TA1287PG,TA1287FG

2004-08-03

5

FUNCTION DESCRIPTION

MIXING RATIO

TA1287PG, TA1287FG have a circuit, which mixes a main signal with an external input signal and outputs

the mixed signal. The mixing circuit has 8 combinations of mixing gain ratio of a main to an external

signals.

Table

The mixing ratio of external to main (TV)

THE MIXING RATIO

YS1

YS2

YS3

EXTERNAL

MAIN (TV)

L

L

L

0

1

H

L

L

0.3

0.7

L

H

L

0.4

0.6

H

H

L

0.5

0.5

L

L

H

0.6

0.4

H

L

H

0.7

0.3

L

H

H

0.8

0.2

H

H

H

1

0

MATRIX CONTROL

Pin 16 is a high-speed switch to control the matrix mode for output signals.

Table

Matrix mode depending on by the voltage of pin 16

VOLTAGE OF PIN 16 [V]

MODE

0

~

0.7

Through

~

2.3

RGB to YUV (PAL)

~

3.8

RGB to YUV (NTSC)

3.8 ~

RGB to YIQ