MSM9004-01 Ver la hoja de datos (PDF) - Oki Electric Industry

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MSM9004-01

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

Oki Electric Industry 

¡ Semiconductor

MSM9004-01/02

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

CLOCK2

DATA

D30 D29 D28 D27 D26

LOAD

LCD display bits

(30 bits)

Note: Always set "0" to the dummy bits.

D2 D1 0 0 0 C1 C2 C3 C4

Dummy bits

(3 bits)

Select bits

(4 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 =

1

24

oscillation frequency

12/15

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