Sharp XL-3000 Service Manual download pdf (Page 44)

XL-3000/3000C

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FUNCTION TABLE OF IC

IC401 VHiLC75342M-1: Function/Volume Equalizer (LC75342M)

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* L3 Input signal pin.

13 L2 Input signal pin.

14 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 R1 Input signal pin.

18 R2 Input signal pin.

19* 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.

Pin No.

Port Name

Function

In this unit, the terminal with asterisk mark (*) is (open) terminal which is not connected to the outside.

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 63 64

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Sharp XL-3000 Service Manual Page 44