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LC75814V Arkusz danych(PDF) 5 Page - ON Semiconductor |
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LC75814V Arkusz danych(HTML) 5 Page - ON Semiconductor |
5 / 14 page Pin Functions No. 6792-5/14 LC75814V CE: Chip enable CL: Synchronization clock DI: Transfer data H — S1/P1 to S4/P4 S5 to S16 Pin 1 to 4 5 to 16 — 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 17 to 20 — O Open Common driver outputs. The frame frequency fO is given by: fO = (fOSC/512) Hz. OSC 26 CE CL DI 28 29 30 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 23 — 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 24 — 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 21 — — — Logic block power supply. Provide a voltage in the range 2.7 to 6.0 V. VLCD 22 — — — LCD driver block power supply. Provide a voltage in the range 2.7 to 6.0 V. VSS 25 — — — Ground pin. Connect to ground. INH 27 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 S16 = 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 1 B0 CL CE DI ILC00273 1 B1 1 B2 1 B3 0 A0 0 A1 1 A2 0 A3 D1 D2 D3 D21 D22 D23 D24 D25 D26 D27 D28 D29 D30 D31 D32 0 P0 P1 P2 DR SC BU 0 CCB address 8 bits Display data 32 bits Control data 7 bits DD 1 bit 1 B0 1 B1 1 B2 1 B3 0 A0 0 A1 1 A2 0 A3 D33 D34 D35 D53 D54 D55 D56 D57 D58 D59 D60 D61 D62 D63 D64 0 0 0 0 0 0 0 1 CCB address 8 bits Display data 32 bits Fixed data 7 bits DD 1 bit |
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