Function Table Of Ic - Sharp XL-30V Service Manual

Video cd micro system
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IC401 VHiLC75342M-1: Function/Volume Equalizer (LC75342M)
Pin No.
Port Name
1
DI
2
CE
3
VSS
4
TEST
5
LOUT
6
LBASS2
7
LBASS1
8
LTRE
9
LIN
10
LSEL0
11*
L4
12-14
L3-L1
15*
NC
16*
NC
17-19
R1-R3
20*
R4
21
RSEL0
22
RIN
23
RTRE
24
RBASS1
25
RBASS2
26
ROUT
27*
NC
28
Vref
29
VDD
30
CL
In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.
NC
27
Vref
28
VDD
29
CL
30
1
DI
CE
2
3
VSS
TEST
4

FUNCTION TABLE OF IC

Serial data and clock input pin for control.
Chip enable pin. Data written into an internal latch in a timing of [H] -> [L]. Each analog switch is activated.
Data transfer enabled at [H] level.
Ground pin.
Electronic volume control pin. To be set to the VSS potential.
Volume + equalizer output pin.
Bass-band filter comprising capacitor and resistor connection pin.
Bass-band filter comprising capacitor and resistor connection pin.
Capacitor connection pin comprising treble band filter.
Volume + equalizer input pin.
Input selector output pin.
Input signal pin.
Input signal pin.
No CONNECT pin. To be open or connected to VSS.
No CONNECT pin. To be open or connected to VSS.
Input signal pin.
Input signal pin.
Input selector output pin.
Volume + equalizer input pin.
Capacitor connection pin comprising treble band filter.
Bass-band filter comprising capacitor and resistor connection pin.
Bass-band filter comprising capacitor and resistor connection pin.
Volume + equalizer output pin.
No CONNECT pin. To be open or connected to VSS.
0.5 x VDD voltage generation block for analog ground. Capacitor of several 10µF to be connected between
Vref and AWSS (VSS) as a counter measure against power ripple.
Supply pin.
Serial data and clock input pin for control.
ROUT
RBASS2
RBASS1
26
25
24
RVref
CCB
INTERFACE
LVref
5
6
7
LOUT
LBASS2 LBASS1
Figure 49 BLOCK DIAGRAM OF IC
Function
RIN RSEL0
RTRE
23
22
21
CONTROL
CIRCUIT
LOGIC
CIRCUIT
CONTROL
CIRCUIT
8
9
10
LTRE
LIN
LSEL0
– 49 –
XL-30V
20
R4
R3
19
18
R2
17
R1
16
NC
15
NC
L1
14
13
L2
12
L3
11
L4

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