MSM9004-04 Ver la hoja de datos (PDF) - Oki Electric Industry

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componentes Descripción

Fabricante

MSM9004-04

1/4 DUTY LCD DRIVER WITH 4-DOT COMMON DRIVER AND 50-DOT SEGMENT DRIVER

Oki Electric Industry 

¡ Semiconductor

MSM9004-03/04

PIN DESCRIPTIONS

Pin Symbol Type Connected to

Description

56 CLOCK1*1 I

Micro-

controller

System clock input pin.

For details see "MSM9004-04 Oscillation Circuit characteristics".

56 OSC *2 I External

Pin for oscillation.

VDD

resistor

Connecting the external resistor and capacitor to

Capacitor

configure the oscillation circuit.

Connect the resistor and capacitor as shown in

OSC

the right figure.

Make the length of wiring between this pin and the

VSS

external resistor and capacitor as short as possible.

53 DATA

I Micro-

Serial data input.

controller For details on the configuration of input data, see "Data Configuration".

52 CLOCK2

I Micro-

Shift clock input (Schmitt circuit included).

controller Input data is read synchronizing with the rising edge of this clock.

54 LOAD

I Micro-

Load signal input (Schmitt circuit included).

controller Serial input data is transferred to the display latch when this LOAD

51 BLANK

I

signal is at a "H" level.

Input pin for turning off all segments.

—

All segments turn off, regardless of the display data, when this pin is

at a "L" level, and all segments return to the status before turning off.

61 to 64 COM1-4

O LCD

LCD common output pins.

1 to 50 SEG1-50 O LCD

LCD segment output pins.

60 VLC1

59 VLC2

58 VLC3

Power

supply

Bias power supply pins for driving the LCD.

Conditions for bias voltage are as follows :

—

3.7V £ VDD – VLC3 £ 5.5V

2

VLC1 = VDD – 3 (VDD – VLC3)

1

VLC2 = VDD – 3 (VDD – VLC3)

55 VDD

57 VSS

VLC3 ≥ VSS

Power

Power supply pins.

supply

—

Normally used as VDD = 4.5 to 5.5 V and Vss = 0 V.

*1 Applied to MSM9004-03.

*2 Applied to MSM9004-04.

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