MSC1205 データシートの表示（PDF） - Oki Electric Industry

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MSC1205

32-Bit Duplex Controller/Driver with Digital Dimming Function

Oki Electric Industry 

¡ Semiconductor

MSC1205

If the segment data is transferred before the dimming data is transferred after powered on, the

display is turned on at the completion of segment data transfer, with undefined dimming values.

The relationship between data transfer and display is shown in Figure. 3.

VDD

DATA

SEGMENT DATA

DIMMING DATA

LOAD

SEGn

Display OFF

Dimming value is undefined

Display ON

Figure 3. Relationship Between Advance Transfer of Segment Data and Display

Oscillator

Connect an external capacitor (C), as shown in Figure 4. The oscillating frequency fOSC depends

on the external capacitor used. The following equation is true between fOSC and grid frequency

(fGRID):

fGRID = fOSC/2048

Terminal

fOSC

C (82pF)

Figure 4. Oscillation Equivalent Circuit

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