Aiwa CDC-Z127 Service Manual page 35

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Pin No. Pin Name
41 TUN(R)
42 CHG(R)
43 AUX(R)
44 RSELO
IC, LC75853NW
Pin No. Pin Name
1 S1
2 S2
3 S3
4 S4
5 ~ 35 S5 ~ S35
TE
L 13942296513
36 ~ 40 S36 ~ S40
41 ~ 43 COM1~ COM3
44 ~ 49 KS1 ~ KS6
50 ~ 52 KI1 ~ KI3
53 ~ 54 KI4 ~ KI5
55 TEST
56 VDD
57 VDD1
58 VDD2
59 VSS
60 OSC
61 DO
62 CE
63 CL
64 DI
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I/O
I Signal input pins.
- Not used.
I Signal inputs pins.
O Input selector output pins.
I/O
O LCD segment output.
- Not used.
O LCD segment output.
- Not used.
- LCD segment output.
- Not used.
O LCD command driver output.
O Key scan output.
I Key scan input. These pins have build-in pull-down resistor.
- Connected to GND.
- Test pin. (Connected to GND.)
- Power supply.
Used for applying the LCD drive 2/3 bias voltage externally. (Must be connected to VDD2 when
I
a 1/2 bias drive scheme is used.) (Not used)
Used for applying the LCD drive 1/3 bias voltage externally. (Must be connected to VDD1 when
I
a 1/2 bias drive scheme is used.) (Not 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.
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Description
Description
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