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LC75878E Datasheet(PDF) 7 Page - Sanyo Semicon Device |
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LC75878E Datasheet(HTML) 7 Page - Sanyo Semicon Device |
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7 / 33 page  No. 6473 -7/39 LC75878E, 75878W Pin Pin No. Function Active I/O Handling LC75878E LC75878W when unused S1 to S73 3 to 75 1 to 73 Segment driver outputs. S74/COM10 76 74 The S74/COM10 and S75/COM9 pins can be used as common — q q Open S75/COM9 77 75 driver outputs under the control data. COM1 to COM8 85 to 78 83 to 76 Common driver outputs. — q q Open P1 to P4 86 to 89 84 to 87 General-purpose output ports. — q q Open OSC 98 96 — I/O VDD CE 100 98 HI CL 1 99 I GND DI 2 100 —I INH 99 97 L I GND VLCD092 90 — O Open VLCD193 91 — I Open VLCD294 92 — I Open VLCD395 93 — I Open VLCD496 94 — I GND VDD 90 88 —— — VLCD 91 89 —— — VSS 97 95 Power supply connection. Connect to ground. — — — Pin Functions Oscillator connection. An oscillator circuit is formed by connecting an external resistor and capacitor at this pin. Serial data transfer inputs. These pins are connected to the microcontroller. CE :Chip enable CL :Synchronization clock DI :Transfer data v Input that turns the display off and forces the general-purpose output ports low. • When INH is low (VSS) • Display off S1 to S73 = “L” (VLCD4). S74/COM10, S75/COM9 = “L” (VLCD4) COM1 to COM8 = “L” (VLCD4). • General-purpose output ports P1 to P4 = low (VSS) • When INH is high (VDD) • Display on • The states of the general-purpose output ports can be set by the PC1 to PC4 control data. However, serial data can be transferred when the INH pin is low. LCD drive 3/4 bias voltage (middle level) supply pin. This pin can be used to supply the 3/4 (VLCD0 – VLCD4) voltage level externally. LCD drive 2/4 bias voltage (middle level) supply pin. This pin can be used to supply the 2/4 (VLCD0 – VLCD4) voltage level externally. LCD drive 1/4 bias voltage (middle level) supply pin. This pin can be used to supply the 1/4 (VLCD0 – VLCD4) voltage level externally. LCD drive 0/4 bias voltage (low level) supply pin. Fine adjustment of the display contrast can be implemented by connecting an external variable resistor to this pin. However, (VLCD0 – VLCD4) must be greater than or equal to 4.5 V, and VLCD4 must be in the range 0 V to 1.5 V, inclusive. Logic block power supply connection. Provide a voltage of between 2.7 and 6.0V. LCD driver block power supply connection. Provide a voltage of between 7.0 and 11.0 V when the display contrast adjustment circuit is used and provide a voltage of between 4.5 and 11.0 V when the circuit is not used. LCD drive 4/4 bias voltage (high level) supply pin. The level on this pin can be changed by the display contrast adjustment circuit. However, (VLCD0 – VLCD4) must be greater than or equal to 4.5 V. Also,external power must not be applied to this pin since the pin circuit includes the display contrast adjustment circuit. |
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