CS7666 datasheet(22/42 Pages) CIRRUS

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CS7666

DS302PP1

Scaler Control (04h)

MODE[2:0]

Selects 1 of 8 pre-defined scaling ratios.

CUSTOM

When set, scaler uses custom values held in registers 2Dh-2Fh.

TRUE_7666

When set, pin 54 is ignored and the CS7666 is in native mode. The default is CS7665 compat-

ibility mode. (pin 54 selects 5:4 scaler.)

PAL

Logic 1 selects PAL timing for HREF and VREF. Default is NTSC.

Feature Control Register (05h)

AWB

The Automatic White Balance procedure is initiated by pointing to a white scene and setting this

bit high. The bit will return a logic high while the AWB procedure is in progress. Setting this bit

low will have no effect. This bit will always be read as a “0” when the AWB is not in progress.

GAMON

The gamma correction from the gamma ram look up table is applied to the video signal in R-G-

B space when this bit is set high. The gamma ram is a fully user programmable, 256 entry look

up table.

LUMOFF

Setting LUMOFF bit high disables the luma peaking filter.

CHROFF

Setting the CHROFF bit high disables the chroma low-pass filter for minimizing color aliasing.

76543210

res

PAL

TRUE_7666

CUSTOM

MODE2

MODE1

MODE0

Reserved

R/W

76543210

res

CHROFF

LUMOFF

GAMON

AWB

res

Reserved

R/W

Reserved

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