M1008_15 Datasheet, PDF (7/11 Pages) Unisonic Technologies – 16-BIT CCD/CIS ANALOG SIGNAL PROCESSOR

M1008
Preliminary
„ FUNCTIONAL DESCRIPTION (Cont.)
D8
D7
MUX order
D6
D5
D4
Channel Select
0
1=R-G-B
1=Red 1=Green 1=Blue
(Note)
(Note)
0=off
0=off
0=B-G-R
0=off
(Note)
(Note)
D3
Enable
Delay
1=on
(Note)
0=off
Note: Power-on default value
MUX Register Settings
D2
CDS1
Delay
1=4ns
0=2ns
(Note)
CMOS IC
D1
CDS2
Delay
1=4ns
0=2ns
(Note)
D0
ADCK
Delay
1=2ns
0=0ns
(Note)
PGA Gain Registers
There are three PGA registers for use in respectively programming the gain of the red, green and blue
channels. Bits D8, D7 and D6 in each register must hold low, and bits D5 through D0 control the gain range in 64
increments. The coding for the PGA registers is a straight binary. An all zero word corresponds to the minimum gain
setting (1x) and an all one word corresponds to the maximum gain setting (5.85x).
The M1008 distributes one Programmable Gain Amplifier (PGA) for each channel. Each PGA has a gain range
from 1x (0dB) to 5.85x (15.3dB), adjustable in 64 steps. Although the gain curve is approximately linear in dB, the
gain in V/V varies in nonlinear proportion with the register code, according to the following the equation:
Gain
=
1
+
5.85
4.85 * (63
-
G
)
63
Where G is the decimal value of the gain register contents, and varies from 0 to 63.
D8
D7
D6
D5
D4
D3
D2
D1
D0 Gain(V/V) Gain(dB)
0
0
0
MSB
LSB
0
0
0
0
0
0
0
0
0 (Note)
1.0
0.0
0
0
0
0
0
0
0
0
1
1.013
0.12
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0
0
0
1
1
1
1
1
0
5.43
14.7
0
0
0
1
1
1
1
1
1
5.85
15.3
Note: Power-on default value
Offset Registers
There are three PGA registers for use in respectively programming the offset of the red, green, and blue
channels. Bits D8 through D0 control the offset range from -250mV to 250mV in 512 increments.
The coding for the offset registers is sign magnitude, with D8 as the sign bit. The following table shows the
offset range as a function of the bits D8 through D0.
D8
D7
D6
D5
D4
D3
D2
D1
D0 Offset(mV)
MSB
LSB
0
0
0
0
0
0
0
0
0 (Note)
0
0
0
0
0
0
0
0
0
1
0.98
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0
1
1
1
1
1
1
1
1
250
1
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
0
1
-0.98
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1
1
1
1
1
1
1
1
1
-250
Note: Power-on default value
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
7 of 11
QW-R502-434.a