter Setting Pin
Pin Function
