Sharp CD-MPX870 Service Manual page 89

IC601 VHiLC75341/-1: Audio Processor (LC75341)
Pin No. Terminal Name
1 DI
2 CE
3 VSS
4 LOUT
5 LBASS
6 LTRE
7 LIN
8 LSEL0
9-12 L4-1
CD
L4 9
Tuner
10
L3
Tape
11
L2
Video
12
L1
R1 13
R2 14
R3
15
16
R4
Function
Serial data and clock input pin for
control.
Chip enable pin.
Data written into an internal latch in
a timing of "H" to "L".
Each analog switch is activated.
Data transfer enabled at "H" level.
Ground pin.
Bass band filter comprising
capacitor and resistor connection pin
and bass/treble output pin.
Bass band filter comprising capacitor
and resistor connection pin.
Treble band filter comprising capaci-
tor and resistor connection pin.
Volume + equalizer output pin.
Input selector output pin.
Input signal pin.
8 7
CONTROL
CONTROL
CONTROL
17 18
Figure 8-6 BLOCK DIAGRAM OF IC
Pin No. Terminal Name
13-16 R1-4
17 RSEL0
18 RIN
19 RTRE
20 RBASS
21 ROUT
22 VREF
23 VDD
24 CLK
6 5
CIRCUIT
CCB
INTERFACE
CIRCUIT
CIRCUIT
19 20
8 – 6
Function
Input signal pin.
Input selector output pin.
Volume + equalizer output pin
Treble band filter comprising capaci-
tor and resistor connection pin.
Bass band filter comprising capaci-
tor and resistor connection pin.
Bass band filter comprising capaci-
tor and resistor connection pin and
bass/treble output pin.
0.5x VDD voltage generation block
for analog ground. Capacitor of sev-
eral 10µF to be connected between
VREF and AWSS (VSS) as a coun-
termeasure against power ripple.
Supply pin
Serial data and clock input pin for
control.
4
LVref
RVref
21
CD-MPX870
3
VSS
2 CE
1
DI
24 CLK
23 VDD
VREF
22