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LC75844M Scheda tecnica(PDF) 6 Page - Sanyo Semicon Device |
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LC75844M Scheda tecnica(HTML) 6 Page - Sanyo Semicon Device |
6 / 15 page LC75844M No.6235-6/15 Pin Functions Symbol Pin No. Function Active I/O Handling when unused S1/P1 to S4/P4 S5 to S22 1 to 4 5 to 22 Segment outputs for displaying the display data transferred by serial data input. The S1/P1 to S4/P4 pins can be used as general-purpose output ports under serial data control. - O OPEN COM1 to COM4 23 to 26 Common driver outputs The frame frequency (fo) is given by: fo=(fosc/512) Hz. - O OPEN OSC 32 Oscillator pin, which, together with externally connected resistor and capacitor, makes up an oscillator circuit. - I/O VDD CE CL DI 34 35 36 Serial data transfer input pin to be connected to the controller. CE: Chip enable CL: Synchronization clock DI: Transfer data H - I I I GND INH 33 Display off input pin • INH=”L” (VSS) ... OFF S1/P1 to S4/P4=”L” (VSS) (Fixed to “L” after forced selection of segment output port.) S5 to S22=”L” (VSS) COM1 to COM4=”L” (VSS) • INH=”H” (VDD) ... ON Note that the serial data can be transferred when OFF. L I GND VLCD1 29 Used for applying the LCD driver 2/3 bias voltage externally. Must be connected to VLCD2 when a 1/2 bias scheme is used. - I OPEN VLCD2 30 Used for applying the LCD driver 1/3 bias voltage externally. Must be connected to VLCD1 when a 1/2 bias scheme is used. - I OPEN VDD 27 Logic block power supply pin to provide a voltage between 2.7V to 6.0V. - - - VLCD 28 LCD driver power supply pin to provide a voltage between 2.7V to 6.0V. - - - VSS 31 Power supply pin to connect to ground. - - - |
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