ADV7150LS135 AD [Analog Devices], ADV7150LS135 Datasheet - Page 16

• Manufacturer Part Number: ADV7150LS135
• Description: CMOS 220 MHz True-Color Graphics Triple 10-Bit Video RAM-DAC
• Manufacturer: AD [Analog Devices]

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).
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).
5
5
5
COLOR DATA
COLOR DATA
Figure 23. 15-Bit to 30-Bit True-Color Configuration
Figure 24. 15-Bit to 24-Bit True-Color Configuration
5
5
5
15-BIT
15-BIT
LOOK-UP TABLE
LOOK-UP TABLE
15-BIT TO 30-BIT
15-BIT TO 24-BIT
32 x 10
32 x 8
RED
RED
GREEN
GREEN
32 x 10
32 x 8
32 x 10
BLUE
BLUE
32 x 8
COLOR DATA
COLOR DATA
10
10
10
8
8
8
30-BIT
24-BIT
GREEN DAC
GREEN DAC
BLUE DAC
BLUE DAC
RED DAC
RED DAC
10-BIT
10-BIT
10-BIT
8-BIT
8-BIT
8-BIT
ANALOG VIDEO
ANALOG VIDEO
OUTPUTS
OUTPUTS
RED
OUT
GREEN
OUT
BLUE
OUT
RED
OUT
GREEN
OUT
BLUE
OUT
–16–
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.
PIXEL
INPUT
DATA
R4
R3
R2
R1
R0
G4
G3
G2
G1
G0
B4
B3
B2
B1
B0
Figure 25. 15-Bit True-Color Mapping Using R3–R7,
G3–G7 and B3–B7
x
x
x
x
x
x
x
x
x
PIN
ASSIGN-
MENTS
G7
G6
G5
G4
G3
G2
G1
G0
R7
R6
R5
R4
R3
R2
R1
R0
B7
B6
B5
B4
B3
B2
B1
B0
R4
R3
R2
G4
G3
G2
G1
G0
B4
B3
B2
B0
R1
R0
B1
x
x
x
x
x
x
x
x
x
DATA
LATCHED
TO
PIXEL
PORT
DATA
INTERNALLY
SHIFTED
TO 5 LSBS
R4
R3
R2
G4
G3
G2
G1
G0
B4
B3
B2
R1
R0
B1
B0
0
0
0
0
0
0
0
0
0
5
5
5
LOCATION "0"
LOCATION "0"
LOCATION "0"
DATA LATCHES
FIRST 32
LOCATIONS
OF RAM
LOCATION "31"
LOCATION "31"
LOCATION "31"
(GREEN LUT)
(BLUE LUT)
(RED LUT)
256 x 10
256 x 10
256 x 10
RAM
RAM
RAM
10
10
10
TO
RED
DAC
TO
GREEN
DAC
TO
BLUE
DAC
REV. A