CS7615-KQ Просмотр технического описания (PDF) - Cirrus Logic
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CS7615-KQ Datasheet PDF : 36 Pages
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CS7615
Gain Registers (25-26h)
25h:
7
AGC10
r/w
6
AGC9
r/w
5
AGC8
r/w
4
AGC7
r/w
3
AGC6
r/w
2
AGC5
r/w
1
AGC4
r/w
0
AGC3
r/w
26h:
7
6
5
4
3
2
1
0
res
res
res
res
res
AGC2
AGC1
AGC0
r
r
r
r
r
r/w
r/w
r/w
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):
7
agcer7
r
6
agcer6
r
5
agcer5
r
4
agcer4
r
3
agcer3
r
2
agcer2
r
1
agcer1
r
0
agcer0
r
AGCER
The 8 MSBs of the gain error statistic calculated as part of the AGC loop.
AGC Count Statistic Register (28h)
7
6
5
4
3
2
1
0
res
agcct6
agcct5
agcct4
agcct3
agcct2
agct1
agcct0
r
r
r
r
r
r
r
r
AGCCT
The output of the 1-of-7 block which denotes the bin where the AGC target was met.
AGC Target Value Register (29h)
7
6
5
4
3
2
1
0
res
res
res
res
res
agctg2
agctg1
agctg0
r
r
r
r
r
r/w
r/w
r/w
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
18
DS231PP6
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