MSM9004 datasheet(12/15 Pages) OKI

Part #	MSM9004

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

PDF	15 Pages

Scroll/Zoom	100%

Manufacturer	OKI [OKI electronic componets]

Direct Link	http://www.oki.com

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12 / 15 page

¡ Semiconductor

MSM9004-03/04

12/15

How to Decrease Transfer Time When Unused Segments Exist

The MSM9004-03/04 can operate even if segment data is not full. Input data as in the figure

shown below. In this case, the last 4 bits are the select bits.

Transfer example: for 30 segments

D29 D28 D27 D26

D30

LCD display bits

(30 bits)

Dummy bits

(2 bits)

Select bits

(4 bits)

CLOCK2

DATA

LOAD

Note:

Always set "0" to the dummy bit.

Recommended RC Values for MSM9004-04 Oscillation Circuit

Shown below are the recommended oscillation resistor (RO) and capacitor (CO) values for

providing frame frequency fFRM of approximately 62 Hz to 190 Hz.

• RO = 62 kW ± 5%

• CO = 0.01 mF ± 5%

(Resistance and capacitance variations due to temperature change are not included.)

For requirements of supply voltage (VDD), ambient temperature range (Ta), and frame frequency

(fFRM):

• VDD = 5.0 V

• Ta = –40 to +85

°C

• fFRM =

oscillation frequency

MSM9004 Datasheet(PDF) 12 Page - OKI electronic componets