ADV7150LS170 Просмотр технического описания (PDF) - Analog Devices
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ADV7150LS170 Datasheet PDF : 36 Pages
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ADV7150
15-Bit “Gamma” True Color
(CR24, CR25, CR26, CR27 = 0, 0, 1, 1 or 1, 0, 1, 1 and
MR11 = 1)
The part is set to 15-bit True-Color operation. The pixel port
accepts 15-bits of color data which is mapped to the 5 LSBs of
each of the red, green and blue palettes of the Look-Up Table
RAM. The Look-Up Table is configured as a 32 location by
30 bits deep RAM (10 bits each for Red, Green and Blue). The
output of the RAM drives the DACs with 30-bit data (10 bits
each for Red, Green and Blue).
15-BIT
15-BIT TO 30-BIT
30-BIT
COLOR DATA LOOK-UP TABLE COLOR DATA
ANALOG VIDEO
OUTPUTS
RED
32 x 10
10
10-BIT
RED DAC
RED
OUT
5
5
GREEN
10
10-BIT
GREEN
5
32 x 10
GREEN DAC
OUT
BLUE
10
32 x 10
10-BIT
BLUE DAC
BLUE
OUT
Figure 23. 15-Bit to 30-Bit True-Color Configuration
This mode allows for the display of 15-bit, Gamma-Corrected
True-Color Images.
15-Bit “Standard” True Color
(CR24, CR25, CR26, CR27 = 0, 0, 1, 1 or 1, 0, 1, 1 and
MR11 = 0)
The part is set to 15-bit True-Color operation. The pixel port
accepts 15 bits of color data which is mapped to the 5 LSBs of
each of the red, green and blue palettes of the Look-Up Table
RAM. The Look-Up Table is configured as a 32 location by
24 bits deep RAM (8 bits each for Red, Green and Blue). The
output of the RAM drives the DACs with 24-bit data (8 bits
each for Red, Green and Blue).
15-BIT
15-BIT TO 24-BIT
24-BIT
COLOR DATA LOOK-UP TABLE COLOR DATA
ANALOG VIDEO
OUTPUTS
RED
32 x 8
8
8-BIT
RED DAC
RED
OUT
5
5
GREEN
8
8-BIT
GREEN
5
32 x 8
GREEN DAC
OUT
BLUE
8
32 x 8
8-BIT
BLUE DAC
BLUE
OUT
Figure 24. 15-Bit to 24-Bit True-Color Configuration
R4 R7 R4
R3 R6 R3
R2 R5 R2
R4
R1
R1
R3
R0
R0
x R2
x
x R1
x
R0
x
x
0
0
0
R4
R3
5
R2
R1
R0
256 x 10
RAM
(RED LUT)
LOCATION "31"
10
LOCATION "0"
TO
RED
DAC
G7
G4
G4
G6
G3
G3
G2 G5 G2
G4
G1
G1
G3
G0
G0
G2
x
x
x G1
x
G0
x
x
0
0
0
G4
G3
5
G2
G1
G0
256 x 10
RAM
(GREEN LUT)
LOCATION "31"
10
LOCATION "0"
TO
GREEN
DAC
B7
B4
B4
B6
B3
B3
B5
B2
B2
B4
B1
B1
B3
B0
B0
x B2
x
x B1
x
x B0
x
PIXEL
INPUT
DATA
PIN
ASSIGN-
MENTS
DATA
LATCHED
TO
PIXEL
PORT
0
256 x 10
0
RAM
0
(BLUE LUT)
B4
B3
5
B2
B1
B0
LOCATION "31"
10
LOCATION "0"
TO
BLUE
DAC
DATA
INTERNALLY
SHIFTED
TO 5 LSBS
DATA LATCHES
FIRST 32
LOCATIONS
OF RAM
Figure 25. 15-Bit True-Color Mapping Using R3–R7,
G3–G7 and B3–B7
This mode allows for the display of 15-bit True-Color Images.
PIXEL PORT MAPPING
The pixel data to the ADV7150 is automatically mapped in the
parts pixel port as determined by the pixel data mode pro-
grammed (Bits CR24–CR27 of Command Register 2).
Pixel data in the 24-bit True-Color modes is directly mapped to
the 24 color inputs R0–R7, G0–G7 and B0–B7.
There are three modes of operation for 8-bit Pseudo Color.
Each mode maps the input pixel data differently. Data can be
input one of the three color channels, R0–R7 or G0–G7 or
B0–B7.
–16–
REV. A
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