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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
Pin No. Pin Name I/O Description
1 ~ 40 S1 ~ S40 O LCD segment output.
41 ~ 43 COM1~ COM3 O LCD command driver outputs.
44 ~ 49 KS1 ~ KS6 O Key scan outputs.
50 ~ 54 KI1 ~ KI5 I Key scan inputs. These pins have build-in pull-down resistor.
55 TEST - Test pin. (Connected to GND.)
56 VDD - Power supply.
57 VDD1 I
Used for applying the LCD drive 2/3 bias voltage externally. (Must be connected to
VDD2 when a 1/2 bias drive scheme is used.)
58 VDD2 I
Used for applying the LCD drive 1/3 bias voltage externally. (Must be connected to
VDD1 when a 1/2 bias drive scheme is used.
59 VSS - Power supply. (Connected to GND.)
60 OSC I/O 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 O Serial data interface pin; data transferred.
IC, LC75853NW
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