MCM20027 Motorola, MCM20027 Datasheet - Page 35

• Manufacturer Part Number: MCM20027
• Description: Color SXGA Digital Image Sensor 1280 x 1024 pixel progressive scan solid state image sensor with integrated CDS/PGA/ADC / digital programming / control
• Manufacturer: Motorola

Revision 8.0 - 28 November 2001 :
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
13.0 Detailed Register Block Assignments
This section describes in further detail the functional op-
eration of the various MCM20027 programmable regis-
ters. The registers are subdivided into various blocks for
ease of addressability and use (see
In each table where a suffix code is used; h = hex, b =
binary, and d = decimal.
13.1 Analog Register Interface Block
The address range for this block is 00
13.1.1 Analog Color Configuration
Address
Address
Number
Number
msb (7)
msb (7)
7 - 6
5 - 0
7 - 6
00
01
Bit
Bit
x
x
h
h
Function
Function
Unused
Unused
Gain
x
x
6
6
MCM20027
Unused
PGA Gain Mode
Raw Gain Mode [cg1
Raw Gain Mode [cg1
(Range 0.696 - 2.736)
Linear Gain Mode -----> Gain = 0.6956 +(0.0434 x cg1
(Range 0.696 - 2.736)
Unused
cg1[5]
cg2[5]
5
5
Table
Table 8. DPGA Color 1 Gain Register
Table 9. DPGA Color 2 Gain Register
h
to BF
6).
DPGA Color 1 Gain Code
Green of Green-Red Row
DPGA Color 2 Gain Code
h
.
cg1[4]
cg2[4]
4
4
d
d
= 33-63
= 0-32
Red
Description
Description
d
The four Color Gain Registers,
Register, and four Color Tile Row definitions define how
white balance is achieved on the device. Six-bit gain
codes can be selected for four separate colors:
Table
ual color register is programmable given the gain func-
tion defined in the table. The gain function used
depends on what Gain mode (White balance gain
mode) the sensor is set
25).The user programs these registers to account for
changing light conditions to assure a white balanced
output. The default value in each register is provides for
a unity gain. In addition, the default CFA pattern color is
listed in the title of each register.
] ---> Gain = 0.6956 + (0.02174* cg1
d
] --> Gain = 1.391+ (0.0434* (cg1
cg1[3]
cg2[3]
3
3
9,
Table
10, and
cg1[2]
cg2[2]
2
2
Table
(PGA Gain Mode; Table
d
)
11. Gain for each individ-
cg1[1]
cg2[1]
Color Tile Configuration
ImageMOS
ImageMOS
1
1
d
-32)
d
)
001110
Default
Default
cg1[0]
cg2[0]
Reset
Reset
State
State
lsb (0)
lsb (0)
0E
0E
Table
xx
xx
h
h
MOTOROLA
b
8,
35