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CXD2064Q

Description of Functions

• Y/C separation mode

The Y/C separation mode can be switched by the following pin settings.

Adaptive processing mode:

Y/C separation is performed by detecting the correlation between three lines and switching between comb

filter and BPF processing.

BPF separation mode:

Y/C separation is performed only by BPF processing.

Through mode:

The composite video signal input from ADIN (Pin 2) is A/D converted and then D/A converted without

modification. D/A outputs are AYO (Pin 9) and ACO (Pin 7).

• Horizontal aperture correction circuit

This circuit corrects the frequency response degradation caused by the aperture effects accompanying D/A

conversion. This circuit is valid in the adaptive processing and BPF separation modes noted above.

• Trap filter circuit

A trap filter is applied to remove the frequency components near fsc in the luminance signal after Y/C

separation.

This reduces the fsc frequency component gain by approximately 2.5dB.

This circuit is valid in the adaptive processing and BPF separation modes noted above.

• Using the internal PLL (clock selection method)

Mode name

Adaptive processing mode

BPF separation mode

Through mode

MOD2 (Pin 17)

L

H

H

MOD1 (Pin 19)

L

L

H

PLL used

PLL not used

FIN (Pin 37)

fsc input

2fsc input

4fsc input

CKSL (Pin 38)

H

H

L

PLSL (Pin 39)

L

H

L/H