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參數資料
| 型號： | ADV7150 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | CMOS 220 MHz True-Color Graphics Triple 10-Bit Video RAM-DAC(三通道,10位視頻RAM-D/A轉換器) |
| 中文描述： | 220兆赫的CMOS真彩色圖形三路10位顯存，數模轉換器（三通道，10位視頻RAM的的D / A轉換器） |
| 文件頁數： | 15/36頁 |
| 文件大?。?/td> | 434K |
| 代理商： | ADV7150 |
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ADV7150
–15–
REV. A
Pipeline Delay and Onboard Calibration
T he ADV7150 has a fixed number of pipeline delays (t
PD
), so
long as timings t
10
and
τ
-t
11
are met. However, if a fixed pipeline
delay is not a requirement, timings t
10
and
τ
-t
11
can be ignored,
a calibration cycle must be run, and there is no restriction on
LOADIN to LOADOUT timing. If timings t
10
and
τ
-t
11
are not
met, the part will function correctly, although with an increased
number of pipeline delays, t
PD
+ N CLOCK S (for 4:1 mode
N = 4, for 2:1 mode N = 2, for 1:1 mode N = 0). T he ADV7150
has onboard calibration circuitry which synchronizes pixel data and
LOADIN with the internal ADV7150 clocking signals. Calibra-
tion can be performed in two ways: during the device’s initializa-
tion sequence by toggling two bits of the Mode Register, MR10
followed by MR15, or by writing a “1” to Bit CR10 of Command
Register 1 which executes a calibration on every Vertical Sync.
COLOR VIDE O MODE S
T he ADV7150 supports a number of color video modes all at
the maximum video rate.
Command bits CR24–CR27 of Command Register 2 along with
Bit MR11 of Mode Register 1 determine the color mode.
24-Bit “ Gamma” T rue Color
(CR25, CR26, CR27 = 1, 1, 1 and MR11 = 1)
T he part is set to 24-bit/30-bit T rue-Color operation. T he pixel
port accepts 24 bits of color data directly mapped to the
Look-Up T able RAM. T he Look-Up T able is configured as a
256 location by 30 bits deep RAM (10 bits each for Red, Green
and Blue). T he output of the RAM drives the DACs with 30-bit
data (10 bits each for Red, Green and Blue). T he RAM is
preloaded with a user-determined, nonlinear function, such as a
gamma correction curve.
10
10-BIT
RED DAC
10-BIT
BLUE DAC
RED
256 x 10
GREEN
256 x 10
BLUE
256 x 10
8
10-BIT
GREEN DAC
10
10
8
8
24-BIT
COLOR DATA
24-BIT TO 30-BIT
LOOK-UP TABLE
30-BIT
COLOR DATA
ANALOG VIDEO
OUTPUTS
RED
OUT
GREEN
OUT
BLUE
OUT
Figure 19. 24-Bit to 30-Bit True-Color Configuration
T his mode allows for the display of full 24-bit, Gamma-
Corrected T rue-Color Images.
24-Bit “ Standard” T rue Color
(CR25, CR26, CR27 = 1, 1, 1 and MR11 = 0)
T his mode sets the part into direct 24-bit T rue-Color operation.
T he pixel port accepts 24 bits of color data is directly mapped to
Look-Up T able RAM. T he Look-Up T able is configured as a
256 location by 24 bits deep RAM (8 bits each for Red, Green
and Blue) and essentially acts as a bypass RAM. T he output of
the RAM drives the DACs with 24-bit data (8 bits each for Red,
Green and Blue). T he RAM is preloaded with a linear function.
T his mode allows for the display of full 24-bit T rue-Color
Images.
8
8-BIT
RED DAC
8-BIT
BLUE DAC
RED
256 x 8
GREEN
256 x 8
BLUE
256 x 8
8
8-BIT
GREEN DAC
8
8
8
8
RED
OUT
GREEN
OUT
BLUE
OUT
24-BIT
COLOR DATA
24-BIT TO 24-BIT
LOOK-UP TABLE
24-BIT
COLOR DATA
ANALOG VIDEO
OUTPUTS
Figure 20. 24-Bit to 24-Bit Direct True-Color Configuration
8-Bit “ Gamma” Pseudo Color
(CR25, CR26, CR27 = X , 0, 0 or X , 1, 0 or X , 0, 1 and
MR11 = 1)
T his mode sets the part into 8-bit Pseudo-Color operation. T he
pixel port accepts 8 bits of pixel data which indexes a 30-bit
word in the Look-Up T able RAM. T he Look-Up T able is con-
figured as a 256 location by 30 bits deep RAM (10 bits each for
Red, Green and Blue). T he output of the RAM drives the
DACs with 30-bit data (10 bits each for Red, Green and Blue).
10
10-BIT
RED DAC
10-BIT
BLUE DAC
RED
256 x 10
GREEN
256 x 10
BLUE
256 x 10
10-BIT
GREEN DAC
10
10
8
RED
OUT
GREEN
OUT
BLUE
OUT
8-BIT PIXEL
DATA
8-BIT TO 30-BIT
LOOK-UP TABLE
30-BIT
COLOR DATA
ANALOG VIDEO
OUTPUTS
Figure 21. 8-Bit to 30-Bit Pseudo-Color Configuration
T his mode allows for the display of 256 simultaneous colors out
of a total palette of millions of addressable colors.
8-Bit “ Standard” Pseudo Color
(CR25, CR26, CR27 = X , 0, 0 or X , 1, 0 or X , 0, 1 and
MR11 = 0)
T his mode sets the part into 8-bit Pseudo-Color operation. T he
pixel port accepts 8 bits of pixel data which indexes a 24-bit
word in the Look-Up T able RAM. T he Look-Up T able is con-
figured as a 256 location by 24 bits deep RAM (10 bits each for
Red, Green and Blue). T he output of the RAM drives the
DACs with 24-bit data (8 bits each for Red, Green and Blue).
8
8-BIT
RED DAC
8-BIT
BLUE DAC
RED
256 x 8
GREEN
256 x 8
BLUE
256 x 8
8-BIT
GREEN DAC
8
8
8
RED
OUT
GREEN
OUT
BLUE
OUT
8-BIT PIXEL
DATA
8-BIT TO 24-BIT
LOOK-UP TABLE
24-BIT
COLOR DATA
ANALOG VIDEO
OUTPUTS
Figure 22. 8-Bit to 24-Bit Pseudo-Color Configuration
T his mode allows for the display of 256 simultaneous colors out
of a total palette of millions of addressable colors.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADV7150KS110 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ADV7150LS110 | 制造商:AD 制造商全稱:Analog Devices 功能描述:CMOS 220 MHz True-Color Graphics Triple 10-Bit Video RAM-DAC |
| ADV7150LS135 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ADV7150LS170 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ADV7150LS220 | 制造商:Analog Devices 功能描述: |
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