MSM9004 datasheet(12/15 Pages) OKI

No de pièce	MSM9004

Description	1/3, 1/4 DUTY LCD DRIVER WITH 4-DOT COMMON DRIVER AND 49-DOT SEGMENT DRIVER

PDF	15 Pages

Scroll/Zoom	100%

Fabricant	OKI [OKI electronic componets]

Site Internet	http://www.oki.com

Logo

12 / 15 page

¡ Semiconductor

MSM9004-01/02

12/15

How to Decrease Transfer Time When Unused Segments Exist

The MSM9004-01/02 can operate even if segment data is not full. Input data as shown in the

figure 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

(3 bits)

Select bits

(4 bits)

CLOCK2

DATA

LOAD

Note:

Always set "0" to the dummy bits.

Recommended RC Values for MSM9004-02 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 Fiches technique(PDF) 12 Page - OKI electronic componets