MSC1209 データシートの表示（PDF） - Oki Electric Industry

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MSC1209

42-Bit Vacuum Fluorescent Display Tube Driver with Digital Dimming Function

Oki Electric Industry 

¡ Semiconductor

MSC1209

Blank Function

Inputting a "L" level to the BLANK pin turns display off (segment output = "L"). At this

time, grid outputs are output normally.

Initial Setting

When power is turned on (i.e., when segment data has never been transferred), the display is

turned off (segment output = "L"). Display is turned on at the moment when transfer of the

segment data is complete. The relationship between the data transfer and display is shown in

Figure 2.

VDD

DATA

LOAD

SEGn

Dimming Data

Segment Data

Display OFF

Display ON

Figure 2 Relationship Between Data Transfer and Display

If, after power-on, the segment data is transferred before the dimming data is transferred, display

is turned on at the moment when transfer of the segment data is complete, at which time the

dimming value is undefined. The relationship between the data transfer and display is shown

in Figure 3.

VDD

DATA

LOAD

SEGn

Segment Data

Display OFF

Dimming Data

Undefined Dimming Value

Display ON

Figure 3 Relationship Between Advanced Transfer of Segment Data and Display

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