Aiwa CDC-X447M Wartungshandbuch PDF herunterladen (Seite 22)

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1 S1 O LCD segment output.

2 S2 O LCD segment ouptut. (Not used)

3 ~ 37 S3 ~ S37 O LCD segment output.

38 ~ 39 S38 ~ S39 O LCD segment output. (Not used)

40 ~ 43 COM1 ~ COM4 O LCD common driver output.

44 ~ 45 KS1 ~ KS2 O Key scan output. (Not used)

46 ~ 49 KS3 ~ KS6 O Key scan output.

50 ~ 54 KI1 ~ KI5 I Key scan input. These pins incorporate pull-down resistors.

55 TEST – Test pin. (Connected to GND)

56 VDD – Power supply.

57 VDD1 I

2/3 bias voltage is applied to the LCD drive externally.

(Must be connected to VDD2 when a 1/2 bias drive scheme is used)

58 VDD2 I

1/3 bias voltage is applied to the LCD drive externally.

(Must be connected to VDD1 when a 1/2 bias drive scheme is used)

59 VSS – GND.

60 OSC I Resistor and capacitor are attached externally form an oscillator circuit.

61 DO O Serial data interface pin; output data.

62 CE O Serial data interface pin; chip enable.

63 CL O Serial data interface pin; synchronization.

64 DI I Serial data interface pin; data transferred.

40 TP(R)

41 TUN(R)

I Signal input pins.

42 CD(R)

43 AUX(R)

44 RSELO O Input selector output pin.

Pin No. Pin Name I/O Description

IC, LC75854W

Pin No. Pin Name I/O Description

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 33 34

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Aiwa CDC-X447M Wartungshandbuch Seite 22