Aiwa CDC-Z107 Service Manual page 30

Pin No. Pin Name
40 TP(R)
41 TUN(R)
42 CD(R)
43 AUX(R)
44 RSELO
IC, LC75853NW
Pin No. Pin Name
1 ~ 40 S1 ~ S40
41 ~ 43 COM1~ COM3
44 ~ 49 KS1 ~ KS6
50 ~ 54 KI1 ~ KI5
55 TEST
56 VDD
57 VDD1
58 VDD2
59 VSS
60 OSC
61 DO
62 CE
63 CL
64 DI
I/O
I Signal input pins.
O Input selector output pin.
I/O
O LCD segment output.
O LCD command driver outputs.
O Key scan outputs.
I Key scan inputs. These pins have build-in pull-down resistor.
- Test pin. (Connected to GND.)
- Power supply.
Used for applying the LCD drive 2/3 bias voltage externally. (Must be connected to
I
VDD2 when a 1/2 bias drive scheme is used.)
Used for applying the LCD drive 1/3 bias voltage externally. (Must be connected to
I
VDD1 when a 1/2 bias drive scheme is used.
- Power supply. (Connected to GND.)
I/O Resistor and capacitor are attached externally form an oscillator circuit.
O Serial data interface pin; output data.
O Serial data interface pin; chip enable.
O Serial data interface pin; synchronization.
O Serial data interface pin; data transferred.
Description
Description
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