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LC75879PT Scheda tecnica(PDF) 7 Page - ON Semiconductor |
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LC75879PT Scheda tecnica(HTML) 7 Page - ON Semiconductor |
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7 / 35 page  LC75879PT No.A1687-7/35 Pin Functions Pin Pin No. Function Active I/O Handling when unused S1/P1 to S8/P8 S9 to S66 S68 79, 80, 1 to 6 7 to 64 69 Segment outputs for displaying the display data transferred by serial data input. The S1/P1 to S8/P8 pins can be used as general-purpose output ports under serial data control. - O OPEN COM1 to COM3 COM4/S67 65 to 67 68 Common driver outputs The frame frequency is fo[Hz]. The COM4/S67 pin can be used as a segment output in 1/3 duty. - O OPEN S69/OSCI 74 Segment output. This pin can also be used as the external clock input pin when the external clock operating mode is selected by control data. - I/O OPEN CE CL DI 76 77 78 Serial data transfer inputs. Must be connected to the controller. CE: Chip enable CL: Synchronization clock DI: Transfer data H - I I I GND INH 75 Display off control input •INH=low(VSS)….Display forced off S1/P1 to S8/P8=low (VSS) (These pins are forcibly set to the general-purpose output port function and held at the VSS level.) S9 to S66,S68=low(VSS) COM1 to COM3=low(VSS) COM4/S67=low(VSS) S69/OSCI=low(VSS) (This pin is forcibly set to the segment output port function and held at the VSS level.) Stops the internal oscillator. Inhibits external clock input. Display contrast adjustment circuit stopped. •INH=high(VDD)…Display on Enables the internal oscillator circuit. (Internal oscillator operating mode) Enables external clock input. (External clock operating mode) Display contrast adjustment circuit operation is enabled. However, serial data transfer is possible when the display is forced off. L I GND VDD1 71 Used to apply the LCD drive 2/3 bias voltage externally. - I OPEN VDD2 72 Used to apply the LCD drive 1/3 bias voltage externally. - I OPEN VDD 70 Power supply pin. A power voltage of 4.5 to 6.3V must be applied to this pin. - - - VSS 73 Ground pin. Must be connected to ground. - - - |
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