CS7654 datasheet(42/62 Pages) CIRRUS

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CS7654

I2CBUSY

Logic high indicates that the CS7654 secondary I2C master is busy accessing the addressed

slave device.

INITACT

Logic high indicates the CS7654 master is busy initializing registers from the external I2C

EEPROM on the secondary I2C bus (if present).

HIZENB

Pin 44 status.

P4BYTE

Pin 46 status.

PIN I/O Control (02h at SA 0x34h)

PLLOUT

Logic high enables the PLL clock output to the CS7615 (pin 51).

Digital Gain Register (03h at SA 0x34h)

DG[0:4]

Controls the digital gain applied to the SVID_Y (Luminance) signal after the RGB to YCrCb con-

verter block. The range of gains are from 0 to 31/8 in increments of 1/8. A gain of 0, indicates

no brightness.

Scaler Control (04h at SA 0x34h)

MODE[2:0]

Selects 1 of 8 pre-defined scaling ratios.

CUSTOM

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

Feature Control Register (05h at SA 0x34h)

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

PLLOUT

Reserved

R/W

76543210

res

DG4

DG3

DG2

DG1

DG0

Reserved

R/W

76543210

res

CUSTOM

MODE2

MODE1

MODE0

Reserved

R/W

76543210

res

CHROFF

LUMOFF

GAMON

AWB

res

Reserved

R/W

Reserved

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