CS7615 datasheet(18/36 Pages) CIRRUS

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CS7615

DS231PP6

Gain Registers (25-26h)

25h:

26h:

AGC(10:0)

Gain control word for the automatic gain control. This 11 bit word is a 2’s compliment number

which has a minimum value of -784 (decimal) (Reg 26h = 04h; Reg 25h = 5F0h) for PAL or -

765d for NTSC (Reg 26h = 05h; Reg 25h = 03) and a maximum value of 484d (Reg 26h = 01h;

Reg 25h = E4h). The gain range is -54 dB to 38 dB in steps of 0.078 dB ideal, 0.12 dB max step

is guaranteed only for chip GAIN. Default is 000h.

AGC Error Statistic Register (27h):

AGCER

The 8 MSBs of the gain error statistic calculated as part of the AGC loop.

AGC Count Statistic Register (28h)

AGCCT

The output of the 1-of-7 block which denotes the bin where the AGC target was met.

AGC Target Value Register (29h)

AGCTG

The target value used in the AGC loop. It denotes the number of pixels that must be exceeded

for an intensity bin to give an output of ‘1’. Default is 0h.

000=64

100=1024

001=128

101=2048

010=256

110=4096

011=512

111=8192

76543210

AGC10

AGC9

AGC8

AGC7

AGC6

AGC5

AGC4

AGC3

r/w

res

AGC2

AGC1

AGC0

r/w

agcer7

agcer6

agcer5

agcer4

agcer3

agcer2

agcer1

agcer0

res

agcct6

agcct5

agcct4

agcct3

agcct2

agct1

agcct0

res

agctg2

agctg1

agctg0

r/w

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