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LC75897PW Folha de dados(PDF) 8 Page - ON Semiconductor |
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LC75897PW Folha de dados(HTML) 8 Page - ON Semiconductor |
8 / 35 page LC75897PW http://www.onsemi.com 8 Pin Functions Symbol Pin No. Function Active I/O Handling when unused S1/P1 to S8/P8 S9 to S128 1 to 8 9 to 128 Segment outputs for displaying the display data transferred by serial data input. Also, by the control data, S1/P1 to S3/P3 can be used as a general- purpose output port or PWM output port, while S4/P4 can be used as a general-purpose output port or clock output port and S5/P5 to S8/P8 can be used as a general-purpose output port. - O OPEN COM1 to COM3 COM4/S129 132 to 130 129 Common driver outputs. The frame frequency is fo [Hz]. The COM4/S129 pin can be used as a segment output in 1/3 duty. - O OPEN OSC 140 Oscillator connection. An oscillator circuit is formed by connecting an external resistor and capacitor to this pin. This pin can also be used as the external clock input pin as controlled by control data. - I/O VDD CE CL DI 142 143 144 Serial data transfer inputs. These pins are connected to the control microprocessor. CE: Chip enable CL: Synchronization clock DI: Transfer data H - I I I GND INH 141 Display off control input • INH = low (VSS) ...Off S1/P1 to S8/P8 = low (VSS) (These pins are forcibly set to the segment output port function and fixed at the VSS level.) S9 to S128 = low (VSS) COM1 to COM3 = low (VSS) COM4/S129 = low (VSS) OSC = "Z" (high impedance) RC oscillation stopped External clock input inhibited Display contrast adjustment circuit stopped • INH = high (VDD) ...On RC oscillation enabled (RC oscillator operating mode) Enables external clock input (external clock operating mode). Display contrast adjustment circuit enabled Note that serial data transfers can be performed when the display is forced off by this pin. L I GND VLCD0 135 LCD drive 3/3 bias voltage (high level) supply. This level can be modified using the display contrast adjustment circuit. However, note that VLCD0 must be greater than or equal to 2.7V. Also, since this IC provides the built- in display contrast adjustment circuit, applications must not attempt to provide this level from external circuits. - O OPEN VLCD1 136 LCD drive 2/3 bias voltage (middle level) supply. It is possible to supply the 2/3VLCD0 voltage to this pin externally. This pin must be shorted to VLCD2 if 1/2 bias is used. - I OPEN VLCD2 137 LCD drive 1/3 bias voltage (middle level) supply. It is possible to supply the 1/3VLCD0 voltage to this pin externally. This pin must be shorted to VLCD1 if 1/2 bias is used. - I OPEN VDD 133 Logic block power supply. Provide a voltage in the range 2.7 to 6.0V. - - - VLCD 134 LCD driver block power supply. When VLCD0 is between 0.70VLCD and 0.95VLCD, supply a voltage in the range 4.0 to 6.0V. When VLCD0 and VLCD will be equal, supply a voltage in the range 2.7 to 6.0V. - - - VSS 138,139 Ground pin. Connect to ground. - - - |
Nº de peça semelhante - LC75897PW |
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Descrição semelhante - LC75897PW |
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