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LC75844 Arkusz danych(PDF) 5 Page - Sanyo Semicon Device |
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LC75844 Arkusz danych(HTML) 5 Page - Sanyo Semicon Device |
5 / 14 page Pin Functions No. 6235-5/14 LC75844M CE: Chip enable CL: Synchronization clock DI: Transfer data H — S1/P1 to S4/P4 S5 to S22 Pin 1 to 4 5 to 22 — O Open Segment outputs for displaying the display data transferred by serial data input. The pins S1/P1 to S4/P4 can be used as general-purpose output ports when so set up by the control data. COM1 COM2 COM3 COM4 23 24 25 26 — O Open Common driver outputs. The frame frequency fO is given by: fO = (fOSC/512) Hz. OSC 32 CE CL DI 34 35 36 Serial data transfer inputs. These pins are connected to the control microprocessor. — I/O VDD I GND Oscillator connection An oscillator circuit is formed by connecting an external resistor and capacitor to this pin. VLCD1 29 — I Open Used to apply the LCD drive 2/3 bias voltage externally. This pin must be connected to VLCD2 when 1/2 bias drive is used. VLCD2 30 — I Open Used to apply the LCD drive 1/3 bias voltage externally. This pin must be connected to VLCD1 when 1/2 bias drive is used. VDD 27 —— — Logic block power supply. Provide a voltage in the range 2.7 to 6.0 V. VLCD 28 —— — LCD driver block power supply. Provide a voltage in the range 2.7 to 6.0 V. VSS 31 —— — Ground pin. Connect to ground. INH 33 L I GND Display off control input •INH = low (VSS): Off S1/P1 to S4/P4 = Low (These pins are forcibly set to the segment output port function and fixed at the VSS level.) S5 to S22 = Low (VSS), COM1 to COM4 = Low (VSS) •INH = high (VDD): On Note that serial data transfers can be performed when the display is forced off by this pin. Active I/O Handling when unused Function Pin No. Serial Data Transfer Format 1. When CL is stopped at the low level Note: DD ... Direction data CE CL DI A12600 00100010 B0 B1 B2 B3 A0 A1 A2 A3 D1 D2 D3 D37 D38 D39 D40 D41 D42 D43 D44 00000 P0 P1 P2 DR SC BU 0 00100010 B0 B1 B2 B3 A0 A1 A2 A3 D45 D46 D47 D81 D82 D83 D84 D85 D86 D87 D88 000000000001 CCB address 8 bits CCB address 8 bits Display data 44 bits Display data 44 bits Control data 11 bits Fixed data 11 bits DD 1 bit DD 1 bit |
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