LA76818 Ver la hoja de datos (PDF) - Unspecified

Número de pieza

componentes Descripción

Fabricante

LA76818

The BUS Control Functions of LA76818 (Tentative)

Unspecified 

Technical Note of LA76818

2002/01/23

CbCr IN

1 Select YcbCr Input or SECAM Input.

Select SECAM Input or YcbCr Input.

0 : SECAM

1 : CbCr

G-Y Angle

4 Select G-Y angle

Select the demodulation angle of G-Y.

0 = 240 deg.

1 = 253 deg.

Color Killer

3 Select color killer operational level

Operational Point

Select

Color killer operational point can be selected depend on the input signal (etc. RF input

or Y/C input).

000 = -30dB

111 = -40dB

VBLK SW

1 V blanking control SW

The SW of V blanking.

0(nomal mode)= video signal period 24H ~ 262H(NTSC)

1(wide mode)= video signal period 29H ~ 257H(NTSC)

25H~309H(PAL)

30H~304H(PAL)

FBP Blanking OR SW 1 Select Horizontal blanking operation

The “OR” of the H blanking (produced inside IC) and external input FBP signal

0 = Horizontal blanking is created by the internal logic.

1 = Horizontal blanking is the “OR” of the FBP & internal logic.

Fsc or Csync output

1 Select 22pin output.

Select 22pin output. It need pull-up or pull-down resistor.

0:Fsc (need pull-down resistor)

1:Composite sync (need pull-up resistor)

Y APF Select

1 Select Chroma Trap ON/OFF.

Use YcbCr input mode and YC input mode.

0 = Chroma Trap ON

1 = All Pass Filter mode(Chroma Trap OFF):YcbCr mode and YC mode.

Pre/Over-shoot

adjustment

2 Select pre-shoot width

This function can adjust the pre-shoot component of the Y signal.

Usually, over-shoot component will increase when signal is proceeded in the IC. This

will cause unbalance with the pre-shoot (peaking frequency). Therefore, this function

can control shoot.

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