Function Table Of Ic - Sharp XL 1700 - Executive Microsystem Service Manual

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* L3
13 L2
14 L1
15* NC
16* NC
17 R1
18 R2
19* 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.

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.
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 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 10 F 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.
Function
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XL-1700/1700C