LA76818 Ver la hoja de datos (PDF) - Unspecified

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LA76818

The BUS Control Functions of LA76818 (Tentative)

Unspecified 

Technical Note of LA76818

2002/01/23

C Ext.

1 Selected-C In SW on

0 = select the chroma signal of internal composite video signal.

1 = select the chroma signal that input from pin 44.

C Bypass

1 Select chroma BPF bypass

Bypass switch of chroma band-pass filter.

1 = bypass ON

0 = bypass OFF

C Kill On

1 C Kill Mode ( 0: Enable Killer circuit )

Ever when the color control is minimized, but maybe there is still has little color left in

the picture. In this case, we can set Col_Kill as ‘1’ together with the minimum color

setting to get rid of the residual color.

0 = Automatic Mode (Normally using this mode when TV in operation)

1 = Enforce killer ON when color control is minimized.

C Kill Off

1 Disable Killer circuit ( for IC Test )

This mode is used when using IC tester for measurement.

1 : Test mode, in this case, killer circuit is not in operation.

0 : TV operating mode

Color System

3 Select Color System

The color system can be set to automatic mode (000/001) or manual mode (010〜111)

by CPU.

Setting of BUS bit:

000 = Automatic mode 1 PAL/NTSC/4.43NTSC(/SECAM)

001 = Automatic mode 2 PAL-M/PAL-N/NTSC

010 = PAL

011 = PAL-M

100 = PAL-N

101 = NTSC

110 = 4.43NTSC

111 = SECAM

Cont Test

1

Contrast control Test mode.

1:Test mode

0:Nomal mode

Enable contrast DAC test mode

Digital OSD

1 Select Digital OSD mode/Analogue OSD mode

0 = Analogue OSD mode(Clamp circuit ON).

1 = Digital OSD mode(Clamp circuit OFF)

Bright ABL Defeat

1 Disable brightness ABL

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