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

XL-30H/30W
IC401 VHiLC75342M-1: Function/Volume Equalizer (LC75342M)
Pin No. Port Name
1 DI Serial data and clock input pin for control.
2 CE 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.
3 VSS Ground pin.
4 TEST Electronic volume control pin. To be set to the VSS potential.
5 LOUT Volume + equalizer output pin.
6 LBASS2 Bass-band filter comprising capacitor and resistor connection pin.
7 LBASS1 Bass-band filter comprising capacitor and resistor connection pin.
8 LTRE Capacitor connection pin comprising treble band filter.
9 LIN Volume + equalizer input pin.
10 LSEL0 Input selector output pin.
11* L4 Input signal pin.
12-14 L3-L1 Input signal pin.
15* NC No CONNECT pin. To be open or connected to VSS.
16* NC No CONNECT pin. To be open or connected to VSS.
17-19 R1-R3 Input signal pin.
20* R4 Input signal pin.
21 RSEL0 Input selector output pin.
22 RIN Volume + equalizer input pin.
23 RTRE Capacitor connection pin comprising treble band filter.
24 RBASS1 Bass-band filter comprising capacitor and resistor connection pin.
25 RBASS2 Bass-band filter comprising capacitor and resistor connection pin.
26 ROUT Volume + equalizer output pin.
27* NC No CONNECT pin. To be open or connected to VSS.
28 Vref 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.
29 VDD Supply pin.
30 CL Serial data and clock input pin for control.
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
VSS 3
TEST 4
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FUNCTION TABLE OF IC

ROUT RBASS2 RBASS1
26 25
24
RVref
CCB
INTERFACE
LVref
5 6 7
LOUT LBASS2 LBASS1
Figure 44 BLOCK DIAGRAM OF IC
Function
RIN RSEL0
RTRE
23 22 21
CONTROL
CIRCUIT
LOGIC
CIRCUIT
CONTROL
CIRCUIT
8 9 10
LIN LSEL0
LTRE
– 44 –
20
R4
19 R3
18
R2
17 R1
16 NC
15 NC
14 L1
13
L2
12 L3
11 L4