CS7615 datasheet(20/36 Pages) CIRRUS

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CS7615

DS231PP6

VRST Registers (2Eh, 2Fh)

2Eh:

2Fh:

These parameters are needed only when the VRST input is used.

VRSTN

The line number gets reset to this value on a negative edge of VRST. Default is 004h.

VRSTDY

Logic high denotes VRST will be delayed with respect to the line position. Default = 0 (no delay).

VRSTFLD

Logic high denotes the field is reset to even on a negative edge of VRST, logic low denotes the

field is reset to odd. Default = 0.

Maximum Shutter Exposure Register (30h)

MXSH

If the user chooses to limit the exposure time, the max shutter gain is set to this value. 00h=full

exposure, BFh=min exposure for NTSC, C4h= min exposure for PAL.

Operational Control #2 Register (31h)

BLKDIS

Logic high disables the black level loop. Black level remains at the current value. Default =0.

ADCAL1

Analog-to-digital converter option. When written to a logic high, calibration is immediately en-

tered. This bit goes back low when calibration is complete.

ADCAL2

Analog-to-digital converter option. Logic high results in calibration being done after every frame,

logic low results in calibration only on power up. Default = 0.

CNVFST

Logic high sets the frequency of HCLK to 16×the line frequency, logic low sets HCLK to 1×the

line frequency. Default = 0.

VRSTN8

VRSTN7

VRSTN6

VRSTN5

VRSTN4

VRSTN3

VRSTN2

VRSTN1

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res

VRSTDY

VRSTFLD

VRSTN0

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MSXH7

MSXH6

MSXH5

MSXH4

MSXH3

MSXH2

MSXH1

MSXH0

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res

BLKDIS

ADCAL1

ADCAL2

CNVFST

r/w

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